This is the mail archive of the
cygwin@sources.redhat.com
mailing list for the Cygwin project.
How the cygwin version of gcc calls the assembler
- To: <cygwin at cygwin dot com>
- Subject: How the cygwin version of gcc calls the assembler
- From: "Allan Clearwaters" <allan at object-forge dot com>
- Date: Thu, 14 Dec 2000 18:32:24 -0000
I am in the process of generating a cross-complier (toolchain plus gcc) for
a non-x86 achitecture. I run configure on the source tree and all is fine.
I start the make and all appears well until I get to building gcc. At this
point the native cygwin gcc produces assembler errors. Upon inspection I
find that the configure has put a soft link into the gcc directory to the
cross-assembler in the gas directory. If I run 'gcc -v --help' the problem
is apparent; it seems that gcc's specs currently do not explicitly define
the assembler it is to use and so it picks up the one in the current
directory if it exists (please see the output at the end of this message).
If I remove the link the build proceeds to the point where the new compiler
(xgcc) is invoked to build libreries and then this fails because it cannot
find the right assembler. Note this is not a problem if you are build a
native compiler and toolchain; it only becomes an issue when building cross
platform support. On this basis I am inclined to believe no one has picked
this up so far.
Is this a bug or is there a way to configure around this problem? I realize
this may not be the right place to get an answer but since this version of
gcc is part of cygwin I assume it's at least the right place to ask.
Thanx,
Allan Cleawaters
---------------------------------------------------------------------
gcc -v --help in outside the gcc build directory
bash-2.04$ gcc -v --help
Reading specs from /usr/lib/gcc-lib/i686-pc-cygwin/2.95.2-5/specs
Usage: gcc [options] file...
Options:
--help Display this information
-dumpspecs Display all of the built in spec strings
-dumpversion Display the version of the compiler
-dumpmachine Display the compiler's target processor
-print-search-dirs Display the directories in the compiler's search
path
-print-libgcc-file-name Display the name of the compiler's companion
library
-print-file-name=<lib> Display the full path to library <lib>
-print-prog-name=<prog> Display the full path to compiler component
<prog>
-print-multi-directory Display the root directory for versions of libgcc
-print-multi-lib Display the mapping between command line options
and
multiple library search directories
-Wa,<options> Pass comma-separated <options> on to the
assembler
-Wp,<options> Pass comma-separated <options> on to the
preprocessor
-Wl,<options> Pass comma-separated <options> on to the linker
-Xlinker <arg> Pass <arg> on to the linker
-save-temps Do not delete intermediate files
-pipe Use pipes rather than intermediate files
-specs=<file> Override builtin specs with the contents of
<file>
-std=<standard> Assume that the input sources are for <standard>
-B <directory> Add <directory> to the compiler's search paths
-b <machine> Run gcc for target <machine>, if installed
-V <version> Run gcc version number <version>, if installed
-v Display the programs invoked by the compiler
-E Preprocess only; do not compile, assemble or link
-S Compile only; do not assemble or link
-c Compile and assemble, but do not link
-o <file> Place the output into <file>
-x <language> Specify the language of the following input files
Permissable languages include: c c++ assembler
none
'none' means revert to the default behaviour of
guessing the language based on the file's
extension
Options starting with -g, -f, -m, -O or -W are automatically passed on to
the various sub-processes invoked by gcc. In order to pass other options
on to these processes the -W<letter> options must be used.
gcc version 2.95.2-5 19991024 (cygwin experimental)
/usr/lib/gcc-lib/i686-pc-cygwin/2.95.2-5/cpp.exe -lang-c -v -D__GNUC__=2 -D_
_GNUC_MINOR__=95 -Di386 -D__386__ -D__i386 -D_X86=1 -D__STDC__=1 -D__stdcall
=__attribute__((__stdcall__)) -D__cdecl=__attribute__((__cdecl__)) -D__decls
pec(x)=__attribute__((x)) -D__i386__ -D__386__ -D__i386 -D_X86=1 -D__STDC__=
1 -D__stdcall=__attribute__((__stdcall__)) -D__cdecl=__attribute__((__cdecl_
_)) -D__declspec(x)=__attribute__((x)) -D__i386 -Asystem(winnt) -Acpu(i386)
-Amachine(i386) -remap -Acpu(i386) -Amachine(i386) -Di386 -D__i386 -D__i386_
_ -Di686 -Dpentiumpro -D__i686 -D__i686__ -D__pentiumpro -D__pentiumpro__ -D
__CYGWIN32__ -D__CYGWIN__ -Dunix -D__unix__ -D__unix -D_WIN32 -DWINNT -isyst
em /usr/include/w32api --help help-dummy /tmp/cctTlKpf.i
GNU CPP version 2.95.2-5 19991024 (cygwin experimental) (80386, BSD syntax)
Usage: cpp.exe [switches] input output
Switches:
-include <file> Include the contents of <file> before other
files
-imacros <file> Accept definition of marcos in <file>
-iprefix <path> Specify <path> as a prefix for next two options
-iwithprefix <dir> Add <dir> to the end of the system include paths
-iwithprefixbefore <dir> Add <dir> to the end of the main include paths
-isystem <dir> Add <dir> to the start of the system include
paths
-idirafter <dir> Add <dir> to the end of the system include paths
-I <dir> Add <dir> to the end of the main include paths
-nostdinc Do not search the system include directories
-nostdinc++ Do not search the system include directories for
C++
-o <file> Put output into <file>
-pedantic Issue all warnings demanded by strict ANSI C
-traditional Follow K&R pre-processor behaviour
-trigraphs Support ANSI C trigraphs
-lang-c Assume that the input sources are in C
-lang-c89 Assume that the input is C89; depricated
-lang-c++ Assume that the input sources are in C++
-lang-objc Assume that the input sources are in ObjectiveC
-lang-objc++ Assume that the input sources are in
ObjectiveC++
-lang-asm Assume that the input sources are in assembler
-lang-chill Assume that the input sources are in Chill
-std=<std name> Specify the conformance standard; one of:
gnu89, gnu9x, c89, c9x, iso9899:1990,
iso9899:199409, iso9899:199x
-+ Allow parsing of C++ style features
-w Inhibit warning messages
-Wtrigraphs Warn if trigraphs are encountered
-Wno-trigraphs Do not warn about trigraphs
-Wcomment{s} Warn if one comment starts inside another
-Wno-comment{s} Do not warn about comments
-Wtraditional Warn if a macro argument is/would be turned into
a string if -traditional is specified
-Wno-traditional Do not warn about stringification
-Wundef Warn if an undefined macro is used by #if
-Wno-undef Do not warn about testing undefined macros
-Wimport Warn about the use of the #import directive
-Wno-import Do not warn about the use of #import
-Werror Treat all warnings as errors
-Wno-error Do not treat warnings as errors
-Wall Enable all preprocessor warnings
-M Generate make dependencies
-MM As -M, but ignore system header files
-MD As -M, but put output in a .d file
-MMD As -MD, but ignore system header files
-MG Treat missing header file as generated files
-g Include #define and #undef directives in the
output
-D<macro> Define a <macro> with string '1' as its value
-D<macro>=<val> Define a <macro> with <val> as its value
-A<question> (<answer>) Assert the <answer> to <question>
-U<macro> Undefine <macro>
-u or -undef Do not predefine any macros
-v Display the version number
-H Print the name of header files as they are used
-C Do not discard comments
-dM Display a list of macro definitions active at
end
-dD Preserve macro definitions in output
-dN As -dD except that only the names are preserved
-dI Include #include directives in the output
-ifoutput Describe skipped code blocks in output
-P Do not generate #line directives
-$ Do not include '$' in identifiers
-remap Remap file names when including files.
-h or --help Display this information
/usr/lib/gcc-lib/i686-pc-cygwin/2.95.2-5/cc1.exe
/tmp/cctTlKpf.i -quiet -dumpbase help-dummy.c -version --help -o
/tmp/ccE2KVSR.s
Usage: cc1.exe input [switches]
Switches:
-ffixed-<register> Mark <register> as being unavailable to the
compiler
-fcall-used-<register> Mark <register> as being corrupted by function
calls
-fcall-saved-<register> Mark <register> as being preserved across
functions
-finline-limit-<number> Limits the size of inlined functions to <number>
-fident Process #ident directives
-fleading-underscore External symbols have a leading underscore
-finstrument-functions Instrument function entry/exit with profiling
calls
-fdump-unnumbered Suppress output of instruction numbers and line
number notes in debugging dumps
-fprefix-function-name Add a prefix to all function names
-fcheck-memory-usage Generate code to check every memory access
-fstrict-aliasing Assume strict aliasing rules apply
-fargument-noalias-global Assume arguments do not alias each other or
globals
-fargument-noalias Assume arguments may alias globals but not each
other
-fargument-alias Specify that arguments may alias each other &
globals
-fstack-check Insert stack checking code into the program
-fgcc-struct Pack structure members using gcc default rules
-fnative-struct Pack structure members consistent with some other
(native) compiler
-fpack-struct Pack structure members together without holes
-foptimize-register-move Do the full regmove optimization pass
-fregmove Enables a register move optimisation
-fgnu-linker Output GNU ld formatted global initialisers
-fverbose-asm Add extra commentry to assembler output
-fdata-sections place data items into their own section
-ffunction-sections place each function into its own section
-finhibit-size-directive Do not generate .size directives
-fcommon Do not put unitialised globals in the common
section
-ffast-math Improve FP speed by violating ANSI & IEEE rules
-fbranch-probabilities Use profiling information for branch probabilities
-ftest-coverage Create data files needed by gcov
-fprofile-arcs Insert arc based program profiling code
-fasynchronous-exceptions Support asynchronous exceptions
-fsjlj-exceptions Use setjmp/longjmp to handle exceptions
-fnew-exceptions Use the new model for exception handling
-fexceptions Enable exception handling
-fpic Generate position independent code, if possible
-fbranch-count-reg Replace add,compare,branch with branch on count
reg
-fsched-spec-load-dangerous Allow speculative motion of more loads
-fsched-spec-load Allow speculative motion of some loads
-fsched-spec Allow speculative motion of non-loads
-fsched-interblock Enable scheduling across basic blocks
-fschedule-insns2 Run two passes of the instruction scheduler
-fschedule-insns Reschedule instructions to avoid pipeline stalls
-fpretend-float Pretend that host and target use the same FP
format
-frerun-loop-opt Run the loop optimiser twice
-frerun-cse-after-loop Run CSE pass after loop optimisations
-fgcse Perform the global common subexpression
elimination
-fdelayed-branch Attempt to fill delay slots of branch instructions
-freg-struct-return Return 'short' aggregates in registers
-fpcc-struct-return Return 'short' aggregates in memory, not registers
-fcaller-saves Enable saving registers around function calls
-fshared-data Mark data as shared rather than private
-fsyntax-only Check for syntax errors, then stop
-fkeep-static-consts Emit static const variables even if they are not
used
-finline Pay attention to the 'inline' keyword
-fkeep-inline-functions Generate code for funcs even if they are fully
inlined
-finline-functions Integrate simple functions into their callers
-ffunction-cse Allow function addresses to be held in registers
-fforce-addr Copy memory address constants into regs before
using
-fforce-mem Copy memory operands into registers before using
-fpeephole Enable machine specific peephole optimisations
-fwritable-strings Store strings in writable data section
-freduce-all-givs Strength reduce all loop general induction
variables
-fmove-all-movables Force all loop invariant computations out of loops
-funroll-all-loops Perform loop unrolling for all loops
-funroll-loops Perform loop unrolling when iteration count is
known
-fstrength-reduce Perform strength reduction optimisations
-fthread-jumps Perform jump threading optimisations
-fexpensive-optimizations Perform a number of minor, expensive
optimisations
-fcse-skip-blocks When running CSE, follow conditional jumps
-fcse-follow-jumps When running CSE, follow jumps to their targets
-fomit-frame-pointer When possible do not generate stack frames
-fdefer-pop Defer popping functions args from stack until
later
-fvolatile-static Consider all mem refs to static data to be
volatile
-fvolatile-global Consider all mem refs to global data to be
volatile
-fvolatile Consider all mem refs through pointers as volatile
-ffloat-store Do not store floats in registers
-O[number] Set optimisation level to [number]
-Os Optimise for space rather than speed
-pedantic Issue warnings needed by strict compliance to ANSI
C
-pedantic-errors Like -pedantic except that errors are produced
-w Suppress warnings
-W Enable extra warnings
-Winline Warn when an inlined function cannot be inlined
-Wuninitialized Warn about unitialized automatic variables
-Wcast-align Warn about pointer casts which increase alignment
-Waggregate-return Warn about returning structures, unions or arrays
-Wswitch Warn about enumerated switches missing a specific
case
-Wshadow Warn when one local variable shadows another
-Wunused Warn when a variable is unused
-Wid-clash-<num> Warn if 2 identifiers have the same first <num>
chars
-Wlarger-than-<number> Warn if an object is larger than <number> bytes
-p Enable function profiling
-a Enable block profiling
-ax Enable jump profiling
-o <file> Place output into <file>
-G <number> Put global and static data smaller than <number>
bytes into a special section (on some targets)
-gcoff Generate COFF format debug output
-gstabs+ Generate extended STABS format debug output
-gstabs Generate STABS format debug output
-ggdb Generate default extended debug format output
-g Generate default debug format output
-aux-info <file> Emit declaration info into <file>.X
-quiet Do not display functions compiled or elapsed time
-version Display the compiler's version
-d[letters] Enable dumps from specific passes of the compiler
-dumpbase <file> Base name to be used for dumps from specific
passes
-sched-verbose-<number> Set the verbosity level of the scheduler
--help Display this information
Language specific options:
-ansi Compile just for ANSI C
-fallow-single-precisio Do not promote floats to double if
using -traditional
-std= Determine language standard
-funsigned-bitfields Make bitfields by unsigned by default
-fsigned-char Make 'char' be signed by default
-funsigned-char Make 'char' be unsigned by default
-traditional Attempt to support traditional K&R style C
-fno-asm Do not recognise the 'asm' keyword
-fno-builtin Do not recognise any built in functions
-fhosted Assume normal C execution environment
-ffreestanding Assume that standard libraries & main might not
exist
-fcond-mismatch Allow different types as args of ? operator
-fdollars-in-identifier Allow the use of $ inside identifiers
-fshort-double Use the same size for double as for float
-fshort-enums Use the smallest fitting integer to hold enums
-Wall Enable most warning messages
-Wbad-function-cast Warn about casting functions to incompatible types
-Wmissing-noreturn Warn about functions which might be candidates for
attribute noreturn
-Wcast-qual Warn about casts which discard qualifiers
-Wchar-subscripts Warn about subscripts whose type is 'char'
-Wcomment Warn if nested comments are detected
-Wcomments Warn if nested comments are detected
-Wconversion Warn about possibly confusing type conversions
-Wformat Warn about printf format anomalies
-Wimplicit-function-dec Warn about implicit function declarations
-Wimplicit-int Warn when a declaration does not specify a type
-Wimport Warn about the use of the #import directive
-Wno-long-long Do not warn about using 'long long' when -pedantic
-Wmain Warn about suspicious declarations of main
-Wmissing-braces Warn about possibly missing braces around
initialisers
-Wmissing-declarations Warn about global funcs without previous
declarations
-Wmissing-prototypes Warn about global funcs without prototypes
-Wmultichar Warn about use of multicharacter literals
-Wnested-externs Warn about externs not at file scope level
-Wparentheses Warn about possible missing parentheses
-Wpointer-arith Warn about function pointer arithmetic
-Wredundant-decls Warn about multiple declarations of the same
object
-Wsign-compare Warn about signed/unsigned comparisons
-Wunknown-pragmas Warn about unrecognised pragmas
-Wstrict-prototypes Warn about non-prototyped function decls
-Wtraditional Warn about constructs whose meaning change in ANSI
C
-Wtrigraphs Warn when trigraphs are encountered
-Wwrite-strings Mark strings as 'const char *'
Options for Objective C:
-gen-decls Dump decls to a .decl file
-fgnu-runtime Generate code for GNU runtime environment
-fnext-runtime Generate code for NeXT runtime environment
-Wselector Warn if a selector has multiple methods
-Wno-protocol Do not warn if inherited methods are unimplemented
-print-objc-runtime-inf Generate C header of platform specific features
Options for C++:
-fno-access-control Do not obey access control semantics
-fall-virtual Make all member functions virtual
-falt-external-template Change when template instances are emitted
-fcheck-new Check the return value of new
-fconserve-space Reduce size of object files
-fno-const-strings Make string literals `char[]' instead of `const
char[]'
-fno-default-inline Do not inline member functions by default
-fno-rtti Do not generate run time type descriptor
information
-fno-for-scope Scope of for-init-statement vars extends outside
-fguiding-decls Implement guiding declarations
-fno-gnu-keywords Do not recognise GNU defined keywords
-fhandle-signatures Handle signature language constructs
-fhonor-std Treat the namespace `std' as a normal namespace
-fhuge-objects Enable support for huge objects
-fno-implement-inlines Export functions even if they can be inlined
-fno-implicit-templates Only emit explicit template instatiations
-fno-implicit-inline-te Only emit explicit instatiations of inline
templates
-finit-priority Handle the init_priority attribute
-flabels-ok Labels can be used as first class objects
-fnew-abi Enable experimental ABI changes
-fno-nonnull-objects Do not assume that a reference is always valid
-foperator-names Recognise and/bitand/bitor/compl/not/or/xor
-fno-optional-diags Disable optional diagnostics
-fpermissive Downgrade conformance errors to warnings
-frepo Enable automatic template instantiation
-fsquangle Enable squashed name mangling
-fstats Display statistics accumulated during compilation
-fno-strict-prototype Do not assume that empty prototype means no args
-ftemplate-depth- Specify maximum template instantiation depth
-fthis-is-variable Make 'this' not be type '* const'
-fvtable-gc Discard unused virtual functions
-fvtable-thunks Implement vtables using thunks
-fweak Emit common-like symbols as weak symbols
-fxref Emit cross referencing information
-Wreturn-type Warn about inconsistent return types
-Woverloaded-virtual Warn about overloaded virtual function names
-Wno-ctor-dtor-privacy Don't warn when all ctors/dtors are private
-Wnon-virtual-dtor Warn about non virtual destructors
-Wextern-inline Warn when a function is declared extern, then
inline
-Wreorder Warn when the compiler reorders code
-Wsynth Warn when synthesis behaviour differs from Cfront
-Wno-pmf-conversions Don't warn when type converting pointers to member
functions
-Weffc++ Warn about violations of Effective C++ style rules
-Wsign-promo Warn when overload promotes from unsigned to
signed
-Wold-style-cast Warn if a C style cast is used in a program
-Wno-non-template-frien Don't warn when non-templatized friend functions
are declared within a template
-Wno-deprecated Don't announce deprecation of compiler features
Options for Fortran:
-fversion Print g77-specific compiler version info, run
internal tests
-ff66 Program is written in typical FORTRAN 66 dialect
-ff77 Program is written in typical Unix f77 dialect
-fno-f77 Program does not use Unix-f77 dialectal features
-ff90 Program is written in Fortran-90-ish dialect
-fno-automatic Treat local vars and COMMON blocks as if they were
named in SAVE statements
-fdollar-ok Allow $ in symbol names
-fno-f2c f2c-compatible code need not be generated
-fno-f2c-library Unsupported; do not generate libf2c-calling code
-fflatten-arrays Unsupported; affects code-generation of arrays
-ffree-form Program is written in Fortran-90-ish free form
-fpedantic Warn about use of (only a few for now) Fortran
extensions
-fvxt Program is written in VXT (Digital-like) FORTRAN
-fno-ugly Disallow all ugly features
-fno-ugly-args Hollerith and typeless constants not passed as
arguments
-fugly-assign Allow ordinary copying of ASSIGN'ed vars
-fugly-assumed Dummy array dimensioned to (1) is assumed-size
-fugly-comma Trailing comma in procedure call denotes null
argument
-fugly-complex Allow REAL(Z) and AIMAG(Z) given DOUBLE COMPLEX Z
-fno-ugly-init Initialization via DATA and PARAMETER is
type-compatible
-fugly-logint Allow INTEGER and LOGICAL interchangeability
-fxyzzy Print internal debugging-related info
-finit-local-zero Initialize local vars and arrays to zero
-fno-backslash Backslashes in character/hollerith constants not
special (C-style)
-femulate-complex Have front end emulate COMPLEX arithmetic to avoid
bugs
-fno-underscoring Disable the appending of underscores to externals
-fno-second-underscore Never append a second underscore to externals
-fintrin-case-initcap Intrinsics spelled as e.g. SqRt
-fintrin-case-upper Intrinsics in uppercase
-fintrin-case-any Intrinsics letters in arbitrary cases
-fmatch-case-initcap Language keywords spelled as e.g. IOStat
-fmatch-case-upper Language keywords in uppercase
-fmatch-case-any Language keyword letters in arbitrary cases
-fsource-case-upper Internally convert most source to uppercase
-fsource-case-preserve Internally preserve source case
-fsymbol-case-initcap Symbol names spelled in mixed case
-fsymbol-case-upper Symbol names in uppercase
-fsymbol-case-lower Symbol names in lowercase
-fcase-strict-upper Program written in uppercase
-fcase-strict-lower Program written in lowercase
-fcase-initcap Program written in strict mixed-case
-fcase-upper Compile as if program written in uppercase
-fcase-lower Compile as if program written in lowercase
-fcase-preserve Preserve all spelling (case) used in program
-fbadu77-intrinsics-del Delete libU77 intrinsics with bad interfaces
-fbadu77-intrinsics-dis Disable libU77 intrinsics with bad interfaces
-fbadu77-intrinsics-hid Hide libU77 intrinsics with bad interfaces
-ff2c-intrinsics-delete Delete non-FORTRAN-77 intrinsics f2c supports
-ff2c-intrinsics-disabl Disable non-FORTRAN-77 intrinsics f2c supports
-ff2c-intrinsics-hide Hide non-FORTRAN-77 intrinsics f2c supports
-ff90-intrinsics-delete Delete non-FORTRAN-77 intrinsics F90 supports
-ff90-intrinsics-disabl Disable non-FORTRAN-77 intrinsics F90 supports
-ff90-intrinsics-hide Hide non-FORTRAN-77 intrinsics F90 supports
-fgnu-intrinsics-delete Delete non-FORTRAN-77 intrinsics g77 supports
-fgnu-intrinsics-disabl Disable non-FORTRAN 77 intrinsics F90 supports
-fgnu-intrinsics-hide Hide non-FORTRAN 77 intrinsics F90 supports
-fmil-intrinsics-delete Delete MIL-STD 1753 intrinsics
-fmil-intrinsics-disabl Disable MIL-STD 1753 intrinsics
-fmil-intrinsics-hide Hide MIL-STD 1753 intrinsics
-funix-intrinsics-delet Delete libU77 intrinsics
-funix-intrinsics-disab Disable libU77 intrinsics
-funix-intrinsics-hide Hide libU77 intrinsics
-fvxt-intrinsics-delete Delete non-FORTRAN-77 intrinsics VXT FORTRAN
supports
-fvxt-intrinsics-disabl Disable non-FORTRAN-77 intrinsics VXT FORTRAN
supports
-fvxt-intrinsics-hide Hide non-FORTRAN-77 intrinsics VXT FORTRAN
supports
-fzeros Treat initial values of 0 like non-zero values
-fdebug-kludge Emit special debugging information for COMMON and
EQUIVALENCE
-fonetrip Take at least one trip through each iterative DO
loop
-fno-silent Print names of program units as they are compiled
-fno-globals Disable fatal diagnostics about inter-procedural
problems
-ftypeless-boz Make prefix-radix non-decimal constants be
typeless
-fbounds-check Generate code to check subscript and substring
bounds
-ffortran-bounds-check Fortran-specific form of -fbounds-check
-Wno-globals Disable warnings about inter-procedural problems
-Wsurprising Warn about constructs with surprising meanings
-I Add a directory for INCLUDE searching
-ffixed-line-length- Set the maximum line length
Options for Java:
-fno-bounds-check Disable automatic array bounds checking
-fassume-compiled Make is_compiled_class return 1
-femit-class-files Dump class files to <name>.class
-MD Print dependencies to FILE.d
-MMD Print dependencies to FILE.d
-M Print dependencies to stdout
-MM Print dependencies to stdout
-fclasspath Set class path and suppress system path
-fCLASSPATH Set class path
-I Add directory to class path
-foutput-class-dir Directory where class files should be written
-Wredundant-modifiers Warn if modifiers are specified when not necessary
-Wunsupported-jdk11 Warn if `final' local variables are specified
Target specific options:
-mthreads Use Mingw-specific thread support
-mnop-fun-dllimport Ignore dllimport for functions
-mdll Generate code for a DLL
-mconsole Create console application
-mno-win32 Don't set Windows defines
-mwindows Create GUI application
-mno-cygwin Use the Mingw32 interface
-mcygwin Use the Cygwin interface
-mstack-arg-probe Enable stack probing
-mno-move Don't generate mem-mem moves
-mmove Generate mem-mem moves
-mschedule-prologue Schedule function prologues
-mwide-multiply multiplies of 32 bits are 64 bits
-mno-wide-multiply multiplies of 32 bits constrained to 32 bits
-momit-leaf-frame-point Omit the frame pointer in leaf functions
-mfancy-math-387 Generate sin, cos, sqrt for FPU
-mno-fancy-math-387 Do not generate sin, cos, sqrt for 387
-mno-fp-ret-in-387 Do not return values of functions in FPU registers
-mfp-ret-in-387 Return values of functions in FPU registers
-mno-ieee-fp Do not use IEEE math for fp comparisons
-mieee-fp Use IEEE math for fp comparisons
-mno-svr3-shlib Uninitialized locals in .data
-msvr3-shlib Uninitialized locals in .bss
-mno-align-double Align doubles on word boundary
-malign-double Align some doubles on dword boundary
-mno-rtd Use normal calling convention
-mrtd Alternate calling convention
-mpentiumpro Same as -mcpu=pentiumpro
-mpentium Same as -mcpu=pentium
-m486 Same as -mcpu=i486
-m386 Same as -mcpu=i386
-mno-soft-float Use hardware fp
-msoft-float Do not use hardware fp
-mhard-float Use hardware fp
-mno-80387 Do not use hardware fp
-m80387 Use hardware fp
-mbranch-cost= Branches are this expensive (1-5, arbitrary units)
-mpreferred-stack-bound Attempt to keep stack aligned to this power of 2
-malign-functions= Function starts are aligned to this power of 2
-malign-jumps= Jump targets are aligned to this power of 2
-malign-loops= Loop code aligned to this power of 2
-mregparm= Number of registers used to pass integer arguments
-mreg-alloc= Control allocation order of integer registers
-march= Generate code for given CPU
-mcpu= Schedule code for given CPU
There are undocumented target specific options as well.
as --help -o /tmp/cch9D6tT.o /tmp/ccE2KVSR.s
Usage: as [option...] [asmfile...]
Options:
-a[sub-option...] turn on listings
Sub-options [default hls]:
c omit false conditionals
d omit debugging directives
h include high-level source
l include assembly
m include macro expansions
n omit forms processing
s include symbols
L include line debug statistics (if
applicable)
=FILE list to FILE (must be last sub-option)
-D produce assembler debugging messages
--defsym SYM=VAL define symbol SYM to given value
-f skip whitespace and comment preprocessing
--gstabs generate stabs debugging information
--gdwarf2 generate DWARF2 debugging information
--help show this message and exit
--target-help show target specific options
-I DIR add DIR to search list for .include directives
-J don't warn about signed overflow
-K warn when differences altered for long
displacements
-L,--keep-locals keep local symbols (e.g. starting with `L')
-M,--mri assemble in MRI compatibility mode
--MD FILE write dependency information in FILE (default
none)
-nocpp ignored
-o OBJFILE name the object-file output OBJFILE (default
a.out)
-R fold data section into text section
--statistics print various measured statistics from execution
--strip-local-absolute strip local absolute symbols
--traditional-format Use same format as native assembler when possible
--version print assembler version number and exit
-W --no-warn suppress warnings
--warn don't suppress warnings
--fatal-warnings treat warnings as errors
--itbl INSTTBL extend instruction set to include instructions
matching the specifications defined in file
INSTTBL
-w ignored
-X ignored
-Z generate object file even after errors
--listing-lhs-width set the width in words of the output data column
of
the listing
--listing-lhs-width2 set the width in words of the continuation lines
of the output data column; ignored if smaller than
the width of the first line
--listing-rhs-width set the max width in characters of the lines from
the source file
--listing-cont-lines set the maximum number of continuation lines used
for the output data column of the listing
-q quieten some warnings
Report bugs to bug-gnu-utils@gnu.org
/usr/lib/gcc-lib/i686-pc-cygwin/2.95.2-5/collect2.exe -Bdynamic --help
/usr/lib/crt0.o -L/usr/lib/gcc-lib/i686-pc-cygwin/2.95.2-5 -L/usr/lib/mingw
/tmp/cch9D6tT.o -lgcc -lcygwin -luser32 -lkernel32 -ladvapi32 -lshell32 -lgc
c
Usage: /usr/bin/ld [options] file...
Options:
-a KEYWORD Shared library control for HP/UX compatibility
-A ARCH, --architecture ARCH
Set architecture
-b TARGET, --format TARGET Specify target for following input files
-c FILE, --mri-script FILE Read MRI format linker script
-d, -dc, -dp Force common symbols to be defined
-e ADDRESS, --entry ADDRESS Set start address
-E, --export-dynamic Export all dynamic symbols
-EB Link big-endian objects
-EL Link little-endian objects
-f SHLIB, --auxiliary SHLIB Auxiliary filter for shared object symbol
table
-F SHLIB, --filter SHLIB Filter for shared object symbol table
-g Ignored
-G SIZE, --gpsize SIZE Small data size (if no size, same as --shared)
-h FILENAME, -soname FILENAME
Set internal name of shared library
-l LIBNAME, --library LIBNAME
Search for library LIBNAME
-L DIRECTORY, --library-path DIRECTORY
Add DIRECTORY to library search path
-m EMULATION Set emulation
-M, --print-map Print map file on standard output
-n, --nmagic Do not page align data
-N, --omagic Do not page align data, do not make text
readonly
-o FILE, --output FILE Set output file name
-O Optimize output file
-Qy Ignored for SVR4 compatibility
-q, --emit-relocs Generate relocations in final output
-r, -i, --relocateable Generate relocateable output
-R FILE, --just-symbols FILE
Just link symbols (if directory, same
as --rpath)
-s, --strip-all Strip all symbols
-S, --strip-debug Strip debugging symbols
-t, --trace Trace file opens
-T FILE, --script FILE Read linker script
-u SYMBOL, --undefined SYMBOL
Start with undefined reference to SYMBOL
--unique Don't merge orphan sections with the same name
-Ur Build global constructor/destructor tables
-v, --version Print version information
-V Print version and emulation information
-x, --discard-all Discard all local symbols
-X, --discard-locals Discard temporary local symbols
-y SYMBOL, --trace-symbol SYMBOL
Trace mentions of SYMBOL
-Y PATH Default search path for Solaris compatibility
-(, --start-group Start a group
-), --end-group End a group
-assert KEYWORD Ignored for SunOS compatibility
-Bdynamic, -dy, -call_shared
Link against shared libraries
-Bstatic, -dn, -non_shared, -static
Do not link against shared libraries
-Bsymbolic Bind global references locally
--check-sections Check section addresses for overlaps (default)
--no-check-sections Do not check section addresses for overlaps
--cref Output cross reference table
--defsym SYMBOL=EXPRESSION Define a symbol
--demangle [=STYLE] Demangle symbol names [using STYLE]
--dynamic-linker PROGRAM Set the dynamic linker to use
--embedded-relocs Generate embedded relocs
-fini SYMBOL Call SYMBOL at unload-time
--force-exe-suffix Force generation of file with .exe suffix
--gc-sections Remove unused sections (on some targets)
--no-gc-sections Don't remove unused sections (default)
--help Print option help
-init SYMBOL Call SYMBOL at load-time
-Map FILE Write a map file
--no-demangle Do not demangle symbol names
--no-keep-memory Use less memory and more disk I/O
--no-undefined Allow no undefined symbols
--no-warn-mismatch Don't warn about mismatched input files
--no-whole-archive Turn off --whole-archive
--noinhibit-exec Create an output file even if errors occur
--oformat TARGET Specify target of output file
-qmagic Ignored for Linux compatibility
--relax Relax branches on certain targets
--retain-symbols-file FILE Keep only symbols listed in FILE
-rpath PATH Set runtime shared library search path
-rpath-link PATH Set link time shared library search path
-shared, -Bshareable Create a shared library
--sort-common Sort common symbols by size
--split-by-file [=SIZE] Split output sections every SIZE octets
--split-by-reloc [=COUNT] Split output sections every COUNT relocs
--stats Print memory usage statistics
--target-help Display target specific options
--task-link SYMBOL Do task level linking
--traditional-format Use same format as native linker
--section-start SECTION=ADDRESS
Set address of named section
-Tbss ADDRESS Set address of .bss section
-Tdata ADDRESS Set address of .data section
-Ttext ADDRESS Set address of .text section
--verbose Output lots of information during link
--version-script FILE Read version information script
--version-exports-section SYMBOL
Take export symbols list from .exports, using
SYMBOL as the version.
--warn-common Warn about duplicate common symbols
--warn-constructors Warn if global constructors/destructors are
seen
--warn-multiple-gp Warn if the multiple GP values are used
--warn-once Warn only once per undefined symbol
--warn-section-align Warn if start of section changes due to
alignment
--whole-archive Include all objects from following archives
--wrap SYMBOL Use wrapper functions for SYMBOL
--mpc860c0 [=WORDS] Modify problematic branches in last WORDS
(1-10,
default 5) words of a page
/usr/bin/ld: supported targets: pe-i386 pei-i386 elf32-i386 elf32-little
elf32-big srec symbolsrec tekhex binary ihex
/usr/bin/ld: supported emulations: i386pe
/usr/bin/ld: emulation specific options:
i386pe:
--base_file <basefile> Generate a base file for relocatable
DLLs
--dll Set image base to the default for DLLs
--file-alignment <size> Set file alignment
--heap <size> Set initial size of the heap
--image-base <address> Set start address of the executable
--major-image-version <number> Set version number of the executable
--major-os-version <number> Set minimum required OS version
--major-subsystem-version <number> Set minimum required OS subsystem
version
--minor-image-version <number> Set revision number of the executable
--minor-os-version <number> Set minimum required OS revision
--minor-subsystem-version <number> Set minimum required OS subsystem
revision
--section-alignment <size> Set section alignment
--stack <size> Set size of the initial stack
--subsystem <name>[:<version>] Set required OS subsystem [& version]
--support-old-code Support interworking with old code
--thumb-entry=<symbol> Set the entry point to be Thumb
<symbol>
--add-stdcall-alias Export symbols with and without @nn
--disable-stdcall-fixup Don't link _sym to _sym@nn
--enable-stdcall-fixup Link _sym to _sym@nn without warnings
--exclude-symbols sym,sym,... Exclude symbols from automatic export
--export-all-symbols Automatically export all globals to DLL
--kill-at Remove @nn from exported symbols
--out-implib <file> Generate import library
--output-def <file> Generate a .DEF file for the built DLL
--warn-duplicate-exports Warn about duplicate exports.
--compat-implib Create backward compatible import libs;
create __imp_<SYMBOL> as well.
--enable-auto-image-base Automatically choose image base for
DLLs
unless user specifies one
--disable-auto-image-base Do not auto-choose image base.
(default)
--dll-search-prefix=<string> When linking dynamically to a dll
witout an
importlib, use <string><basename>.dll
in preference to lib<basename>.dll
Report bugs to bug-gnu-utils@gnu.org
For bug reporting instructions, please see:
<URL:http://www.gnu.org/software/gcc/faq.html#bugreport>
bash-2.04$
------------------------------------------------------------------------
gcc -v --help in the gcc build directory. Note that the output for as is
from the target assembler
bash-2.04$ gcc -v --help
Reading specs from /usr/lib/gcc-lib/i686-pc-cygwin/2.95.2-5/specs
Usage: gcc [options] file...
Options:
--help Display this information
-dumpspecs Display all of the built in spec strings
-dumpversion Display the version of the compiler
-dumpmachine Display the compiler's target processor
-print-search-dirs Display the directories in the compiler's search
path
-print-libgcc-file-name Display the name of the compiler's companion
library
-print-file-name=<lib> Display the full path to library <lib>
-print-prog-name=<prog> Display the full path to compiler component
<prog>
-print-multi-directory Display the root directory for versions of libgcc
-print-multi-lib Display the mapping between command line options
and
multiple library search directories
-Wa,<options> Pass comma-separated <options> on to the
assembler
-Wp,<options> Pass comma-separated <options> on to the
preprocessor
-Wl,<options> Pass comma-separated <options> on to the linker
-Xlinker <arg> Pass <arg> on to the linker
-save-temps Do not delete intermediate files
-pipe Use pipes rather than intermediate files
-specs=<file> Override builtin specs with the contents of
<file>
-std=<standard> Assume that the input sources are for <standard>
-B <directory> Add <directory> to the compiler's search paths
-b <machine> Run gcc for target <machine>, if installed
-V <version> Run gcc version number <version>, if installed
-v Display the programs invoked by the compiler
-E Preprocess only; do not compile, assemble or link
-S Compile only; do not assemble or link
-c Compile and assemble, but do not link
-o <file> Place the output into <file>
-x <language> Specify the language of the following input files
Permissable languages include: c c++ assembler
none
'none' means revert to the default behaviour of
guessing the language based on the file's
extension
Options starting with -g, -f, -m, -O or -W are automatically passed on to
the various sub-processes invoked by gcc. In order to pass other options
on to these processes the -W<letter> options must be used.
gcc version 2.95.2-5 19991024 (cygwin experimental)
/usr/lib/gcc-lib/i686-pc-cygwin/2.95.2-5/cpp.exe -lang-c -v -D__GNUC__=2 -D_
_GNUC_MINOR__=95 -Di386 -D__386__ -D__i386 -D_X86=1 -D__STDC__=1 -D__stdcall
=__attribute__((__stdcall__)) -D__cdecl=__attribute__((__cdecl__)) -D__decls
pec(x)=__attribute__((x)) -D__i386__ -D__386__ -D__i386 -D_X86=1 -D__STDC__=
1 -D__stdcall=__attribute__((__stdcall__)) -D__cdecl=__attribute__((__cdecl_
_)) -D__declspec(x)=__attribute__((x)) -D__i386 -Asystem(winnt) -Acpu(i386)
-Amachine(i386) -remap -Acpu(i386) -Amachine(i386) -Di386 -D__i386 -D__i386_
_ -Di686 -Dpentiumpro -D__i686 -D__i686__ -D__pentiumpro -D__pentiumpro__ -D
__CYGWIN32__ -D__CYGWIN__ -Dunix -D__unix__ -D__unix -D_WIN32 -DWINNT -isyst
em /usr/include/w32api --help help-dummy /tmp/cchNWKYY.i
GNU CPP version 2.95.2-5 19991024 (cygwin experimental) (80386, BSD syntax)
Usage: cpp.exe [switches] input output
Switches:
-include <file> Include the contents of <file> before other
files
-imacros <file> Accept definition of marcos in <file>
-iprefix <path> Specify <path> as a prefix for next two options
-iwithprefix <dir> Add <dir> to the end of the system include paths
-iwithprefixbefore <dir> Add <dir> to the end of the main include paths
-isystem <dir> Add <dir> to the start of the system include
paths
-idirafter <dir> Add <dir> to the end of the system include paths
-I <dir> Add <dir> to the end of the main include paths
-nostdinc Do not search the system include directories
-nostdinc++ Do not search the system include directories for
C++
-o <file> Put output into <file>
-pedantic Issue all warnings demanded by strict ANSI C
-traditional Follow K&R pre-processor behaviour
-trigraphs Support ANSI C trigraphs
-lang-c Assume that the input sources are in C
-lang-c89 Assume that the input is C89; depricated
-lang-c++ Assume that the input sources are in C++
-lang-objc Assume that the input sources are in ObjectiveC
-lang-objc++ Assume that the input sources are in
ObjectiveC++
-lang-asm Assume that the input sources are in assembler
-lang-chill Assume that the input sources are in Chill
-std=<std name> Specify the conformance standard; one of:
gnu89, gnu9x, c89, c9x, iso9899:1990,
iso9899:199409, iso9899:199x
-+ Allow parsing of C++ style features
-w Inhibit warning messages
-Wtrigraphs Warn if trigraphs are encountered
-Wno-trigraphs Do not warn about trigraphs
-Wcomment{s} Warn if one comment starts inside another
-Wno-comment{s} Do not warn about comments
-Wtraditional Warn if a macro argument is/would be turned into
a string if -traditional is specified
-Wno-traditional Do not warn about stringification
-Wundef Warn if an undefined macro is used by #if
-Wno-undef Do not warn about testing undefined macros
-Wimport Warn about the use of the #import directive
-Wno-import Do not warn about the use of #import
-Werror Treat all warnings as errors
-Wno-error Do not treat warnings as errors
-Wall Enable all preprocessor warnings
-M Generate make dependencies
-MM As -M, but ignore system header files
-MD As -M, but put output in a .d file
-MMD As -MD, but ignore system header files
-MG Treat missing header file as generated files
-g Include #define and #undef directives in the
output
-D<macro> Define a <macro> with string '1' as its value
-D<macro>=<val> Define a <macro> with <val> as its value
-A<question> (<answer>) Assert the <answer> to <question>
-U<macro> Undefine <macro>
-u or -undef Do not predefine any macros
-v Display the version number
-H Print the name of header files as they are used
-C Do not discard comments
-dM Display a list of macro definitions active at
end
-dD Preserve macro definitions in output
-dN As -dD except that only the names are preserved
-dI Include #include directives in the output
-ifoutput Describe skipped code blocks in output
-P Do not generate #line directives
-$ Do not include '$' in identifiers
-remap Remap file names when including files.
-h or --help Display this information
/usr/lib/gcc-lib/i686-pc-cygwin/2.95.2-5/cc1.exe
/tmp/cchNWKYY.i -quiet -dumpbase help-dummy.c -version --help -o
/tmp/ccFciLi5.s
Usage: cc1.exe input [switches]
Switches:
-ffixed-<register> Mark <register> as being unavailable to the
compiler
-fcall-used-<register> Mark <register> as being corrupted by function
calls
-fcall-saved-<register> Mark <register> as being preserved across
functions
-finline-limit-<number> Limits the size of inlined functions to <number>
-fident Process #ident directives
-fleading-underscore External symbols have a leading underscore
-finstrument-functions Instrument function entry/exit with profiling
calls
-fdump-unnumbered Suppress output of instruction numbers and line
number notes in debugging dumps
-fprefix-function-name Add a prefix to all function names
-fcheck-memory-usage Generate code to check every memory access
-fstrict-aliasing Assume strict aliasing rules apply
-fargument-noalias-global Assume arguments do not alias each other or
globals
-fargument-noalias Assume arguments may alias globals but not each
other
-fargument-alias Specify that arguments may alias each other &
globals
-fstack-check Insert stack checking code into the program
-fgcc-struct Pack structure members using gcc default rules
-fnative-struct Pack structure members consistent with some other
(native) compiler
-fpack-struct Pack structure members together without holes
-foptimize-register-move Do the full regmove optimization pass
-fregmove Enables a register move optimisation
-fgnu-linker Output GNU ld formatted global initialisers
-fverbose-asm Add extra commentry to assembler output
-fdata-sections place data items into their own section
-ffunction-sections place each function into its own section
-finhibit-size-directive Do not generate .size directives
-fcommon Do not put unitialised globals in the common
section
-ffast-math Improve FP speed by violating ANSI & IEEE rules
-fbranch-probabilities Use profiling information for branch probabilities
-ftest-coverage Create data files needed by gcov
-fprofile-arcs Insert arc based program profiling code
-fasynchronous-exceptions Support asynchronous exceptions
-fsjlj-exceptions Use setjmp/longjmp to handle exceptions
-fnew-exceptions Use the new model for exception handling
-fexceptions Enable exception handling
-fpic Generate position independent code, if possible
-fbranch-count-reg Replace add,compare,branch with branch on count
reg
-fsched-spec-load-dangerous Allow speculative motion of more loads
-fsched-spec-load Allow speculative motion of some loads
-fsched-spec Allow speculative motion of non-loads
-fsched-interblock Enable scheduling across basic blocks
-fschedule-insns2 Run two passes of the instruction scheduler
-fschedule-insns Reschedule instructions to avoid pipeline stalls
-fpretend-float Pretend that host and target use the same FP
format
-frerun-loop-opt Run the loop optimiser twice
-frerun-cse-after-loop Run CSE pass after loop optimisations
-fgcse Perform the global common subexpression
elimination
-fdelayed-branch Attempt to fill delay slots of branch instructions
-freg-struct-return Return 'short' aggregates in registers
-fpcc-struct-return Return 'short' aggregates in memory, not registers
-fcaller-saves Enable saving registers around function calls
-fshared-data Mark data as shared rather than private
-fsyntax-only Check for syntax errors, then stop
-fkeep-static-consts Emit static const variables even if they are not
used
-finline Pay attention to the 'inline' keyword
-fkeep-inline-functions Generate code for funcs even if they are fully
inlined
-finline-functions Integrate simple functions into their callers
-ffunction-cse Allow function addresses to be held in registers
-fforce-addr Copy memory address constants into regs before
using
-fforce-mem Copy memory operands into registers before using
-fpeephole Enable machine specific peephole optimisations
-fwritable-strings Store strings in writable data section
-freduce-all-givs Strength reduce all loop general induction
variables
-fmove-all-movables Force all loop invariant computations out of loops
-funroll-all-loops Perform loop unrolling for all loops
-funroll-loops Perform loop unrolling when iteration count is
known
-fstrength-reduce Perform strength reduction optimisations
-fthread-jumps Perform jump threading optimisations
-fexpensive-optimizations Perform a number of minor, expensive
optimisations
-fcse-skip-blocks When running CSE, follow conditional jumps
-fcse-follow-jumps When running CSE, follow jumps to their targets
-fomit-frame-pointer When possible do not generate stack frames
-fdefer-pop Defer popping functions args from stack until
later
-fvolatile-static Consider all mem refs to static data to be
volatile
-fvolatile-global Consider all mem refs to global data to be
volatile
-fvolatile Consider all mem refs through pointers as volatile
-ffloat-store Do not store floats in registers
-O[number] Set optimisation level to [number]
-Os Optimise for space rather than speed
-pedantic Issue warnings needed by strict compliance to ANSI
C
-pedantic-errors Like -pedantic except that errors are produced
-w Suppress warnings
-W Enable extra warnings
-Winline Warn when an inlined function cannot be inlined
-Wuninitialized Warn about unitialized automatic variables
-Wcast-align Warn about pointer casts which increase alignment
-Waggregate-return Warn about returning structures, unions or arrays
-Wswitch Warn about enumerated switches missing a specific
case
-Wshadow Warn when one local variable shadows another
-Wunused Warn when a variable is unused
-Wid-clash-<num> Warn if 2 identifiers have the same first <num>
chars
-Wlarger-than-<number> Warn if an object is larger than <number> bytes
-p Enable function profiling
-a Enable block profiling
-ax Enable jump profiling
-o <file> Place output into <file>
-G <number> Put global and static data smaller than <number>
bytes into a special section (on some targets)
-gcoff Generate COFF format debug output
-gstabs+ Generate extended STABS format debug output
-gstabs Generate STABS format debug output
-ggdb Generate default extended debug format output
-g Generate default debug format output
-aux-info <file> Emit declaration info into <file>.X
-quiet Do not display functions compiled or elapsed time
-version Display the compiler's version
-d[letters] Enable dumps from specific passes of the compiler
-dumpbase <file> Base name to be used for dumps from specific
passes
-sched-verbose-<number> Set the verbosity level of the scheduler
--help Display this information
Language specific options:
-ansi Compile just for ANSI C
-fallow-single-precisio Do not promote floats to double if
using -traditional
-std= Determine language standard
-funsigned-bitfields Make bitfields by unsigned by default
-fsigned-char Make 'char' be signed by default
-funsigned-char Make 'char' be unsigned by default
-traditional Attempt to support traditional K&R style C
-fno-asm Do not recognise the 'asm' keyword
-fno-builtin Do not recognise any built in functions
-fhosted Assume normal C execution environment
-ffreestanding Assume that standard libraries & main might not
exist
-fcond-mismatch Allow different types as args of ? operator
-fdollars-in-identifier Allow the use of $ inside identifiers
-fshort-double Use the same size for double as for float
-fshort-enums Use the smallest fitting integer to hold enums
-Wall Enable most warning messages
-Wbad-function-cast Warn about casting functions to incompatible types
-Wmissing-noreturn Warn about functions which might be candidates for
attribute noreturn
-Wcast-qual Warn about casts which discard qualifiers
-Wchar-subscripts Warn about subscripts whose type is 'char'
-Wcomment Warn if nested comments are detected
-Wcomments Warn if nested comments are detected
-Wconversion Warn about possibly confusing type conversions
-Wformat Warn about printf format anomalies
-Wimplicit-function-dec Warn about implicit function declarations
-Wimplicit-int Warn when a declaration does not specify a type
-Wimport Warn about the use of the #import directive
-Wno-long-long Do not warn about using 'long long' when -pedantic
-Wmain Warn about suspicious declarations of main
-Wmissing-braces Warn about possibly missing braces around
initialisers
-Wmissing-declarations Warn about global funcs without previous
declarations
-Wmissing-prototypes Warn about global funcs without prototypes
-Wmultichar Warn about use of multicharacter literals
-Wnested-externs Warn about externs not at file scope level
-Wparentheses Warn about possible missing parentheses
-Wpointer-arith Warn about function pointer arithmetic
-Wredundant-decls Warn about multiple declarations of the same
object
-Wsign-compare Warn about signed/unsigned comparisons
-Wunknown-pragmas Warn about unrecognised pragmas
-Wstrict-prototypes Warn about non-prototyped function decls
-Wtraditional Warn about constructs whose meaning change in ANSI
C
-Wtrigraphs Warn when trigraphs are encountered
-Wwrite-strings Mark strings as 'const char *'
Options for Objective C:
-gen-decls Dump decls to a .decl file
-fgnu-runtime Generate code for GNU runtime environment
-fnext-runtime Generate code for NeXT runtime environment
-Wselector Warn if a selector has multiple methods
-Wno-protocol Do not warn if inherited methods are unimplemented
-print-objc-runtime-inf Generate C header of platform specific features
Options for C++:
-fno-access-control Do not obey access control semantics
-fall-virtual Make all member functions virtual
-falt-external-template Change when template instances are emitted
-fcheck-new Check the return value of new
-fconserve-space Reduce size of object files
-fno-const-strings Make string literals `char[]' instead of `const
char[]'
-fno-default-inline Do not inline member functions by default
-fno-rtti Do not generate run time type descriptor
information
-fno-for-scope Scope of for-init-statement vars extends outside
-fguiding-decls Implement guiding declarations
-fno-gnu-keywords Do not recognise GNU defined keywords
-fhandle-signatures Handle signature language constructs
-fhonor-std Treat the namespace `std' as a normal namespace
-fhuge-objects Enable support for huge objects
-fno-implement-inlines Export functions even if they can be inlined
-fno-implicit-templates Only emit explicit template instatiations
-fno-implicit-inline-te Only emit explicit instatiations of inline
templates
-finit-priority Handle the init_priority attribute
-flabels-ok Labels can be used as first class objects
-fnew-abi Enable experimental ABI changes
-fno-nonnull-objects Do not assume that a reference is always valid
-foperator-names Recognise and/bitand/bitor/compl/not/or/xor
-fno-optional-diags Disable optional diagnostics
-fpermissive Downgrade conformance errors to warnings
-frepo Enable automatic template instantiation
-fsquangle Enable squashed name mangling
-fstats Display statistics accumulated during compilation
-fno-strict-prototype Do not assume that empty prototype means no args
-ftemplate-depth- Specify maximum template instantiation depth
-fthis-is-variable Make 'this' not be type '* const'
-fvtable-gc Discard unused virtual functions
-fvtable-thunks Implement vtables using thunks
-fweak Emit common-like symbols as weak symbols
-fxref Emit cross referencing information
-Wreturn-type Warn about inconsistent return types
-Woverloaded-virtual Warn about overloaded virtual function names
-Wno-ctor-dtor-privacy Don't warn when all ctors/dtors are private
-Wnon-virtual-dtor Warn about non virtual destructors
-Wextern-inline Warn when a function is declared extern, then
inline
-Wreorder Warn when the compiler reorders code
-Wsynth Warn when synthesis behaviour differs from Cfront
-Wno-pmf-conversions Don't warn when type converting pointers to member
functions
-Weffc++ Warn about violations of Effective C++ style rules
-Wsign-promo Warn when overload promotes from unsigned to
signed
-Wold-style-cast Warn if a C style cast is used in a program
-Wno-non-template-frien Don't warn when non-templatized friend functions
are declared within a template
-Wno-deprecated Don't announce deprecation of compiler features
Options for Fortran:
-fversion Print g77-specific compiler version info, run
internal tests
-ff66 Program is written in typical FORTRAN 66 dialect
-ff77 Program is written in typical Unix f77 dialect
-fno-f77 Program does not use Unix-f77 dialectal features
-ff90 Program is written in Fortran-90-ish dialect
-fno-automatic Treat local vars and COMMON blocks as if they were
named in SAVE statements
-fdollar-ok Allow $ in symbol names
-fno-f2c f2c-compatible code need not be generated
-fno-f2c-library Unsupported; do not generate libf2c-calling code
-fflatten-arrays Unsupported; affects code-generation of arrays
-ffree-form Program is written in Fortran-90-ish free form
-fpedantic Warn about use of (only a few for now) Fortran
extensions
-fvxt Program is written in VXT (Digital-like) FORTRAN
-fno-ugly Disallow all ugly features
-fno-ugly-args Hollerith and typeless constants not passed as
arguments
-fugly-assign Allow ordinary copying of ASSIGN'ed vars
-fugly-assumed Dummy array dimensioned to (1) is assumed-size
-fugly-comma Trailing comma in procedure call denotes null
argument
-fugly-complex Allow REAL(Z) and AIMAG(Z) given DOUBLE COMPLEX Z
-fno-ugly-init Initialization via DATA and PARAMETER is
type-compatible
-fugly-logint Allow INTEGER and LOGICAL interchangeability
-fxyzzy Print internal debugging-related info
-finit-local-zero Initialize local vars and arrays to zero
-fno-backslash Backslashes in character/hollerith constants not
special (C-style)
-femulate-complex Have front end emulate COMPLEX arithmetic to avoid
bugs
-fno-underscoring Disable the appending of underscores to externals
-fno-second-underscore Never append a second underscore to externals
-fintrin-case-initcap Intrinsics spelled as e.g. SqRt
-fintrin-case-upper Intrinsics in uppercase
-fintrin-case-any Intrinsics letters in arbitrary cases
-fmatch-case-initcap Language keywords spelled as e.g. IOStat
-fmatch-case-upper Language keywords in uppercase
-fmatch-case-any Language keyword letters in arbitrary cases
-fsource-case-upper Internally convert most source to uppercase
-fsource-case-preserve Internally preserve source case
-fsymbol-case-initcap Symbol names spelled in mixed case
-fsymbol-case-upper Symbol names in uppercase
-fsymbol-case-lower Symbol names in lowercase
-fcase-strict-upper Program written in uppercase
-fcase-strict-lower Program written in lowercase
-fcase-initcap Program written in strict mixed-case
-fcase-upper Compile as if program written in uppercase
-fcase-lower Compile as if program written in lowercase
-fcase-preserve Preserve all spelling (case) used in program
-fbadu77-intrinsics-del Delete libU77 intrinsics with bad interfaces
-fbadu77-intrinsics-dis Disable libU77 intrinsics with bad interfaces
-fbadu77-intrinsics-hid Hide libU77 intrinsics with bad interfaces
-ff2c-intrinsics-delete Delete non-FORTRAN-77 intrinsics f2c supports
-ff2c-intrinsics-disabl Disable non-FORTRAN-77 intrinsics f2c supports
-ff2c-intrinsics-hide Hide non-FORTRAN-77 intrinsics f2c supports
-ff90-intrinsics-delete Delete non-FORTRAN-77 intrinsics F90 supports
-ff90-intrinsics-disabl Disable non-FORTRAN-77 intrinsics F90 supports
-ff90-intrinsics-hide Hide non-FORTRAN-77 intrinsics F90 supports
-fgnu-intrinsics-delete Delete non-FORTRAN-77 intrinsics g77 supports
-fgnu-intrinsics-disabl Disable non-FORTRAN 77 intrinsics F90 supports
-fgnu-intrinsics-hide Hide non-FORTRAN 77 intrinsics F90 supports
-fmil-intrinsics-delete Delete MIL-STD 1753 intrinsics
-fmil-intrinsics-disabl Disable MIL-STD 1753 intrinsics
-fmil-intrinsics-hide Hide MIL-STD 1753 intrinsics
-funix-intrinsics-delet Delete libU77 intrinsics
-funix-intrinsics-disab Disable libU77 intrinsics
-funix-intrinsics-hide Hide libU77 intrinsics
-fvxt-intrinsics-delete Delete non-FORTRAN-77 intrinsics VXT FORTRAN
supports
-fvxt-intrinsics-disabl Disable non-FORTRAN-77 intrinsics VXT FORTRAN
supports
-fvxt-intrinsics-hide Hide non-FORTRAN-77 intrinsics VXT FORTRAN
supports
-fzeros Treat initial values of 0 like non-zero values
-fdebug-kludge Emit special debugging information for COMMON and
EQUIVALENCE
-fonetrip Take at least one trip through each iterative DO
loop
-fno-silent Print names of program units as they are compiled
-fno-globals Disable fatal diagnostics about inter-procedural
problems
-ftypeless-boz Make prefix-radix non-decimal constants be
typeless
-fbounds-check Generate code to check subscript and substring
bounds
-ffortran-bounds-check Fortran-specific form of -fbounds-check
-Wno-globals Disable warnings about inter-procedural problems
-Wsurprising Warn about constructs with surprising meanings
-I Add a directory for INCLUDE searching
-ffixed-line-length- Set the maximum line length
Options for Java:
-fno-bounds-check Disable automatic array bounds checking
-fassume-compiled Make is_compiled_class return 1
-femit-class-files Dump class files to <name>.class
-MD Print dependencies to FILE.d
-MMD Print dependencies to FILE.d
-M Print dependencies to stdout
-MM Print dependencies to stdout
-fclasspath Set class path and suppress system path
-fCLASSPATH Set class path
-I Add directory to class path
-foutput-class-dir Directory where class files should be written
-Wredundant-modifiers Warn if modifiers are specified when not necessary
-Wunsupported-jdk11 Warn if `final' local variables are specified
Target specific options:
-mthreads Use Mingw-specific thread support
-mnop-fun-dllimport Ignore dllimport for functions
-mdll Generate code for a DLL
-mconsole Create console application
-mno-win32 Don't set Windows defines
-mwindows Create GUI application
-mno-cygwin Use the Mingw32 interface
-mcygwin Use the Cygwin interface
-mstack-arg-probe Enable stack probing
-mno-move Don't generate mem-mem moves
-mmove Generate mem-mem moves
-mschedule-prologue Schedule function prologues
-mwide-multiply multiplies of 32 bits are 64 bits
-mno-wide-multiply multiplies of 32 bits constrained to 32 bits
-momit-leaf-frame-point Omit the frame pointer in leaf functions
-mfancy-math-387 Generate sin, cos, sqrt for FPU
-mno-fancy-math-387 Do not generate sin, cos, sqrt for 387
-mno-fp-ret-in-387 Do not return values of functions in FPU registers
-mfp-ret-in-387 Return values of functions in FPU registers
-mno-ieee-fp Do not use IEEE math for fp comparisons
-mieee-fp Use IEEE math for fp comparisons
-mno-svr3-shlib Uninitialized locals in .data
-msvr3-shlib Uninitialized locals in .bss
-mno-align-double Align doubles on word boundary
-malign-double Align some doubles on dword boundary
-mno-rtd Use normal calling convention
-mrtd Alternate calling convention
-mpentiumpro Same as -mcpu=pentiumpro
-mpentium Same as -mcpu=pentium
-m486 Same as -mcpu=i486
-m386 Same as -mcpu=i386
-mno-soft-float Use hardware fp
-msoft-float Do not use hardware fp
-mhard-float Use hardware fp
-mno-80387 Do not use hardware fp
-m80387 Use hardware fp
-mbranch-cost= Branches are this expensive (1-5, arbitrary units)
-mpreferred-stack-bound Attempt to keep stack aligned to this power of 2
-malign-functions= Function starts are aligned to this power of 2
-malign-jumps= Jump targets are aligned to this power of 2
-malign-loops= Loop code aligned to this power of 2
-mregparm= Number of registers used to pass integer arguments
-mreg-alloc= Control allocation order of integer registers
-march= Generate code for given CPU
-mcpu= Schedule code for given CPU
There are undocumented target specific options as well.
as --help -o /tmp/ccOP4l7T.o /tmp/ccFciLi5.s
Usage: as [option...] [asmfile...]
Options:
-a[sub-option...] turn on listings
Sub-options [default hls]:
c omit false conditionals
d omit debugging directives
h include high-level source
l include assembly
m include macro expansions
n omit forms processing
s include symbols
=file set listing file name (must be last sub-option)
-D produce assembler debugging messages
--defsym SYM=VAL define symbol SYM to given value
-f skip whitespace and comment preprocessing
--gstabs generate stabs debugging information
--help show this message and exit
-I DIR add DIR to search list for .include directives
-J don't warn about signed overflow
-K warn when differences altered for long displacements
-L keep local symbols (starting with `L')
-M,--mri assemble in MRI compatibility mode
--MD FILE write dependency information in FILE (default none)
-nocpp ignored
-o OBJFILE name the object-file output OBJFILE (default a.out)
-R fold data section into text section
--statistics print various measured statistics from execution
--version print assembler version number and exit
-W suppress warnings
--itbl INSTTBL extend instruction set to include instructions
matching the specifications defined in file INSTTBL
-w ignored
-X ignored
-Z generate object file even after errors
Z8K options:
-z8001 generate segmented code
-z8002 generate unsegmented code
Report bugs to bug-gnu-utils@prep.ai.mit.edu
/usr/lib/gcc-lib/i686-pc-cygwin/2.95.2-5/collect2.exe -Bdynamic --help
/usr/lib/crt0.o -L/usr/lib/gcc-lib/i686-pc-cygwin/2.95.2-5 -L/usr/lib/mingw
/tmp/ccOP4l7T.o -lgcc -lcygwin -luser32 -lkernel32 -ladvapi32 -lshell32 -lgc
c
Usage: /usr/bin/ld [options] file...
Options:
-a KEYWORD Shared library control for HP/UX compatibility
-A ARCH, --architecture ARCH
Set architecture
-b TARGET, --format TARGET Specify target for following input files
-c FILE, --mri-script FILE Read MRI format linker script
-d, -dc, -dp Force common symbols to be defined
-e ADDRESS, --entry ADDRESS Set start address
-E, --export-dynamic Export all dynamic symbols
-EB Link big-endian objects
-EL Link little-endian objects
-f SHLIB, --auxiliary SHLIB Auxiliary filter for shared object symbol
table
-F SHLIB, --filter SHLIB Filter for shared object symbol table
-g Ignored
-G SIZE, --gpsize SIZE Small data size (if no size, same as --shared)
-h FILENAME, -soname FILENAME
Set internal name of shared library
-l LIBNAME, --library LIBNAME
Search for library LIBNAME
-L DIRECTORY, --library-path DIRECTORY
Add DIRECTORY to library search path
-m EMULATION Set emulation
-M, --print-map Print map file on standard output
-n, --nmagic Do not page align data
-N, --omagic Do not page align data, do not make text
readonly
-o FILE, --output FILE Set output file name
-O Optimize output file
-Qy Ignored for SVR4 compatibility
-q, --emit-relocs Generate relocations in final output
-r, -i, --relocateable Generate relocateable output
-R FILE, --just-symbols FILE
Just link symbols (if directory, same
as --rpath)
-s, --strip-all Strip all symbols
-S, --strip-debug Strip debugging symbols
-t, --trace Trace file opens
-T FILE, --script FILE Read linker script
-u SYMBOL, --undefined SYMBOL
Start with undefined reference to SYMBOL
--unique Don't merge orphan sections with the same name
-Ur Build global constructor/destructor tables
-v, --version Print version information
-V Print version and emulation information
-x, --discard-all Discard all local symbols
-X, --discard-locals Discard temporary local symbols
-y SYMBOL, --trace-symbol SYMBOL
Trace mentions of SYMBOL
-Y PATH Default search path for Solaris compatibility
-(, --start-group Start a group
-), --end-group End a group
-assert KEYWORD Ignored for SunOS compatibility
-Bdynamic, -dy, -call_shared
Link against shared libraries
-Bstatic, -dn, -non_shared, -static
Do not link against shared libraries
-Bsymbolic Bind global references locally
--check-sections Check section addresses for overlaps (default)
--no-check-sections Do not check section addresses for overlaps
--cref Output cross reference table
--defsym SYMBOL=EXPRESSION Define a symbol
--demangle [=STYLE] Demangle symbol names [using STYLE]
--dynamic-linker PROGRAM Set the dynamic linker to use
--embedded-relocs Generate embedded relocs
-fini SYMBOL Call SYMBOL at unload-time
--force-exe-suffix Force generation of file with .exe suffix
--gc-sections Remove unused sections (on some targets)
--no-gc-sections Don't remove unused sections (default)
--help Print option help
-init SYMBOL Call SYMBOL at load-time
-Map FILE Write a map file
--no-demangle Do not demangle symbol names
--no-keep-memory Use less memory and more disk I/O
--no-undefined Allow no undefined symbols
--no-warn-mismatch Don't warn about mismatched input files
--no-whole-archive Turn off --whole-archive
--noinhibit-exec Create an output file even if errors occur
--oformat TARGET Specify target of output file
-qmagic Ignored for Linux compatibility
--relax Relax branches on certain targets
--retain-symbols-file FILE Keep only symbols listed in FILE
-rpath PATH Set runtime shared library search path
-rpath-link PATH Set link time shared library search path
-shared, -Bshareable Create a shared library
--sort-common Sort common symbols by size
--split-by-file [=SIZE] Split output sections every SIZE octets
--split-by-reloc [=COUNT] Split output sections every COUNT relocs
--stats Print memory usage statistics
--target-help Display target specific options
--task-link SYMBOL Do task level linking
--traditional-format Use same format as native linker
--section-start SECTION=ADDRESS
Set address of named section
-Tbss ADDRESS Set address of .bss section
-Tdata ADDRESS Set address of .data section
-Ttext ADDRESS Set address of .text section
--verbose Output lots of information during link
--version-script FILE Read version information script
--version-exports-section SYMBOL
Take export symbols list from .exports, using
SYMBOL as the version.
--warn-common Warn about duplicate common symbols
--warn-constructors Warn if global constructors/destructors are
seen
--warn-multiple-gp Warn if the multiple GP values are used
--warn-once Warn only once per undefined symbol
--warn-section-align Warn if start of section changes due to
alignment
--whole-archive Include all objects from following archives
--wrap SYMBOL Use wrapper functions for SYMBOL
--mpc860c0 [=WORDS] Modify problematic branches in last WORDS
(1-10,
default 5) words of a page
/usr/bin/ld: supported targets: pe-i386 pei-i386 elf32-i386 elf32-little
elf32-big srec symbolsrec tekhex binary ihex
/usr/bin/ld: supported emulations: i386pe
/usr/bin/ld: emulation specific options:
i386pe:
--base_file <basefile> Generate a base file for relocatable
DLLs
--dll Set image base to the default for DLLs
--file-alignment <size> Set file alignment
--heap <size> Set initial size of the heap
--image-base <address> Set start address of the executable
--major-image-version <number> Set version number of the executable
--major-os-version <number> Set minimum required OS version
--major-subsystem-version <number> Set minimum required OS subsystem
version
--minor-image-version <number> Set revision number of the executable
--minor-os-version <number> Set minimum required OS revision
--minor-subsystem-version <number> Set minimum required OS subsystem
revision
--section-alignment <size> Set section alignment
--stack <size> Set size of the initial stack
--subsystem <name>[:<version>] Set required OS subsystem [& version]
--support-old-code Support interworking with old code
--thumb-entry=<symbol> Set the entry point to be Thumb
<symbol>
--add-stdcall-alias Export symbols with and without @nn
--disable-stdcall-fixup Don't link _sym to _sym@nn
--enable-stdcall-fixup Link _sym to _sym@nn without warnings
--exclude-symbols sym,sym,... Exclude symbols from automatic export
--export-all-symbols Automatically export all globals to DLL
--kill-at Remove @nn from exported symbols
--out-implib <file> Generate import library
--output-def <file> Generate a .DEF file for the built DLL
--warn-duplicate-exports Warn about duplicate exports.
--compat-implib Create backward compatible import libs;
create __imp_<SYMBOL> as well.
--enable-auto-image-base Automatically choose image base for
DLLs
unless user specifies one
--disable-auto-image-base Do not auto-choose image base.
(default)
--dll-search-prefix=<string> When linking dynamically to a dll
witout an
importlib, use <string><basename>.dll
in preference to lib<basename>.dll
Report bugs to bug-gnu-utils@gnu.org
For bug reporting instructions, please see:
<URL:http://www.gnu.org/software/gcc/faq.html#bugreport>
bash-2.04$
--
Want to unsubscribe from this list?
Send a message to cygwin-unsubscribe@sourceware.cygnus.com