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Re: specs file for gcc-2.95.2-7 and -mno-cygwin


On Mon, Feb 05, 2001 at 06:55:13PM +0000, Prof Brian D Ripley wrote:
>I believe there are several problems in using gcc-2.95.2-7.tar.gz with
>mingw-20010130-1.tar.gz (the latest on the mirror I use), and I will append
>a patch to the specs file which addresses these.
>
>1) mingw-20010130-1.tar.gz unpacks into /usr/include/mingw32, but the
>   specs file has `mingw' in several places.  I've assumed the specs file
>   is the wrong one here.

The only ming32 that I see in mingw-20010130-1.tar.gz is libmingw32.a.
Earnie, do you want to change the name of this file?

>2) The mingw(32) files are selected by -idirafter, and so come after
>   those in /usr/lib/gcc-lib/i686-pc-cygwin/2.95.2-7/include in the
>   system include path.  This is wrong at least in the case of
>   float.h, where the mingw version must take precedence.  Maybe
>   -isystem /usr/local/include/mingw was just a mistake.

Nope.  The isystem was just to get the include order correct.  It is
a recent addition.

>3) The -mno-cygwin build is now targeted at msvcrt.dll (good).
>   However, the mingw header files default to target crtdll.dll
>   unless __MSVCRT__ is set, and it has not been.

I don't know how this happened but Earnie did supply me with patches
that did this.  My cross-compilation environment somehow screwed up.

If you remove the specs file and do a 'gcc -dumpspecs', you'll see a
different configuration.

>4) `*mingw_include_path: i686-pc-cygwin'  seems out of date : the
>   mingw include files are no longer installed there.

I'm not sure how this is even used.  Can someone enlighten me?

>5) I rather suspect from the header files that __MINGW32__ should be
>   0.3 not 0.2.

That was a fallout of 3) above.
>
>I usually use the real mingw compilers to compile the GNU R project
>(http://www.r-project.org) but a user complained that it no longer
>compiled under cygwin, which led me to investigate this.
>
>I have not attempted to sort out the g++ header file paths, as
>without a mingw version of libstdc++ (AFAICS) there is little
>mileage in compiling C++ under -mno-cygwin, and I don't have need of it.

Could you possibly break out this diff into separate lines so that I can
see what's changed?

cgf

>diff -u follows:
>--- specs.orig	Tue Jan 30 21:38:32 2001
>+++ specs	Sat Feb  3 18:22:32 2001
>@@ -5,7 +5,7 @@
>
>
> *cpp:
>--remap %(cpp_cpu) %{posix:-D_POSIX_SOURCE}   %{!mno-cygwin:-D__CYGWIN32__ -D__CYGWIN__ -Dunix -D__unix__ -D__unix     -isystem /usr/local/include     -idirafter /usr/include}   %{mno-win32: %{mno-cygwin: %emno-cygwin and mno-win32 are not compatible}}   %{mno-cygwin:-DWIN32 -D__WIN32__ -D__MINGW32__=0.2     %{mthreads:-D_MT}     -isystem /usr/local/include/mingw     -idirafter /usr/include/mingw     -iwithprefixbefore ../../../../mingw/include/g++-3     -iwithprefixbefore ../../../../mingw/include     -iwithprefixbefore ../../../../mingw32/include/g++-3     -iwithprefixbefore ../../../../mingw32/include }    %{mwin32:-DWIN32 -D_WIN32 -D__WIN32 -D__WIN32__ -DWINNT      -idirafter /usr/include/w32api}
>+-remap %(cpp_cpu) %{posix:-D_POSIX_SOURCE}   %{!mno-cygwin:-D__CYGWIN32__ -D__CYGWIN__ -Dunix -D__unix__ -D__unix     -isystem /usr/local/include     -idirafter /usr/include}   %{mno-win32: %{mno-cygwin: %emno-cygwin and mno-win32 are not compatible}}   %{mno-cygwin:-DWIN32 -D__WIN32__ -D__MINGW32__=0.3  -D__MSVCRT__   %{mthreads:-D_MT}     -isystem /usr/include/mingw32     -idirafter /usr/include/mingw32     -iwithprefixbefore ../../../../mingw32/include/g++-3     -iwithprefixbefore ../../../../mingw32/include     -iwithprefixbefore ../../../../mingw32/include/g++-3     -iwithprefixbefore ../../../../mingw32/include }    %{mwin32:-DWIN32 -D_WIN32 -D__WIN32 -D__WIN32__ -DWINNT      -idirafter /usr/include/w32api}
>
> *cc1:
> %(cc1_spec)
>@@ -80,7 +80,7 @@
> %{!mcpu*: %{m386:-mcpu=i386 -march=i386} %{m486:-mcpu=i486 -march=i486} %{mpentium:-mcpu=pentium} %{mpentiumpro:-mcpu=pentiumpro}}
>
> *mingw_include_path:
>-i686-pc-cygwin
>+
>
> *link_command:
> %{!fsyntax-only:  %{!c:%{!M:%{!MM:%{!E:%{!S:%(linker) %l %X %{o*} %{A} %{d} %{e*} %{m} %{N} %{n} 			%{r} %{s} %{t} %{u*} %{x} %{z} %{Z}			%{!A:%{!nostdlib:%{!nostartfiles:%S}}}			%{static:} %{L*} %D %o			%{!nostdlib:%{!nodefaultlibs:%G %L %G}}			%{!A:%{!nostdlib:%{!nostartfiles:%E}}}			%{T*}
>
>
>-- 
>Brian D. Ripley,                  ripley@stats.ox.ac.uk
>Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
>University of Oxford,             Tel:  +44 1865 272861 (self)
>1 South Parks Road,                     +44 1865 272860 (secr)
>Oxford OX1 3TG, UK                Fax:  +44 1865 272595
>
>
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-- 
cgf@cygnus.com                        Red Hat, Inc.
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