This is the mail archive of the cygwin mailing list for the Cygwin project.


Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]
Other format: [Raw text]

R: Finding the SONAME for bzip2


--- Mer 13/10/10, Al  ha scritto:

> Hello,
> 
> I want to adapt the Makefile of bzip2 for cygwin and I want
> to
> understand enough of what I am doing.

have you checked the bzip2 source package for cygwin ?
I presume the mantainer already solved it

> 
> This are the lines of interest from the Linux Makefile:
> 
> BIGFILES=-D_FILE_OFFSET_BITS=64
> CFLAGS+=-fpic -fPIC -Wall -Winline $(BIGFILES)
> SOEXT=so
> SONAME=libbz2.${SOEXT}.1
> SOLDFLAGS=-shared -Wl,-soname -Wl,$(SONAME)
> 
> $(CC) $(LDFLAGS) $(SOLDFLAGS) -o libbz2.${SOEXT}.1.0.5
> $(OBJS)

usually we should have
             -o cygbz2-1.dll

(as you can see on libbz2_1 package)

as the version is before the .dll
due to some windows limitations ;-)

> $(CC) $(LDFLAGS) $(CFLAGS) -o bzip2-shared bzip2.c
> libbz2.${SOEXT}.1.0.5
> 
> 
> What would by the appropriate adaption for Cygwin?
> 
> I would try with this as a bare minimum, but then I loose
> all the versioning:
> 
> CFLAGS+=-Wall
> SONAME=
> SOLDFLAGS=-shared
> 
> $(CC) $(LDFLAGS) $(SOLDFLAGS) -o cygbz2.dll $(OBJS)
> $(CC) $(LDFLAGS) $(CFLAGS) -o bzip2-shared bzip2.c
> cygbz2.dll
> 
> Then the cygwin doc [1] suggests some other flags but no
> soname at all:
> 
> gcc -shared -o cyg${module}.dll \
> ? ? -Wl,--out-implib=lib${module}.dll.a \
> ? ? -Wl,--export-all-symbols \
> ? ? -Wl,--enable-auto-import \
> ? ? -Wl,--whole-archive ${old_libs} \
> ? ? -Wl,--no-whole-archive ${dependency_libs}
> 
> Al
> 
> [1] http://www.cygwin.com/cygwin-ug-net/dll.html
> 






--
Problem reports:       http://cygwin.com/problems.html
FAQ:                   http://cygwin.com/faq/
Documentation:         http://cygwin.com/docs.html
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple


Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]