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Finding the SONAME for bzip2
- From: Al <oss dot elmar at googlemail dot com>
- To: cygwin at cygwin dot com
- Date: Wed, 13 Oct 2010 17:15:45 +0200
- Subject: Finding the SONAME for bzip2
Hello,
I want to adapt the Makefile of bzip2 for cygwin and I want to
understand enough of what I am doing.
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)
$(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
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