The VideoLAN Forums

Posted: **12 Jan 2009 03:41**

I'm receiving the following error in Ubuntu when performing a cross-compile for Win32 using 0.9.8a sources:
libtool: link: i586-mingw32msvc-gcc -std=gnu99 -shared .libs/libmod_plugin_la-mod.o -L/usr/win32/lib /usr/win32/lib/libmodplug.a /usr/lib/gcc/i586-mingw32msvc/4.2.1-sjlj/libstdc++.a -L/build/buildd/mingw32-4.2.1.dfsg/build_dir/objs/i586-mingw32msvc/libstdc++-v3/src -L/build/buildd/mingw32-4.2.1.dfsg/build_dir/objs/i586-mingw32msvc/libstdc++-v3/src/.libs -L/build/buildd/mingw32-4.2.1.dfsg/build_dir/objs/i586-mingw32msvc/winsup/mingw -L/build/buildd/mingw32-4.2.1.dfsg/build_dir/objs/i586-mingw32msvc/winsup/w32api/lib -L/build/buildd/mingw32-4.2.1.dfsg/build_dir/objs/./gcc -L/usr/i586-mingw32msvc/bin -L/usr/i586-mingw32msvc/lib -L/usr/lib/gcc/../../i586-mingw32msvc/lib -lm -luser32 -ladvapi32 -lshell32 -lgcc_s -lgcc -lmoldname -lmingwex -lmsvcrt ../../src/.libs/libvlccore.dll.a -lkernel32 -lws2_32 -lnetapi32 -lwinmm /usr/win32/lib/libiconv.a -lmingw32 -mtune=pentium2 -mms-bitfields -o .libs/libmod_plugin.dll -Wl,--enable-auto-image-base -Xlinker --out-implib -Xlinker .libs/libmod_plugin.dll.a
/usr/lib/gcc/i586-mingw32msvc/4.2.1-sjlj/../../../../i586-mingw32msvc/bin/ld: cannot find -lgcc_s
collect2: ld returned 1 exit status
make[5]: *** [libmod_plugin.la] Error 1
make[5]: Leaving directory `/home/sgraves/Desktop/vlc-0.9.8a/modules/demux'
make[4]: *** [all-recursive] Error 1
make[4]: Leaving directory `/home/sgraves/Desktop/vlc-0.9.8a/modules/demux'
make[3]: *** [all] Error 2
make[3]: Leaving directory `/home/sgraves/Desktop/vlc-0.9.8a/modules/demux'
make[2]: *** [all-recursive] Error 1
make[2]: Leaving directory `/home/sgraves/Desktop/vlc-0.9.8a/modules'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/home/sgraves/Desktop/vlc-0.9.8a'
make: *** [all] Error 2

Any assistance would be appreciated.

Posted: **12 Jan 2009 20:12**

I've temporarily disabled mod support (--disable-mod) and was able to compile. I'm trying to track down the dependency on gcc_s.

Posted: **12 Jan 2009 20:41**

I am interested on the answer too.

Posted: **12 Jan 2009 21:54**

Getting a little further. The -lgcc_s is coming from $(AM_LDFLAGS). I removed this entry from the generated Makefile in 'modules/demux' for libmod and was able to compile.

From modules/demux/Makefile:
libmod_plugin_la_LINK = $(LIBTOOL) --tag=CC $(AM_LIBTOOLFLAGS) \
$(LIBTOOLFLAGS) --mode=link $(CCLD) $(libmod_plugin_la_CFLAGS) \
$(CFLAGS) $(AM_LDFLAGS)$(LDFLAGS) -o $@

Posted: **13 Jan 2009 04:41**

It appears to be an issue with the shared libstdc++ included in mingw:
/usr/lib/gcc/i586-mingw32msvc/4.2.1-sjlj/libstdc++.la

libmod_plugin requires these libraries:

Code: Select all

top_builddir="../.." ../../vlc-config -libs plugin libmod_plugin.la
 -lmodplug -lstdc++

The command to compile libmod_plugin.la is:

Code: Select all

/bin/bash ../../libtool --tag=CC   --mode=link i586-mingw32msvc-gcc -std=gnu99 `top_builddir="../.." ../../vlc-config --cflags plugin libmod_plugin.la` -mms-bitfields -Wall -Wextra -Wsign-compare -Wundef -Wpointer-arith -Wbad-function-cast -Wcast-align -Wwrite-strings -Wmissing-prototypes -Wvolatile-register-var -rpath '/usr/local/lib/vlc/demux' -avoid-version -module -no-undefined -export-symbol-regex ^vlc_entry -shrext .dll `top_builddir="../.." ../../vlc-config --ldflags plugin libmod_plugin.la` -L/usr/win32//lib -o libmod_plugin.la  libmod_plugin_la-mod.lo  `top_builddir="../.." ../../vlc-config -libs plugin libmod_plugin.la` ../../src/libvlccore.la -lmingw32

I replaced `top_builddir="../.." ../../vlc-config -libs plugin libmod_plugin.la` with '-lmodplug /usr/lib/gcc/i586-mingw32msvc/4.2.1-sjlj/libstdc++.a' for grins. Even though it complains, the -lgcc_s error disappears:

Code: Select all

/bin/bash ../../libtool --tag=CC   --mode=link i586-mingw32msvc-gcc -std=gnu99  -mms-bitfields -Wall -Wextra -Wsign-compare -Wundef -Wpointer-arith -Wbad-function-cast -Wcast-align -Wwrite-strings -Wmissing-prototypes -Wvolatile-register-var -rpath '/usr/local/lib/vlc/demux' -avoid-version -module -no-undefined -shrext .dll -o libmod_plugin.la  libmod_plugin_la-mod.lo -g  ../../src/libvlccore.la -lmingw32 -lmodplug /usr/lib/gcc/i586-mingw32msvc/4.2.1-sjlj/libstdc++.a

Code: Select all

*** Warning: Linking the shared library libmod_plugin.la against the
*** static library /usr/lib/gcc/i586-mingw32msvc/4.2.1-sjlj/libstdc++.a is not portable!
libtool: link: rm -fr  .libs/libmod_plugin.dll .libs/libmod_plugin.dll.a .libs/libmod_plugin.la .libs/libmod_plugin.lai
libtool: link: i586-mingw32msvc-gcc -std=gnu99 -shared  .libs/libmod_plugin_la-mod.o   ../../src/.libs/libvlccore.dll.a -L/usr/win32//lib -L/usr/win32/lib -lkernel32 -lws2_32 -lnetapi32 -lwinmm /usr/win32/lib/libiconv.a -lmingw32 /usr/win32/lib/libmodplug.a /usr/lib/gcc/i586-mingw32msvc/4.2.1-sjlj/libstdc++.a  -mms-bitfields   -o .libs/libmod_plugin.dll -Wl,--enable-auto-image-base -Xlinker --out-implib -Xlinker .libs/libmod_plugin.dll.a
Creating library file: .libs/libmod_plugin.dll.a
libtool: link: ( cd ".libs" && rm -f "libmod_plugin.la" && ln -s "../libmod_plugin.la" "libmod_plugin.la" )

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