launchpad-users team mailing list archive

Thread
Date
library linking error

To: launchpad-users@xxxxxxxxxxxxxxxxxxx
From: Andrew Kelley <superjoe30@xxxxxxxxx>
Date: Tue, 19 Nov 2013 12:21:23 -0500
Hello -

I just added a library to my ppa:
https://launchpad.net/~andrewrk/+archive/libgroove
so far so good, it installs on my system. But when I compile a program
against it, I get linker errors - undefined symbols from libraries that my
library depends on. This does not happen when I manually build from source.

Any suggestions?

Here are some more details.

The problem:

andy@andy-bx:~/tmp$ c99 -o test test.c -lgroove
/usr/lib/gcc/x86_64-linux-gnu/4.8/../../../../lib/libgroove.a(file.c.o):
In function `cleanup_save':
(.text+0x29): undefined reference to `av_free_packet'
/usr/lib/gcc/x86_64-linux-gnu/4.8/../../../../lib/libgroove.a(file.c.o):
In function `cleanup_save':
(.text+0x39): undefined reference to `avio_closep'
/usr/lib/gcc/x86_64-linux-gnu/4.8/../../../../lib/libgroove.a(file.c.o):
In function `cleanup_save':
(.text+0x54): undefined reference to `avformat_free_context'
/usr/lib/gcc/x86_64-linux-gnu/4.8/../../../../lib/libgroove.a(file.c.o):
In function `cleanup_save':
(.text+0xa1): undefined reference to `av_log'
/usr/lib/gcc/x86_64-linux-gnu/4.8/../../../../lib/libgroove.a(file.c.o):
In function `groove_file_close':
(.text+0xe6): undefined reference to `av_free_packet'
/usr/lib/gcc/x86_64-linux-gnu/4.8/../../../../lib/libgroove.a(file.c.o):
In function `groove_file_close':
(.text+0x105): undefined reference to `avcodec_close'
/usr/lib/gcc/x86_64-linux-gnu/4.8/../../../../lib/libgroove.a(file.c.o):
In function `groove_file_close':
(.text+0x12b): undefined reference to `avformat_close_input'
/usr/lib/gcc/x86_64-linux-gnu/4.8/../../../../lib/libgroove.a(file.c.o):
In function `groove_file_close':
(.text+0x139): undefined reference to `SDL_DestroyMutex'
/usr/lib/gcc/x86_64-linux-gnu/4.8/../../../../lib/libgroove.a(file.c.o):
In function `groove_file_open':
(.text+0x16f): undefined reference to `av_mallocz'
/usr/lib/gcc/x86_64-linux-gnu/4.8/../../../../lib/libgroove.a(file.c.o):
In function `groove_file_open':
(.text+0x18f): undefined reference to `SDL_CreateMutex'
/usr/lib/gcc/x86_64-linux-gnu/4.8/../../../../lib/libgroove.a(file.c.o):
In function `groove_file_open':
(.text+0x1a1): undefined reference to `avformat_alloc_context'
...(snip)...

libav is a static dependency of libgroove, and SDL2 is a dynamic dependency.
test.c uses only libgroove, it does not depend on libav or SDL2.

andy@andy-bx:~$ ldd /usr/lib/libgroove.so.2.0.2
	linux-vdso.so.1 =>  (0x00007fff499c9000)
	libbz2.so.1.0 => /lib/x86_64-linux-gnu/libbz2.so.1.0 (0x00007fc04ecde000)
	libz.so.1 => /lib/x86_64-linux-gnu/libz.so.1 (0x00007fc04eac5000)
	libmp3lame.so.0 => /usr/lib/x86_64-linux-gnu/libmp3lame.so.0
(0x00007fc04e837000)
	libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0 (0x00007fc04e61a000)
	libSDL2-2.0.so.0 => /usr/lib/x86_64-linux-gnu/libSDL2-2.0.so.0
(0x00007fc04e346000)
	libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007fc04df7d000)
	libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007fc04dc79000)

	/lib64/ld-linux-x86-64.so.2 (0x00007fc04ff2a000)
	libasound.so.2 => /usr/lib/x86_64-linux-gnu/libasound.so.2 (0x00007fc04d989000)
	libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2 (0x00007fc04d784000)
	libpulse-simple.so.0 =>
/usr/lib/x86_64-linux-gnu/libpulse-simple.so.0 (0x00007fc04d580000)
	libpulse.so.0 => /usr/lib/x86_64-linux-gnu/libpulse.so.0 (0x00007fc04d337000)
	libX11.so.6 => /usr/lib/x86_64-linux-gnu/libX11.so.6 (0x00007fc04d001000)
	libXext.so.6 => /usr/lib/x86_64-linux-gnu/libXext.so.6 (0x00007fc04cdef000)
	libXcursor.so.1 => /usr/lib/x86_64-linux-gnu/libXcursor.so.1
(0x00007fc04cbe5000)
	libXinerama.so.1 => /usr/lib/x86_64-linux-gnu/libXinerama.so.1
(0x00007fc04c9e1000)
	libXi.so.6 => /usr/lib/x86_64-linux-gnu/libXi.so.6 (0x00007fc04c7d1000)
	libXrandr.so.2 => /usr/lib/x86_64-linux-gnu/libXrandr.so.2 (0x00007fc04c5c7000)
	libXss.so.1 => /usr/lib/x86_64-linux-gnu/libXss.so.1 (0x00007fc04c3c2000)
	libXxf86vm.so.1 => /usr/lib/x86_64-linux-gnu/libXxf86vm.so.1
(0x00007fc04c1bc000)
	librt.so.1 => /lib/x86_64-linux-gnu/librt.so.1 (0x00007fc04bfb4000)
	libpulsecommon-4.0.so =>
/usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-4.0.so
(0x00007fc04bd4c000)
	libjson-c.so.2 => /lib/x86_64-linux-gnu/libjson-c.so.2 (0x00007fc04bb42000)
	libdbus-1.so.3 => /lib/x86_64-linux-gnu/libdbus-1.so.3 (0x00007fc04b8fc000)
	libxcb.so.1 => /usr/lib/x86_64-linux-gnu/libxcb.so.1 (0x00007fc04b6de000)
	libXrender.so.1 => /usr/lib/x86_64-linux-gnu/libXrender.so.1
(0x00007fc04b4d4000)
	libXfixes.so.3 => /usr/lib/x86_64-linux-gnu/libXfixes.so.3 (0x00007fc04b2cd000)
	libwrap.so.0 => /lib/x86_64-linux-gnu/libwrap.so.0 (0x00007fc04b0c3000)
	libsndfile.so.1 => /usr/lib/x86_64-linux-gnu/libsndfile.so.1
(0x00007fc04ae5a000)
	libasyncns.so.0 => /usr/lib/x86_64-linux-gnu/libasyncns.so.0
(0x00007fc04ac54000)
	libXau.so.6 => /usr/lib/x86_64-linux-gnu/libXau.so.6 (0x00007fc04aa50000)
	libXdmcp.so.6 => /usr/lib/x86_64-linux-gnu/libXdmcp.so.6 (0x00007fc04a849000)
	libnsl.so.1 => /lib/x86_64-linux-gnu/libnsl.so.1 (0x00007fc04a62f000)
	libFLAC.so.8 => /usr/lib/x86_64-linux-gnu/libFLAC.so.8 (0x00007fc04a3fe000)
	libvorbisenc.so.2 => /usr/lib/x86_64-linux-gnu/libvorbisenc.so.2
(0x00007fc049f2e000)
	libvorbis.so.0 => /usr/lib/x86_64-linux-gnu/libvorbis.so.0 (0x00007fc049d01000)
	libogg.so.0 => /usr/lib/x86_64-linux-gnu/libogg.so.0 (0x00007fc049af8000)
	libresolv.so.2 => /lib/x86_64-linux-gnu/libresolv.so.2 (0x00007fc0498dd000)

# libav is not on this list because libgroove depends statically upon it


here's the difference in linker steps for libgroove.so between the
working manual build and the not-working PPA build:

# ppa link step (broken):

/usr/bin/cc  -fPIC -g -O2 -fstack-protector --param=ssp-buffer-size=4
-Wformat -Werror=format-security -D_FORTIFY_SOURCE=2  -O2 -g -DNDEBUG
-Wl,-Bsymbolic  -Wl,-z,relro -shared -Wl,-soname,libgroove.so.2 -o
libgroove.so.2.0.2 CMakeFiles/groove.dir/src/queue.c.o
CMakeFiles/groove.dir/src/loudness_detector.c.o
CMakeFiles/groove.dir/src/buffer.c.o
CMakeFiles/groove.dir/src/encoder.c.o
CMakeFiles/groove.dir/src/file.c.o
CMakeFiles/groove.dir/src/playlist.c.o
CMakeFiles/groove.dir/src/global.c.o
CMakeFiles/groove.dir/src/player.c.o
deps/libav/install/lib/libavfilter.a
deps/libav/install/lib/libavformat.a
deps/libav/install/lib/libavcodec.a
deps/libav/install/lib/libavresample.a
deps/libav/install/lib/libswscale.a deps/libav/install/lib/libavutil.a
-lbz2 -lz -lmp3lame -lpthread -Wl,-Bstatic -lSDL2main -Wl,-Bdynamic
-lSDL2 -lpthread -Wl,-Bstatic -lebur128 -lSDL2main -Wl,-Bdynamic
-lSDL2 -Wl,-Bstatic -lebur128 -Wl,-Bdynamic

# see full build log:
https://launchpadlibrarian.net/156927161/buildlog_ubuntu-saucy-amd64.libgroove_2.0.2-2_UPLOADING.txt.gz


# build manually from source link step (works):

/usr/bin/cc  -fPIC  -Wl,-Bsymbolic   -shared
-Wl,-soname,libgroove.so.2 -o libgroove.so.2.0.0
CMakeFiles/groove.dir/src/global.c.o
CMakeFiles/groove.dir/src/loudness_detector.c.o
CMakeFiles/groove.dir/src/playlist.c.o
CMakeFiles/groove.dir/src/buffer.c.o
CMakeFiles/groove.dir/src/encoder.c.o
CMakeFiles/groove.dir/src/queue.c.o CMakeFiles/groove.dir/src/file.c.o
CMakeFiles/groove.dir/src/player.c.o
deps/libav/install/lib/libavfilter.a
deps/libav/install/lib/libavformat.a
deps/libav/install/lib/libavcodec.a
deps/libav/install/lib/libavresample.a
deps/libav/install/lib/libswscale.a deps/libav/install/lib/libavutil.a
-lbz2 -lz -lmp3lame -lpthread -Wl,-Bstatic -lSDL2main -Wl,-Bdynamic
-lSDL2 -lpthread deps/ebur128/libebur128.a -Wl,-Bstatic -lSDL2main
-Wl,-Bdynamic -lSDL2
Follow ups

Re: library linking error
From: Frank Trampe, 2013-11-20