Hi Peter, On Sat, Oct 06, 2012 at 12:28:07AM +0100, peter green wrote: > My previous experiments with multiarch cross-building had run into > lots of build-dependency and tool problems and as a result I hadn't > got arround to actually building anything beyond trivial test > programs. > Unfortunately I have now discovered that when I try to link against > some libraries I get link errors. > root@debian:/# arm-linux-gnueabihf-gcc test.c -lglib-2.0 > /usr/lib/gcc/arm-linux-gnueabihf/4.7/../../../../arm-linux-gnueabihf/bin/ld: > warning: libpcre.so.3, needed by > /usr/lib/arm-linux-gnueabihf/libglib-2.0.so, not found (try using > -rpath or -rpath-link) > /usr/lib/gcc/arm-linux-gnueabihf/4.7/../../../../arm-linux-gnueabihf/bin/ld: > warning: libpthread.so.0, needed by > /usr/lib/arm-linux-gnueabihf/libglib-2.0.so, not found (try using > -rpath or -rpath-link) > /usr/lib/gcc/arm-linux-gnueabihf/4.7/../../../../arm-linux-gnueabihf/bin/ld: > warning: librt.so.1, needed by > /usr/lib/arm-linux-gnueabihf/libglib-2.0.so, not found (try using > -rpath or -rpath-link) > /usr/lib/arm-linux-gnueabihf/libglib-2.0.so: undefined reference to > `pthread_rwlock_wrlock@GLIBC_2.4' > Any thoughts on what could be causing this and how best to fix it? This is a bug in the cross compiler that you're using. You can work around it by passing this option to gcc: -Wl,-rpath-link=/usr/lib/arm-linux-gnueabihf:/lib/arm-linux-gnueabihf:/usr/lib To work around this class of bug when doing package builds, you can use the standard DEB_LDFLAGS_APPEND interface, as described at <https://wiki.linaro.org/Platform/DevPlatform/CrossCompile/UsingMultiArch>: export DEB_LDFLAGS_APPEND="-L/usr/lib/arm-linux-gnueabi -L/lib/arm-linux-gnueabi -L/usr/lib -Wl,-rpath-link=/usr/lib/arm-linux-gnueabi:/lib/arm-linux-gnueabi:/usr/lib" HTH, -- Steve Langasek Give me a lever long enough and a Free OS Debian Developer to set it on, and I can move the world. Ubuntu Developer http://www.debian.org/ slangasek@ubuntu.com vorlon@debian.org
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