Hi I want to cross compile PJSIP from my Ubuntu machine running on x86, for raspberry pi, arm architecture. But there's some problems. I've installed "gcc-arm-linux-gnueabi", to cross compile the PJSIP using it for 'arm'. I ran "./configure -hostname=arm-linux-gnueabi" and it seems it's ok : (part of the above command result) checking build system type... x86_64-unknown-linux-gnu checking host system type... arm-unknown-linux-gnueabi checking target system type... arm-unknown-linux-gnueabi checking for arm-linux-gnueabi-gcc... arm-linux-gnueabi-gcc checking whether the C compiler works... yes checking for C compiler default output file name... a.out checking for suffix of executables... checking whether we are cross compiling... yes checking for suffix of object files... o checking whether we are using the GNU C compiler... yes checking whether arm-linux-gnueabi-gcc accepts -g... yes the following is the result of "make dep" : make[2]: Leaving directory `/home/farzan/pjproject-2.4.5/pjsip-apps/build' make -f Samples.mak depend make[2]: Entering directory `/home/farzan/pjproject-2.4.5/pjsip-apps/build' make[2]: Nothing to be done for `depend'. make[2]: Leaving directory `/home/farzan/pjproject-2.4.5/pjsip-apps/build' make[1]: Leaving directory `/home/farzan/pjproject-2.4.5/pjsip-apps/build' when I run "make" I get the following error: /usr/lib/gcc-cross/arm-linux-gnueabi/4.7/../../../../arm-linux-gnueabi/bin/l d: cannot find -lasound /usr/lib/gcc-cross/arm-linux-gnueabi/4.7/../../../../arm-linux-gnueabi/bin/l d: cannot find -lasound /usr/lib/gcc-cross/arm-linux-gnueabi/4.7/../../../../arm-linux-gnueabi/bin/l d: cannot find -lasound collect2: error: ld returned 1 exit status make[2]: *** [../bin/pjlib-test-arm-unknown-linux-gnueabi] Error 1 make[2]: Leaving directory `/home/farzan/pjproject-2.4.5/pjlib/build' make[1]: *** [pjlib-test-arm-unknown-linux-gnueabi] Error 2 make[1]: Leaving directory `/home/farzan/pjproject-2.4.5/pjlib/build' make: *** [all] Error 1 has anybody no idea?? How can I solve it?