Andrew This is the problem that cross compiler is not linking with the math library. During plugin development, I have specified -lm (though it is also compiling without specifying -lm) and also when I am calling the plugin, I am specifying -lm to indicate the compiler that link the math library too. But, in my previous mail, as can be seen that the libraries searched do not include libmath.so file. This is what I don't understand that why it is not including the library. Regards Abdul On Tue, Sep 4, 2012 at 1:59 PM, Andrew Haley <aph@xxxxxxxxxx> wrote: > On 09/04/2012 01:33 PM, Abdul Wahid Memon wrote: > >> I did the compilation with LD_DEBUG=symbols and got the following >> output. I don't understand that why it is not looking for math >> library. >> >> $ LD_DEBUG=symbols arm-none-linux-gnueabi-gcc >> -fplugin=/home/abdul/plugin_v4.so hello.c -lm >> -L/home/abdul/cross-tools/rootfs/arm-none-linux-gnueabi/libc/usr/lib/ >> >> symbol=pow; lookup in >> file=/home/abdul/cross-tools/rootfs/bin/../libexec/gcc/arm-none-linux-gnueabi/4.6.2/cc1 >> [0] >> 30679: symbol=pow; lookup in >> file=/home/abdul/cross-tools/rootfs/lib/libmpc.so.2 [0] >> 30679: symbol=pow; lookup in >> file=/home/abdul/cross-tools/rootfs/lib/libmpfr.so.1 [0] >> 30679: symbol=pow; lookup in >> file=/home/abdul/cross-tools/rootfs/lib/libgmp.so.3 [0] >> 30679: symbol=pow; lookup in file=/usr/lib/libdl.so.2 [0] >> 30679: symbol=pow; lookup in file=/usr/lib/libc.so.6 [0] >> 30679: symbol=pow; lookup in file=/lib64/ld-linux-x86-64.so.2 [0] >> 30679: symbol=pow; lookup in file=/home/abdul/plugin_v4.so [0] >> 30679: symbol=pow; lookup in file=/usr/lib/libc.so.6 [0] >> 30679: symbol=pow; lookup in file=/lib64/ld-linux-x86-64.so.2 [0] >> 30679: /home/abdul/plugin_v4.so: error: symbol lookup error: >> undefined symbol: pow (fatal) >> >> And for the plugin I got >> >> linux-vdso.so.1 (0x00007fffb3ba2000) >> libc.so.6 => /usr/lib/libc.so.6 (0x00007f8e03274000) >> /usr/lib/ld-linux-x86-64.so.2 (0x00007f8e03843000) >> >> Any further suggestions. > > I don't really understand what difficult you are having. Clearly > something need to be linked with -lm. It's whatever object uses > pow(). I don't know which object that is, because you haven't told > me. It may be your plugin, in which case your plugin needs to be > linked with -lm. This is just normal C programming, nothing to do > with GCC. > > Andrew.
