What steps will reproduce the problem?

When compiling the latest Google Gears src I get:

CPPFLAGS="-include /usr/include/stdlib.h -include /usr/include/string.h -include /usr/include/limits.h -include /usr/include/pthread.h -D_XOPEN_SOURCE=600" make MODE=opt ARCH=x86_64 OS=linux

<compilation>

/usr/bin/ld: cannot find -lxpcom collect2: ld returned 1 exit status make[1]: * [bin-opt/linux-x86_64/ff36/libgears.so] Error 1 make: * [default] Error 2

What is the expected output? What do you see instead?

Successful Compilation.

What version of the product are you using? On what operating system?

Karmic 64 Bit Ubuntu