Tried to perform a build with --enable-gtest on Ubuntu 12.10 and got the following when linking libxul: 11:18.93 /usr/bin/ld.gold.real: warning: hidden symbol 'pixman_add_triangles' in /home/gps/src/mozilla-central/obj-firefox/toolkit/library/../../gfx/cairo/libpixman/src/pixman-trap.o is referenced by DSO /usr/lib/gcc/x86_64-linux-gnu/4.7/../../../x86_64-linux-gnu/libcairo.so 11:18.93 /usr/bin/ld.gold.real: error: /home/gps/src/mozilla-central/obj-firefox/toolkit/library/../../testing/gtest/gtest-all.o: requires dynamic R_X86_64_PC32 reloc against 'environ' which may overflow at runtime; recompile with -fPIC 11:18.93 /home/gps/src/mozilla-central/testing/gtest/gtest/src/gtest-death-test.cc:894: error: undefined reference to 'environ' 11:18.93 clang: error: linker command failed with exit code 1 (use -v to see invocation) 11:18.93 make[5]: *** [libxul.so] Error 1 11:18.93 make[4]: *** [libs_tier_platform] Error 2 11:18.93 make[3]: *** [tier_platform] Error 2 11:18.94 make[2]: *** [default] Error 2 11:18.94 make[1]: *** [realbuild] Error 2 11:18.94 make: *** [build] Error 2

Can you try doing the analogous change made in bug 758843?

The equivalent of Bug 758843 fixed it for me.

Comment on attachment 718506 [details] [diff] [review] Be explicit about environ extern visibility Thanks!