At the same time, we make it actually do something on spidermonkey
builds. We also add an environment variable alternative, that we use
in mozconfig.stdcxx, allowing for mozconfig.no-compile to override it
and avoid configure failures on e.g. artifact builds.
--HG--
extra : rebase_source : b68d362025e0c99f9184a03391c652ec2c9357ad
Build slaves on automation are based on Centos 6, which doesn't have a
recent enough version of libstdc++ for our new requirements. But since
we're building with a recent GCC or clang with its own libstdc++, we do
have such a libstdc++ available somewhere, and the compiler picks it
when invoking the linker.
Problems start happening when we execute some of the built programs
during the build, like host tools (e.g. nsinstall), or target programs
(xpcshell, during packaging). In that case, we need the compiler's
libstdc++ to be used. Which required adding the GCC or clang library
directory to LD_LIBRARY_PATH.
Unconveniently enough, the clang 3.5 tooltool package we're using for
ASAN builds until we can update to at least 3.8 (bug 1278718) doesn't
contain libstdc++.so. So for those builds, pull the GCC package from
tooltool as well, and pick libstdc++ from there.
Mike Hommey