the target libraries, as 4.3.4
I trigger the breaking build using uclibc, instead of glibc, and then the
mixture of CPP getting the build glibc headers, and CC getting the uclibc
headers, makes the problem evident.
In 4.3.4 it only affected libmudflap. In 4.4.2, it affects libmudflap and
libstdc++.
svn path=/nixpkgs/branches/stdenv-updates/; revision=18850