Make LDC work with LLVM trunk (s/LinkOnceLinkage/LinkOnceOdrLinkage/) Also moved the #defines for linkage types into a separate header instead of mars.h so we can #include revisions.h without having to rebuild the entire frontend every time we update. (I'm using revisions.h to get the LLVM revision for use in preprocessor conditionals. It should work with LLVM release 2.5, old trunk and new trunk)

module complex1;

void main()
{
    cfloat cf1 = 3f + 0i;
    cfloat cf2 = 4f + 1i;
    cfloat cf3 = func();
    auto c1 = cf1 + cf2;
    auto c2 = cf2 - cf3;
    auto c3 = cf1 * cf3;
    auto c4 = cf2 / cf3;
}

cfloat func()
{
    return 3f + 1i;
}