Currently LLVM build system does not pass any -std flags to C compiler
while compiling c-index-test.c. This makes clang default to C99, but
gcc defaults to C89. I think that LLVM build system should be fixed
to specify standard explicitly.
I'm not familiar with internals of LLVM build systems, could anyone
take a look at this and maybe fix it?
Is there a particular reason to choose C89 over C99?