cmake/TestClangVersion.c

   1 int main()
   2 {
   3 /* This detects 3.0 versions for both C and C++ clang. It detects the
   4  * version of the LLVM back end, and not (for example) the Apple clang
   5  * version number (which might be 4.1 or some number based on its
   6  * "compatibility with gcc 4.2.1," even though the LLVM back end is
   7  * 3.0!).
   8  *
   9  * If/when we have time or user complaints, we can maybe ban earlier
  10  * versions of clang, but we don't actually know there's a problem
  11  * with them at the time of this commit.
  12  */
  13 #if (__clang_major__ == 3) && (__clang_minor__ == 0)
  14     return 0;
  15 #else
  16 #error clang version information not found
  17 #endif
  18 }