Parsing of -idirafter flag is stricter than clang/gcc

[llvmbot]

Bugzilla Link	11504
Version	3.0
OS	Linux
Reporter	LLVM Bugzilla Contributor

Extended Description

Specifying -idirafer/some/path (without a space) is accepted by both gcc and clang, but scan-build (or possibly ccc-analyzer) doesn't understand this and misses the include path. Using "-idirafter /some/path" (with a space) works without problems.

This probably isn't a huge deal (it took me about 30 seconds to add a space in the Makefile), but it is a bit inconsistent.

[llvmbot]

assigned to @tkremenek