[modules] Before marking the module imported macros as ambiguous, check if this is a case where
the system macro uses a not identical definition compared to a macro from the clang headers.
For example (these come from different modules):
\#define LONG_MAX __LONG_MAX__ (clang's limits.h)
\#define LONG_MAX 0x7fffffffffffffffL (system's limits.h)
in which case don't mark them ambiguous to avoid the "ambiguous macro expansion" warning.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@178109 91177308-0d34-0410-b5e6-96231b3b80d8
3 files changed