[Bug c/13279] New: C preprocessor doesn't work correctly with symbol expressions

["xomicron at mail dot ru" <gcc-bugzilla at gcc dot gnu dot org>]

Following code works ok:
#if COMPILER==1
...
#else
...
#endif

But the code like
#if COMPILER==MSVC
...
#else
#endif

Always selects first branch with no mention to actual value of COMPILER. It 
looks like CPP understands only numbers in such expressions, but allows to 
assign string. MS VC works differently. I'm not sure if it is correct behavior. 
Work around - to define used strings with macro like:
#define GNU 0
#define MSVC 1

-- 
           Summary: C preprocessor doesn't work correctly with symbol
                    expressions
           Product: gcc
           Version: 3.3.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: xomicron at mail dot ru
                CC: gcc-bugs at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13279