stdint and mingw

[Eric Blake]

mingw has wint_t as unsigned int, but defined WINT_MAX as 0xffff to match 
WCHAR_MAX.  Without this patch, stdint.m4 claims mingw's header is C99 
compliant, then crashes the m4 testsuite (now that m4 uses the gnulib unit 
tests) when encountering the invalid WINT_MAX.  With this patch, test-stdint.c 
passes once again on mingw.  Is this patch okay to apply?

Other holdups in releasing m4 1.4.10:
- mingw's atof/strtod does not parse infinity or nan, but gnulib's strtod 
module does not yet provide this capability either.  I hope to work on this 
soon, if no one beats me to it.

- gnulib's unistd module does not provide the types gid_t, uid_t, or 
useconds_t, all of which are undefined in mingw, but Bruno's recent testsuite 
additions means that test-unistd.c crashes on mingw in trying to use these 
types.

2007-05-29  Eric Blake  <address@hidden>

        * m4/stdint.m4 (gl_STDINT_H): Detect mingw bug.

Index: m4/stdint.m4
===================================================================
RCS file: /sources/gnulib/gnulib/m4/stdint.m4,v
retrieving revision 1.29
diff -u -p -r1.29 stdint.m4
--- m4/stdint.m4        28 Apr 2007 18:05:58 -0000      1.29
+++ m4/stdint.m4        29 May 2007 23:12:05 -0000
@@ -147,7 +147,7 @@ struct s {
   int check_SIG_ATOMIC: SIG_ATOMIC_MIN <= (sig_atomic_t) 0 && (sig_atomic_t) 0 
< SIG_ATOMIC_MAX ? 1 : -1;
   int check_SIZE: (size_t) 0 < SIZE_MAX ? 1 : -1;
   int check_WCHAR: WCHAR_MIN <= (wchar_t) 0 && (wchar_t) 0 < WCHAR_MAX ? 1 : -
1;
-  int check_WINT: WINT_MIN <= (wint_t) 0 && (wint_t) 0 < WINT_MAX ? 1 : -1;
+  int check_WINT: WINT_MIN <= (wint_t) 0 && (wint_t) 0 < WINT_MAX && (wint_t) 
(WINT_MAX + 1) <= (wint_t) 0 ? 1 : -1;
 
   /* Detect bugs in glibc 2.4 and Solaris 10 stdint.h, among others.  */
   int check_UINT8_C: