Remove runtime check in configure for four-byte integer type.

That didn't work when cross-compiling.  Simply rely on limits.h.
If a compiler does not have limits.h, then zconf.h.in should be
modified to define Z_U4 as an unsiged four-byte integer type in
order for crc32() to be fast.

This also simplifies and makes more portable to check for a four-
byte type using limits.h.

1 files changed, 5 insertions, 11 deletions

diff --git a/zconf.h.cmakein b/zconf.h.cmakein
index 028be15..9254e9a 100644
--- a/zconf.h.cmakein
+++ b/zconf.h.cmakein
@@ -392,20 +392,14 @@ typedef uLong FAR uLongf;
    typedef Byte       *voidp;
 #endif
 
-/* ./configure may #define Z_U4 here */
-
 #if !defined(Z_U4) && !defined(Z_SOLO) && defined(STDC)
 #  include <limits.h>
-#  if (UINT_MAX == 0xffffffffUL)
+#  if (UINT_MAX == 4294967295)
 #    define Z_U4 unsigned
-#  else
-#    if (ULONG_MAX == 0xffffffffUL)
-#      define Z_U4 unsigned long
-#    else
-#      if (USHRT_MAX == 0xffffffffUL)
-#        define Z_U4 unsigned short
-#      endif
-#    endif
+#  elif (ULONG_MAX == 4294967295)
+#    define Z_U4 unsigned long
+#  elif (USHRT_MAX == 4294967295)
+#    define Z_U4 unsigned short
 #  endif
 #endif