# HG changeset patch
# User Paul Eggert <eggert@cs.ucla.edu>
# Date 1099502432 0
# Node ID cb65ad0582a2b0188a45dfe8fb27572e2d4c0c9b
# Parent  4966ef3f0d28f2dcf3b2a1deccb259ad45db863c
(gl_AC_TYPE_UINT32_T): When determining uint32_t
equivalent, substitute $ac_type for equivalent type rather than
blindly using uint32_t *always* which won't work if uint32_t is not
available.  Define _UINT32_T to work around typedef of uint32_t if
<sys/sched.h>, <pthread.h>, or <semaphore.h> used on Solaris
2.5.1.

diff --git a/m4/uint32_t.m4 b/m4/uint32_t.m4
--- a/m4/uint32_t.m4
+++ b/m4/uint32_t.m4
@@ -27,13 +27,17 @@
        AC_COMPILE_IFELSE(
 	 [AC_LANG_BOOL_COMPILE_TRY(
 	    [AC_INCLUDES_DEFAULT],
-	    [[(uint32_t) -1 == 4294967295U]])],
+	    [[($ac_type) -1 == 4294967295U]])],
 	 [gl_cv_c_uint32_t=$ac_type])
-       test $gl_cv_c_uint32_t != no && break
+       test "$gl_cv_c_uint32_t" != no && break
      done])
-  case $gl_cv_c_uint32_t in
+  case "$gl_cv_c_uint32_t" in
   no|uint32_t) ;;
   *)
+    AC_DEFINE(_UINT32_T, 1,
+      [Define for Solaris 2.5.1 so uint32_t typedef from <sys/synch.h>,
+       <pthread.h>, or <semaphore.h> is not used. If the typedef was
+       allowed, the #define below would cause a syntax error.])
     AC_DEFINE_UNQUOTED(uint32_t, $gl_cv_c_uint32_t,
       [Define to the type of a unsigned integer type of width exactly 32 bits
        if such a type exists and the standard includes do not define it.])