1 files changed, 53 insertions, 0 deletions
diff --git a/m4/uint32_t.m4 b/m4/uint32_t.m4
new file mode 100644
index 0000000..1fb5e66
--- /dev/null
+++ b/m4/uint32_t.m4
@@ -0,0 +1,53 @@
+# uint32_t.m4 serial 4
+
+# Copyright (C) 2004 Free Software Foundation, Inc.
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# Written by Paul Eggert.
+
+AC_DEFUN([gl_AC_TYPE_UINT32_T],
+[
+  AC_CACHE_CHECK([for uint32_t], gl_cv_c_uint32_t,
+    [gl_cv_c_uint32_t=no
+     for ac_type in "uint32_t" "unsigned int" \
+	 "unsigned long int" "unsigned short int"; do
+       AC_COMPILE_IFELSE(
+	 [AC_LANG_BOOL_COMPILE_TRY(
+	    [AC_INCLUDES_DEFAULT],
+	    [[($ac_type) -1 == 4294967295U]])],
+	 [gl_cv_c_uint32_t=$ac_type])
+       test "$gl_cv_c_uint32_t" != no && break
+     done])
+  case "$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.])
+    ;;
+  esac
+
+  AC_CACHE_CHECK([for UINT32_MAX], gl_cv_c_uint32_max,
+    [AC_COMPILE_IFELSE(
+       [AC_LANG_BOOL_COMPILE_TRY(
+	  [AC_INCLUDES_DEFAULT],
+	  [[UINT32_MAX == 4294967295U]])],
+       [gl_cv_c_uint32_max=yes],
+       [gl_cv_c_uint32_max=no])])
+  case $gl_cv_c_uint32_max,$gl_cv_c_uint32_t in
+  yes,*) ;;
+  *,no) ;;
+  *)
+    AC_DEFINE(UINT32_MAX, 4294967295U,
+      [Define to its maximum value if an unsigned integer type of width
+       exactly 32 bits exists and the standard includes do not define
+       UINT32_MAX.])
+    ;;
+  esac
+])