An autoconf macro for its associated module.

[gnulib.git] / m4 / strtoumax.m4

diff --git a/m4/strtoumax.m4 b/m4/strtoumax.m4
new file mode 100644 (file)
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--- /dev/null
+++ b/m4/strtoumax.m4
@@ -0,0 +1,39 @@
+# strtoumax.m4 serial 1
+dnl Copyright (C) 2002 Free Software Foundation, Inc.
+dnl This file is free software, distributed under the terms of the GNU
+dnl General Public License.  As a special exception to the GNU General
+dnl Public License, this file may be distributed as part of a program
+dnl that contains a configuration script generated by Autoconf, under
+dnl the same distribution terms as the rest of that program.
+
+AC_DEFUN([gl_FUNC_STRTOUMAX],
+[
+  dnl Work around a bug of AC_EGREP_CPP in autoconf-2.57.
+  AC_REQUIRE([AC_PROG_CPP])
+  AC_REQUIRE([AC_PROG_EGREP])
+
+  AC_CACHE_CHECK([whether <inttypes.h> defines strtoumax as a macro],
+    jm_cv_func_strtoumax_macro,
+    AC_EGREP_CPP([inttypes_h_defines_strtoumax], [#include <inttypes.h>
+#ifdef strtoumax
+ inttypes_h_defines_strtoumax
+#endif],
+      jm_cv_func_strtoumax_macro=yes,
+      jm_cv_func_strtoumax_macro=no))
+
+  if test "$jm_cv_func_strtoumax_macro" != yes; then
+    AC_REPLACE_FUNCS(strtoumax)
+    if test $ac_cv_func_strtoumax = no; then
+      gl_PREREQ_STRTOUMAX
+    fi
+  fi
+])
+
+# Prerequisites of lib/strtoumax.c.
+AC_DEFUN([gl_PREREQ_STRTOUMAX], [
+  jm_AC_TYPE_UINTMAX_T
+  AC_CHECK_HEADERS_ONCE(stdlib.h)
+  AC_CHECK_DECLS_ONCE(strtoul)
+  AC_CHECK_DECLS(strtoull)
+  AC_REQUIRE([jm_AC_TYPE_UNSIGNED_LONG_LONG])
+])