X-Git-Url: https://git.hcoop.net/bpt/emacs.git/blobdiff_plain/7be1c708c5abc7dea388d45454bd19bff07b7943..51fb39ec639a79f3fdcc378f5d99b0703a57e317:/m4/strtoimax.m4

diff --git a/m4/strtoimax.m4 b/m4/strtoimax.m4
index 47fb1bc9c3..71137816f0 100644
--- a/m4/strtoimax.m4
+++ b/m4/strtoimax.m4
@@ -1,5 +1,5 @@
-# strtoimax.m4 serial 10
-dnl Copyright (C) 2002-2004, 2006, 2009-2011 Free Software Foundation, Inc.
+# strtoimax.m4 serial 14
+dnl Copyright (C) 2002-2004, 2006, 2009-2014 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
@@ -8,11 +8,75 @@ AC_DEFUN([gl_FUNC_STRTOIMAX],
 [
   AC_REQUIRE([gl_INTTYPES_H_DEFAULTS])
 
+  dnl On OSF/1 5.1 with cc, this function is declared but not defined.
+  AC_CHECK_FUNCS_ONCE([strtoimax])
   AC_CHECK_DECLS_ONCE([strtoimax])
   if test "$ac_cv_have_decl_strtoimax" != yes; then
     HAVE_DECL_STRTOIMAX=0
+  fi
 
-    AC_CHECK_FUNCS([strtoimax])
+  if test "$ac_cv_func_strtoimax" = yes; then
+    HAVE_STRTOIMAX=1
+    dnl On AIX 5.1, strtoimax() fails for values outside the 'int' range.
+    AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+    AC_CACHE_CHECK([whether strtoimax works], [gl_cv_func_strtoimax],
+      [AC_RUN_IFELSE(
+         [AC_LANG_SOURCE([[
+#include <errno.h>
+#include <string.h>
+#include <inttypes.h>
+int main ()
+{
+  if (sizeof (intmax_t) > sizeof (int))
+    {
+      const char *s = "4294967295";
+      char *p;
+      intmax_t res;
+      errno = 0;
+      res = strtoimax (s, &p, 10);
+      if (p != s + strlen (s))
+        return 1;
+      if (errno != 0)
+        return 2;
+      if (res != (intmax_t) 65535 * (intmax_t) 65537)
+        return 3;
+    }
+  else
+    {
+      const char *s = "2147483647";
+      char *p;
+      intmax_t res;
+      errno = 0;
+      res = strtoimax (s, &p, 10);
+      if (p != s + strlen (s))
+        return 1;
+      if (errno != 0)
+        return 2;
+      if (res != 2147483647)
+        return 3;
+    }
+  return 0;
+}
+]])],
+         [gl_cv_func_strtoimax=yes],
+         [gl_cv_func_strtoimax=no],
+         [case "$host_os" in
+                   # Guess no on AIX 5.
+            aix5*) gl_cv_func_strtoimax="guessing no" ;;
+                   # Guess yes otherwise.
+            *)     gl_cv_func_strtoimax="guessing yes" ;;
+          esac
+         ])
+      ])
+    case "$gl_cv_func_strtoimax" in
+      *no) REPLACE_STRTOIMAX=1 ;;
+    esac
+  else
+    if test "$ac_cv_have_decl_strtoimax" = yes; then
+      # HP-UX 11.11 has "#define strtoimax(...) ..." but no function.
+      REPLACE_STRTOIMAX=1
+    fi
+    HAVE_STRTOIMAX=0
   fi
 ])