imaxabs: Avoid link error on OSF/1 with DTK cc.

[gnulib.git] / m4 / imaxabs.m4

diff --git a/m4/imaxabs.m4 b/m4/imaxabs.m4
index 58e5ac8..294b8f5 100644 (file)
--- a/m4/imaxabs.m4
+++ b/m4/imaxabs.m4
@@ -1,4 +1,4 @@
-# imaxabs.m4 serial 3
+# imaxabs.m4 serial 4
 dnl Copyright (C) 2006, 2009-2011 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -7,6 +7,9 @@ dnl with or without modifications, as long as this notice is preserved.
 AC_DEFUN([gl_FUNC_IMAXABS],
 [
   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([imaxabs])
   AC_CHECK_DECLS_ONCE([imaxabs])
   if test "$ac_cv_have_decl_imaxabs" != yes; then
     HAVE_DECL_IMAXABS=0