Avoid quadratic strstr implementations.

[gnulib.git] / m4 / snprintf.m4

diff --git a/m4/snprintf.m4 b/m4/snprintf.m4
index b6f9f67..f21200d 100644 (file)
--- a/m4/snprintf.m4
+++ b/m4/snprintf.m4
@@ -1,4 +1,4 @@
-# snprintf.m4 serial 3
+# snprintf.m4 serial 4
 dnl Copyright (C) 2002, 2003, 2004, 2007 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -7,11 +7,23 @@ dnl with or without modifications, as long as this notice is preserved.
 AC_DEFUN([gl_FUNC_SNPRINTF],
 [
   AC_REQUIRE([gl_STDIO_H_DEFAULTS])
-  AC_REPLACE_FUNCS(snprintf)
-  AC_CHECK_DECLS_ONCE(snprintf)
+  AC_CHECK_FUNCS([snprintf])
+  if test $ac_cv_func_snprintf = no; then
+    gl_REPLACE_SNPRINTF
+  fi
+  AC_CHECK_DECLS_ONCE([snprintf])
   if test $ac_cv_have_decl_snprintf = no; then
     HAVE_DECL_SNPRINTF=0
   fi
+])
+
+AC_DEFUN([gl_REPLACE_SNPRINTF],
+[
+  AC_REQUIRE([gl_STDIO_H_DEFAULTS])
+  AC_LIBOBJ([snprintf])
+  if test $ac_cv_func_snprintf = yes; then
+    REPLACE_SNPRINTF=1
+  fi
   gl_PREREQ_SNPRINTF
 ])