open, fopen: Update regarding AIX.

[gnulib.git] / m4 / warnings.m4

diff --git a/m4/warnings.m4 b/m4/warnings.m4
index ca9bf5e..dad5c1f 100644 (file)
--- a/m4/warnings.m4
+++ b/m4/warnings.m4
@@ -1,26 +1,11 @@
-# warnings.m4 serial 1
-dnl Copyright (C) 2008 Free Software Foundation, Inc.
+# warnings.m4 serial 2
+dnl Copyright (C) 2008, 2009, 2010 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.
 
 dnl From Simon Josefsson
 
-# gl_WARN_INIT
-# Initializes WARN_CFLAGS variable.
-AC_DEFUN([gl_WARN_INIT],
-[AC_SUBST([WARN_CFLAGS])dnl
-AC_ARG_VAR([WARN_CFLAGS], [C compiler warning flags])
-])
-
-# gl_AS_VAR_IF(VAR, VALUE, [IF-MATCH], [IF-NOT-MATCH])
-# ----------------------------------------------------
-# Provide the functionality of AS_VAR_IF if Autoconf does not have it.
-m4_ifdef([AS_VAR_IF],
-[m4_copy([AS_VAR_IF], [gl_AS_VAR_IF])],
-[m4_define([gl_AS_VAR_IF],
-[AS_IF([test x"AS_VAR_GET([$1])" = x""$2], [$3], [$4])])])
-
 # gl_AS_VAR_APPEND(VAR, VALUE)
 # ----------------------------
 # Provide the functionality of AS_VAR_APPEND if Autoconf does not have it.
@@ -36,16 +21,16 @@ m4_ifdef([AS_VAR_APPEND],
 AC_DEFUN([gl_WARN_ADD],
 [AS_VAR_PUSHDEF([gl_Warn], [gl_cv_warn_$1])dnl
 AC_CACHE_CHECK([whether compiler handles $1], [gl_Warn], [
-  save_CFLAGS="$CFLAGS"
-  CFLAGS="${CFLAGS} $1"
+  save_CPPFLAGS="$CPPFLAGS"
+  CPPFLAGS="${CPPFLAGS} $1"
   AC_PREPROC_IFELSE([AC_LANG_PROGRAM([])],
                     [AS_VAR_SET([gl_Warn], [yes])],
-                   [AS_VAR_SET([gl_Warn], [no])])
-  CFLAGS="$save_CFLAGS"
+                    [AS_VAR_SET([gl_Warn], [no])])
+  CPPFLAGS="$save_CPPFLAGS"
 ])
 AS_VAR_PUSHDEF([gl_Flags], m4_if([$2], [], [[WARN_CFLAGS]], [[$2]]))dnl
-gl_AS_VAR_IF([gl_Warn], [yes], [gl_AS_VAR_APPEND([gl_Flags], [" $1"])])
+AS_VAR_IF([gl_Warn], [yes], [gl_AS_VAR_APPEND([gl_Flags], [" $1"])])
 AS_VAR_POPDEF([gl_Flags])dnl
 AS_VAR_POPDEF([gl_Warn])dnl
-AS_LITERAL_IF([$2], [AC_SUBST([$2])], [])dnl
+m4_ifval([$2], [AS_LITERAL_IF([$2], [AC_SUBST([$2])], [])])dnl
 ])