X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=m4%2Fwarnings.m4;h=dad5c1f29c66aeebca880e65f9084fc4930a2e81;hb=f921c7d1ed533250523b43796cd53144c048b01f;hp=594ff97b486bb79c4236b3f879c4cf74b139e547;hpb=3aa989ad366e5b1cf2482566e53de69a934779c2;p=gnulib.git

diff --git a/m4/warnings.m4 b/m4/warnings.m4
index 594ff97b4..dad5c1f29 100644
--- a/m4/warnings.m4
+++ b/m4/warnings.m4
@@ -1,34 +1,36 @@
-# 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_ARG_VAR(WARN_CFLAGS, [C compiler warning flags])
-])
+# gl_AS_VAR_APPEND(VAR, VALUE)
+# ----------------------------
+# Provide the functionality of AS_VAR_APPEND if Autoconf does not have it.
+m4_ifdef([AS_VAR_APPEND],
+[m4_copy([AS_VAR_APPEND], [gl_AS_VAR_APPEND])],
+[m4_define([gl_AS_VAR_APPEND],
+[AS_VAR_SET([$1], [AS_VAR_GET([$1])$2])])])
 
-# gl_WARN_ADD([parameter]) adds parameter to WARN_CFLAGS if compiler
-# supports it.  For example, use gl_WARN_ADD([-Werror]).
+# gl_WARN_ADD(PARAMETER, [VARIABLE = WARN_CFLAGS])
+# ------------------------------------------------
+# Adds parameter to WARN_CFLAGS if the compiler supports it.  For example,
+# gl_WARN_ADD([-Wparentheses]).
 AC_DEFUN([gl_WARN_ADD],
-[
-  pushdef([param],[translit([$1],[ABCDEFGHIJKLMNOPQRSTUVWXYZ./-],
-                                 [abcdefghijklmnopqrstuvwxyz___])])
-
-  AC_CACHE_CHECK([whether compiler handles $1], [gl_cv_warn[]param[]], [
-    save_CFLAGS="$CFLAGS"
-    CFLAGS="${CFLAGS} $1"
-    AC_PREPROC_IFELSE([AC_LANG_PROGRAM([])],
-                       gl_cv_warn[]param=yes, gl_cv_warn[]param=no)
-    CFLAGS="$save_CFLAGS"
-  ])
-
-  if test $gl_cv_warn[]param = "yes"; then
-    WARN_CFLAGS="$WARN_CFLAGS $1"
-  fi
+[AS_VAR_PUSHDEF([gl_Warn], [gl_cv_warn_$1])dnl
+AC_CACHE_CHECK([whether compiler handles $1], [gl_Warn], [
+  save_CPPFLAGS="$CPPFLAGS"
+  CPPFLAGS="${CPPFLAGS} $1"
+  AC_PREPROC_IFELSE([AC_LANG_PROGRAM([])],
+                    [AS_VAR_SET([gl_Warn], [yes])],
+                    [AS_VAR_SET([gl_Warn], [no])])
+  CPPFLAGS="$save_CPPFLAGS"
+])
+AS_VAR_PUSHDEF([gl_Flags], m4_if([$2], [], [[WARN_CFLAGS]], [[$2]]))dnl
+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
+m4_ifval([$2], [AS_LITERAL_IF([$2], [AC_SUBST([$2])], [])])dnl
 ])