mirror of
https://github.com/pygos/init.git
synced 2024-11-05 12:17:10 +01:00
40 lines
1.5 KiB
Text
40 lines
1.5 KiB
Text
dnl Copyright (C) 2008-2011 Free Software Foundation, Inc.
|
|
dnl This file is free software; the Free Software Foundation
|
|
dnl gives unlimited permission to copy and/or distribute it,
|
|
dnl with or without modifications, as long as this notice is preserved.
|
|
|
|
dnl From Simon Josefsson
|
|
dnl -- derivated from coreutils m4/warnings.m4
|
|
|
|
# UL_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], [UL_AS_VAR_APPEND])],
|
|
[m4_define([UL_AS_VAR_APPEND],
|
|
[AS_VAR_SET([$1], [AS_VAR_GET([$1])$2])])])
|
|
|
|
# UL_ADD_WARN(COMPILER_OPTION [, VARNAME])
|
|
# ------------------------
|
|
# Adds parameter to WARN_CFLAGS (or to $VARNAME) if the compiler supports it.
|
|
AC_DEFUN([UL_WARN_ADD], [
|
|
m4_define([warnvarname], m4_default([$2],WARN_CFLAGS))
|
|
AS_VAR_PUSHDEF([ul_Warn], [ul_cv_warn_$1])dnl
|
|
AC_CACHE_CHECK([whether compiler handles $1], m4_defn([ul_Warn]), [
|
|
# store AC_LANG_WERROR status, then turn it on
|
|
save_ac_[]_AC_LANG_ABBREV[]_werror_flag="${ac_[]_AC_LANG_ABBREV[]_werror_flag}"
|
|
AC_LANG_WERROR
|
|
|
|
ul_save_CPPFLAGS="$CPPFLAGS"
|
|
CPPFLAGS="-Werror ${CPPFLAGS} $1"
|
|
AC_PREPROC_IFELSE([AC_LANG_PROGRAM([])],
|
|
[AS_VAR_SET(ul_Warn, [yes])],
|
|
[AS_VAR_SET(ul_Warn, [no])])
|
|
# restore AC_LANG_WERROR
|
|
ac_[]_AC_LANG_ABBREV[]_werror_flag="${save_ac_[]_AC_LANG_ABBREV[]_werror_flag}"
|
|
|
|
CPPFLAGS="$ul_save_CPPFLAGS"
|
|
])
|
|
AS_VAR_IF(ul_Warn, [yes], [UL_AS_VAR_APPEND(warnvarname, [" $1"])])
|
|
])
|
|
|