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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-27 07:24:22 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-27 07:24:22 +0000
commit45d6379135504814ab723b57f0eb8be23393a51d (patch)
treed4f2ec4acca824a8446387a758b0ce4238a4dffa /m4/ax_check_preproc_flag.m4
parentInitial commit. (diff)
downloadbind9-45d6379135504814ab723b57f0eb8be23393a51d.tar.xz
bind9-45d6379135504814ab723b57f0eb8be23393a51d.zip
Adding upstream version 1:9.16.44.upstream/1%9.16.44upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'm4/ax_check_preproc_flag.m4')
-rw-r--r--m4/ax_check_preproc_flag.m455
1 files changed, 55 insertions, 0 deletions
diff --git a/m4/ax_check_preproc_flag.m4 b/m4/ax_check_preproc_flag.m4
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+++ b/m4/ax_check_preproc_flag.m4
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+# SPDX-License-Identifier: FSFAP
+#
+# ===========================================================================
+# https://www.gnu.org/software/autoconf-archive/ax_check_preproc_flag.html
+# ===========================================================================
+#
+# SYNOPSIS
+#
+# AX_CHECK_PREPROC_FLAG(FLAG, [ACTION-SUCCESS], [ACTION-FAILURE], [EXTRA-FLAGS], [INPUT])
+#
+# DESCRIPTION
+#
+# Check whether the given FLAG works with the current language's
+# preprocessor or gives an error. (Warnings, however, are ignored)
+#
+# ACTION-SUCCESS/ACTION-FAILURE are shell commands to execute on
+# success/failure.
+#
+# If EXTRA-FLAGS is defined, it is added to the preprocessor's default
+# flags when the check is done. The check is thus made with the flags:
+# "CPPFLAGS EXTRA-FLAGS FLAG". This can for example be used to force the
+# preprocessor to issue an error when a bad flag is given.
+#
+# INPUT gives an alternative input source to AC_PREPROC_IFELSE.
+#
+# NOTE: Implementation based on AX_CFLAGS_GCC_OPTION. Please keep this
+# macro in sync with AX_CHECK_{COMPILE,LINK}_FLAG.
+#
+# LICENSE
+#
+# Copyright (c) 2008 Guido U. Draheim <guidod@gmx.de>
+# Copyright (c) 2011 Maarten Bosmans <mkbosmans@gmail.com>
+#
+# Copying and distribution of this file, with or without modification, are
+# permitted in any medium without royalty provided the copyright notice
+# and this notice are preserved. This file is offered as-is, without any
+# warranty.
+
+#serial 6
+
+AC_DEFUN([AX_CHECK_PREPROC_FLAG],
+[AC_PREREQ(2.64)dnl for _AC_LANG_PREFIX and AS_VAR_IF
+AS_VAR_PUSHDEF([CACHEVAR],[ax_cv_check_[]_AC_LANG_ABBREV[]cppflags_$4_$1])dnl
+AC_CACHE_CHECK([whether _AC_LANG preprocessor accepts $1], CACHEVAR, [
+ ax_check_save_flags=$CPPFLAGS
+ CPPFLAGS="$CPPFLAGS $4 $1"
+ AC_PREPROC_IFELSE([m4_default([$5],[AC_LANG_PROGRAM()])],
+ [AS_VAR_SET(CACHEVAR,[yes])],
+ [AS_VAR_SET(CACHEVAR,[no])])
+ CPPFLAGS=$ax_check_save_flags])
+AS_VAR_IF(CACHEVAR,yes,
+ [m4_default([$2], :)],
+ [m4_default([$3], :)])
+AS_VAR_POPDEF([CACHEVAR])dnl
+])dnl AX_CHECK_PREPROC_FLAGS