From 0b360f0c7de63ddb9bb20d2fead9e077d9fef735 Mon Sep 17 00:00:00 2001 From: P. J. McDermott Date: Fri, 24 Feb 2023 08:52:32 -0500 Subject: build: Use ASAN and GCC warnings from Gnulib --- (limited to 'm4/ax_prepend_flag.m4') diff --git a/m4/ax_prepend_flag.m4 b/m4/ax_prepend_flag.m4 new file mode 100644 index 0000000..adac8c5 --- /dev/null +++ b/m4/ax_prepend_flag.m4 @@ -0,0 +1,51 @@ +# =========================================================================== +# https://www.gnu.org/software/autoconf-archive/ax_prepend_flag.html +# =========================================================================== +# +# SYNOPSIS +# +# AX_PREPEND_FLAG(FLAG, [FLAGS-VARIABLE]) +# +# DESCRIPTION +# +# FLAG is added to the front of the FLAGS-VARIABLE shell variable, with a +# space added in between. +# +# If FLAGS-VARIABLE is not specified, the current language's flags (e.g. +# CFLAGS) is used. FLAGS-VARIABLE is not changed if it already contains +# FLAG. If FLAGS-VARIABLE is unset in the shell, it is set to exactly +# FLAG. +# +# NOTE: Implementation based on AX_APPEND_FLAG. +# +# LICENSE +# +# Copyright (c) 2008 Guido U. Draheim +# Copyright (c) 2011 Maarten Bosmans +# Copyright (c) 2018 John Zaitseff +# +# 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 2 + +AC_DEFUN([AX_PREPEND_FLAG], +[dnl +AC_PREREQ(2.64)dnl for _AC_LANG_PREFIX and AS_VAR_SET_IF +AS_VAR_PUSHDEF([FLAGS], [m4_default($2,_AC_LANG_PREFIX[FLAGS])]) +AS_VAR_SET_IF(FLAGS,[ + AS_CASE([" AS_VAR_GET(FLAGS) "], + [*" $1 "*], [AC_RUN_LOG([: FLAGS already contains $1])], + [ + FLAGS="$1 $FLAGS" + AC_RUN_LOG([: FLAGS="$FLAGS"]) + ]) + ], + [ + AS_VAR_SET(FLAGS,[$1]) + AC_RUN_LOG([: FLAGS="$FLAGS"]) + ]) +AS_VAR_POPDEF([FLAGS])dnl +])dnl AX_PREPEND_FLAG -- cgit v0.9.1