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## -*- Autoconf -*-
## debug.m4 -- massage compiler flags for debugging/optimisation
##
## Copyright (C) 2000-2001, 2003, 2005-2007, 2010, 2013-2014 Free
## Software Foundation, Inc.
## Copyright (C) 1999-2000 Ralf S. Engelschall
## Written by <rse@engelschall.com>
## Modified for M4 by Gary V. Vaughan <gary@gnu.org>
##
## This file is part of GNU M4.
##
## GNU M4 is free software: you can redistribute it and/or modify
## it under the terms of the GNU General Public License as published by
## the Free Software Foundation, either version 3 of the License, or
## (at your option) any later version.
##
## GNU M4 is distributed in the hope that it will be useful,
## but WITHOUT ANY WARRANTY; without even the implied warranty of
## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
## GNU General Public License for more details.
##
## You should have received a copy of the GNU General Public License
## along with this program. If not, see <http://www.gnu.org/licenses/>.
# serial 9
# M4_CHECK_DEBUGGING
# ------------------
# Debugging Support
AC_DEFUN([M4_CHECK_DEBUGGING],
[AC_REQUIRE([AC_PROG_CC])
AC_ARG_ENABLE([debug], [AS_HELP_STRING([--enable-debug],
[build for debugging [default=no]])])
AC_MSG_CHECKING([for compilation debug mode])
AC_MSG_RESULT([${enable_debug-no}])
: ${rm=rm -f}
: ${RM=rm -f}
set dummy $CC
compiler="${compiler-[$]2}"
test -n "$rm" || rm="rm -f"
if test "X$enable_debug" = Xyes; then
AC_DISABLE_SHARED
AC_DEFINE([DEBUG], [1],
[Define this to enable additional runtime debugging])
M4_default_preload="m4 traditional gnu load \
import modtest mpeval shadow stdlib time"
if test "$GCC" = yes; then
case "$CFLAGS" in
*-O* ) CFLAGS=`echo $CFLAGS | $SED 's/-O[[^ ]]* / /;s/-O[[^ ]]*$//'` ;;
esac
case "$CFLAGS" in
*-g* ) ;;
* ) AC_LIBTOOL_COMPILER_OPTION([if $compiler accepts -ggdb3],
[M4_cv_prog_compiler_ggdb3],
[-ggdb3 -c conftest.$ac_ext], [],
[CFLAGS="$CFLAGS -ggdb3"],
[CFLAGS="$CFLAGS -g"])
;;
esac
CFLAGS="$CFLAGS -Wall"
WMORE="-Wshadow -Wpointer-arith -Wcast-align -Wnested-externs"
WMORE="$WMORE -Wmissing-prototypes -Wmissing-declarations -Winline"
AC_LIBTOOL_COMPILER_OPTION([if $compiler accepts $WMORE],
[M4_cv_prog_compiler_warning_flags],
[$WMORE -c conftest.$ac_ext], [],
[CFLAGS="$CFLAGS $WMORE"])
AC_LIBTOOL_COMPILER_OPTION([if $compiler accepts -Wno-long-long],
[M4_cv_prog_compiler_wnolonglong],
[-Wno-long-long -c conftest.$ac_ext], [],
[CFLAGS="$CFLAGS -Wno-long-long"])
else
case "$CFLAGS" in
*-g* ) ;;
* ) CFLAGS="$CFLAGS -g" ;;
esac
fi
else
AC_ENABLE_SHARED
case "$CFLAGS" in
*-g* ) CFLAGS=`echo "$CFLAGS" |\
$SED -e 's/ -g / /g;s/ -g$//;s/^-g //g;s/^-g$//'`
;;
esac
case "$CXXFLAGS" in
*-g* ) CXXFLAGS=`echo "$CXXFLAGS" |\
$SED -e 's/ -g / /g;s/ -g$//;s/^-g //g;s/^-g$//'`
;;
esac
fi
])# M4_CHECK_DEBUGGING
|
