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Diffstat (limited to 'build-aux/m4/debug.m4')
| -rw-r--r-- | build-aux/m4/debug.m4 | 94 |
1 files changed, 94 insertions, 0 deletions
diff --git a/build-aux/m4/debug.m4 b/build-aux/m4/debug.m4 new file mode 100644 index 00000000..2bb5739d --- /dev/null +++ b/build-aux/m4/debug.m4 @@ -0,0 +1,94 @@ +## -*- Autoconf -*- +## debug.m4 -- massage compiler flags for debugging/optimisation +## +## Copyright (C) 2000-2001, 2003, 2005-2007, 2010, 2013 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 |