99 lines
3.6 KiB
Text
99 lines
3.6 KiB
Text
# Autoconf include file defining macros related to compile-time warnings.
|
|
|
|
# Copyright 2004, 2005 Free Software Foundation, Inc.
|
|
|
|
#This file is part of GCC.
|
|
|
|
#GCC 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 2, or (at your option) any later
|
|
#version.
|
|
|
|
#GCC 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 GCC; see the file COPYING. If not, write to the Free
|
|
#Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
|
|
#02110-1301, USA.
|
|
|
|
# ACX_PROG_CC_WARNING_OPTS([-Wfoo -Wbar -Wbaz])
|
|
# Sets @WARN_CFLAGS@ to the subset of the given options which the
|
|
# compiler accepts.
|
|
AC_DEFUN([ACX_PROG_CC_WARNING_OPTS],
|
|
[AC_REQUIRE([AC_PROG_CC])dnl
|
|
AC_SUBST([WARN_CFLAGS])dnl
|
|
WARN_CFLAGS=
|
|
save_CFLAGS="$CFLAGS"
|
|
for option in $1; do
|
|
AS_VAR_PUSHDEF([acx_Woption], [acx_cv_prog_cc_warning_$option])
|
|
AC_CACHE_CHECK([whether $CC supports $option], acx_Woption,
|
|
[CFLAGS="$option"
|
|
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([],[])],
|
|
[AS_VAR_SET(acx_Woption, yes)],
|
|
[AS_VAR_SET(acx_Woption, no)])
|
|
])
|
|
AS_IF([test AS_VAR_GET(acx_Woption) = yes],
|
|
[WARN_CFLAGS="$WARN_CFLAGS${WARN_CFLAGS:+ }$option"])
|
|
AS_VAR_POPDEF([acx_Woption])dnl
|
|
done
|
|
CFLAGS="$save_CFLAGS"
|
|
])# ACX_PROG_CC_WARNING_OPTS
|
|
|
|
# ACX_PROG_CC_WARNING_ALMOST_PEDANTIC([-Wno-long-long ...])
|
|
# Sets WARN_PEDANTIC to "-pedantic" + the argument, if the compiler is GCC
|
|
# and accepts all of those options simultaneously, otherwise to nothing.
|
|
AC_DEFUN([ACX_PROG_CC_WARNING_ALMOST_PEDANTIC],
|
|
[AC_REQUIRE([AC_PROG_CC])dnl
|
|
AC_SUBST([WARN_PEDANTIC])dnl
|
|
AS_VAR_PUSHDEF([acx_Pedantic], [acx_cv_prog_cc_pedantic_$1])dnl
|
|
WARN_PEDANTIC=
|
|
AS_IF([test "$GCC" = yes],
|
|
[AC_CACHE_CHECK([whether $CC supports -pedantic $1], acx_Pedantic,
|
|
[save_CFLAGS="$CFLAGS"
|
|
CFLAGS="-pedantic $1"
|
|
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([],[])],
|
|
[AS_VAR_SET(acx_Pedantic, yes)],
|
|
[AS_VAR_SET(acx_Pedantic, no)])
|
|
CFLAGS="$save_CFLAGS"])
|
|
AS_IF([test AS_VAR_GET(acx_Pedantic) = yes],
|
|
[WARN_PEDANTIC="-pedantic $1"])
|
|
])
|
|
AS_VAR_POPDEF([acx_Pedantic])dnl
|
|
])# ACX_PROG_CC_WARNING_ALMOST_PEDANTIC
|
|
|
|
# ACX_PROG_CC_WARNINGS_ARE_ERRORS([x.y.z])
|
|
# sets WERROR to "-Werror" if the compiler is GCC >=x.y.z, or if
|
|
# --enable-werror-always was given on the command line, otherwise
|
|
# to nothing.
|
|
# If the argument is the word "manual" instead of a version number,
|
|
# then WERROR will be set to -Werror only if --enable-werror-always
|
|
# appeared on the configure command line.
|
|
AC_DEFUN([ACX_PROG_CC_WARNINGS_ARE_ERRORS],
|
|
[AC_REQUIRE([AC_PROG_CC])dnl
|
|
AC_SUBST([WERROR])dnl
|
|
WERROR=
|
|
AC_ARG_ENABLE(werror-always,
|
|
AS_HELP_STRING([--enable-werror-always],
|
|
[enable -Werror despite compiler version]),
|
|
[], [enable_werror_always=no])
|
|
AS_IF([test $enable_werror_always = yes],
|
|
[WERROR=-Werror],
|
|
m4_if($1, [manual],,
|
|
[AS_VAR_PUSHDEF([acx_GCCvers], [acx_cv_prog_cc_gcc_$1_or_newer])dnl
|
|
AC_CACHE_CHECK([whether $CC is GCC >=$1], acx_GCCvers,
|
|
[set fnord `echo $1 | tr '.' ' '`
|
|
shift
|
|
AC_PREPROC_IFELSE(
|
|
[#if __GNUC__ * 10000 + __GNUC_MINOR__ * 100 + __GNUC_PATCHLEVEL__ \
|
|
< [$]1 * 10000 + [$]2 * 100 + [$]3
|
|
#error insufficient
|
|
#endif],
|
|
[AS_VAR_SET(acx_GCCvers, yes)],
|
|
[AS_VAR_SET(acx_GCCvers, no)])])
|
|
AS_IF([test AS_VAR_GET(acx_GCCvers) = yes],
|
|
[WERROR=-WerrorB])
|
|
AS_VAR_POPDEF([acx_GCCvers])]))
|
|
])# ACX_PROG_CC_WARNINGS_ARE_ERRORS
|