mirror of git://gcc.gnu.org/git/gcc.git
118 lines
4.5 KiB
Plaintext
118 lines
4.5 KiB
Plaintext
# Autoconf include file defining macros related to compile-time warnings.
|
|
|
|
# Copyright 2004, 2005, 2007, 2009, 2011 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 3, 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 COPYING3. If not see
|
|
#<http://www.gnu.org/licenses/>.
|
|
|
|
# ACX_PROG_CC_WARNING_OPTS(WARNINGS, [VARIABLE = WARN_CFLAGS)
|
|
# Sets @VARIABLE@ to the subset of the given options which the
|
|
# compiler accepts.
|
|
AC_DEFUN([ACX_PROG_CC_WARNING_OPTS],
|
|
[AC_REQUIRE([AC_PROG_CC])dnl
|
|
m4_pushdef([acx_Var], [m4_default([$2], [WARN_CFLAGS])])dnl
|
|
AC_SUBST(acx_Var)dnl
|
|
m4_expand_once([acx_Var=
|
|
],m4_quote(acx_Var=))dnl
|
|
save_CFLAGS="$CFLAGS"
|
|
for real_option in $1; do
|
|
# Do the check with the no- prefix removed since gcc silently
|
|
# accepts any -Wno-* option on purpose
|
|
case $real_option in
|
|
-Wno-*) option=-W`expr x$real_option : 'x-Wno-\(.*\)'` ;;
|
|
*) option=$real_option ;;
|
|
esac
|
|
AS_VAR_PUSHDEF([acx_Woption], [acx_cv_prog_cc_warning_$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],
|
|
[acx_Var="$acx_Var${acx_Var:+ }$real_option"])
|
|
AS_VAR_POPDEF([acx_Woption])dnl
|
|
done
|
|
CFLAGS="$save_CFLAGS"
|
|
m4_popdef([acx_Var])dnl
|
|
])# ACX_PROG_CC_WARNING_OPTS
|
|
|
|
# ACX_PROG_CC_WARNING_ALMOST_PEDANTIC(WARNINGS, [VARIABLE = WARN_PEDANTIC])
|
|
# Append to VARIABLE "-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
|
|
m4_pushdef([acx_Var], [m4_default([$2], [WARN_PEDANTIC])])dnl
|
|
AC_SUBST(acx_Var)dnl
|
|
m4_expand_once([acx_Var=
|
|
],m4_quote(acx_Var=))dnl
|
|
# Do the check with the no- prefix removed from the warning options
|
|
# since gcc silently accepts any -Wno-* option on purpose
|
|
m4_pushdef([acx_Woptions], [m4_bpatsubst([$1], [-Wno-], [-W])])dnl
|
|
AS_VAR_PUSHDEF([acx_Pedantic], [acx_cv_prog_cc_pedantic_]acx_Woptions)dnl
|
|
AS_IF([test "$GCC" = yes],
|
|
[AC_CACHE_CHECK([whether $CC supports -pedantic ]acx_Woptions, acx_Pedantic,
|
|
[save_CFLAGS="$CFLAGS"
|
|
CFLAGS="-pedantic acx_Woptions"
|
|
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([],[])],
|
|
[AS_VAR_SET(acx_Pedantic, yes)],
|
|
[AS_VAR_SET(acx_Pedantic, no)])
|
|
CFLAGS="$save_CFLAGS"])
|
|
AS_IF([test AS_VAR_GET(acx_Pedantic) = yes],
|
|
[acx_Var="$acx_Var${acx_Var:+ }-pedantic $1"])
|
|
])
|
|
AS_VAR_POPDEF([acx_Pedantic])dnl
|
|
m4_popdef([acx_Woptions])dnl
|
|
m4_popdef([acx_Var])dnl
|
|
])# ACX_PROG_CC_WARNING_ALMOST_PEDANTIC
|
|
|
|
# ACX_PROG_CC_WARNINGS_ARE_ERRORS([x.y.z], [VARIABLE = WERROR])
|
|
# sets @VARIABLE@ 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 @VARIABLE@ 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
|
|
m4_pushdef([acx_Var], [m4_default([$2], [WERROR])])dnl
|
|
AC_SUBST(acx_Var)dnl
|
|
m4_expand_once([acx_Var=
|
|
],m4_quote(acx_Var=))dnl
|
|
AC_ARG_ENABLE(werror-always,
|
|
AS_HELP_STRING([--enable-werror-always],
|
|
[enable -Werror despite compiler version]),
|
|
[], [enable_werror_always=no])
|
|
AS_IF([test $enable_werror_always = yes],
|
|
[acx_Var="$acx_Var${acx_Var:+ }-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],
|
|
[acx_Var="$acx_Var${acx_Var:+ }-Werror"])
|
|
AS_VAR_POPDEF([acx_GCCvers])])
|
|
m4_popdef([acx_Var])dnl
|
|
])# ACX_PROG_CC_WARNINGS_ARE_ERRORS
|