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117 lines
4.5 KiB
117 lines
4.5 KiB
# Autoconf include file defining macros related to compile-time warnings. |
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# Copyright 2004, 2005, 2007, 2009, 2011 Free Software Foundation, Inc. |
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#This file is part of GCC. |
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#GCC is free software; you can redistribute it and/or modify it under |
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#the terms of the GNU General Public License as published by the Free |
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#Software Foundation; either version 3, or (at your option) any later |
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#version. |
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#GCC is distributed in the hope that it will be useful, but WITHOUT |
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#ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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#FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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#for more details. |
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#You should have received a copy of the GNU General Public License |
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#along with GCC; see the file COPYING3. If not see |
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#<http://www.gnu.org/licenses/>. |
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# ACX_PROG_CC_WARNING_OPTS(WARNINGS, [VARIABLE = WARN_CFLAGS) |
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# Sets @VARIABLE@ to the subset of the given options which the |
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# compiler accepts. |
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AC_DEFUN([ACX_PROG_CC_WARNING_OPTS], |
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[AC_REQUIRE([AC_PROG_CC])dnl |
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m4_pushdef([acx_Var], [m4_default([$2], [WARN_CFLAGS])])dnl |
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AC_SUBST(acx_Var)dnl |
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m4_expand_once([acx_Var= |
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],m4_quote(acx_Var=))dnl |
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save_CFLAGS="$CFLAGS" |
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for real_option in $1; do |
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# Do the check with the no- prefix removed since gcc silently |
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# accepts any -Wno-* option on purpose |
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case $real_option in |
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-Wno-*) option=-W`expr x$real_option : 'x-Wno-\(.*\)'` ;; |
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*) option=$real_option ;; |
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esac |
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AS_VAR_PUSHDEF([acx_Woption], [acx_cv_prog_cc_warning_$option]) |
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AC_CACHE_CHECK([whether $CC supports $option], acx_Woption, |
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[CFLAGS="$option" |
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AC_COMPILE_IFELSE([AC_LANG_PROGRAM([],[])], |
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[AS_VAR_SET(acx_Woption, yes)], |
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[AS_VAR_SET(acx_Woption, no)]) |
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]) |
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AS_IF([test AS_VAR_GET(acx_Woption) = yes], |
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[acx_Var="$acx_Var${acx_Var:+ }$real_option"]) |
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AS_VAR_POPDEF([acx_Woption])dnl |
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done |
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CFLAGS="$save_CFLAGS" |
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m4_popdef([acx_Var])dnl |
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])# ACX_PROG_CC_WARNING_OPTS |
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# ACX_PROG_CC_WARNING_ALMOST_PEDANTIC(WARNINGS, [VARIABLE = WARN_PEDANTIC]) |
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# Append to VARIABLE "-pedantic" + the argument, if the compiler is GCC |
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# and accepts all of those options simultaneously, otherwise to nothing. |
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AC_DEFUN([ACX_PROG_CC_WARNING_ALMOST_PEDANTIC], |
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[AC_REQUIRE([AC_PROG_CC])dnl |
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m4_pushdef([acx_Var], [m4_default([$2], [WARN_PEDANTIC])])dnl |
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AC_SUBST(acx_Var)dnl |
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m4_expand_once([acx_Var= |
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],m4_quote(acx_Var=))dnl |
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# Do the check with the no- prefix removed from the warning options |
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# since gcc silently accepts any -Wno-* option on purpose |
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m4_pushdef([acx_Woptions], [m4_bpatsubst([$1], [-Wno-], [-W])])dnl |
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AS_VAR_PUSHDEF([acx_Pedantic], [acx_cv_prog_cc_pedantic_]acx_Woptions)dnl |
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AS_IF([test "$GCC" = yes], |
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[AC_CACHE_CHECK([whether $CC supports -pedantic ]acx_Woptions, acx_Pedantic, |
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[save_CFLAGS="$CFLAGS" |
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CFLAGS="-pedantic acx_Woptions" |
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AC_COMPILE_IFELSE([AC_LANG_PROGRAM([],[])], |
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[AS_VAR_SET(acx_Pedantic, yes)], |
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[AS_VAR_SET(acx_Pedantic, no)]) |
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CFLAGS="$save_CFLAGS"]) |
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AS_IF([test AS_VAR_GET(acx_Pedantic) = yes], |
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[acx_Var="$acx_Var${acx_Var:+ }-pedantic $1"]) |
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]) |
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AS_VAR_POPDEF([acx_Pedantic])dnl |
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m4_popdef([acx_Woptions])dnl |
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m4_popdef([acx_Var])dnl |
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])# ACX_PROG_CC_WARNING_ALMOST_PEDANTIC |
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# ACX_PROG_CC_WARNINGS_ARE_ERRORS([x.y.z], [VARIABLE = WERROR]) |
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# sets @VARIABLE@ to "-Werror" if the compiler is GCC >=x.y.z, or if |
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# --enable-werror-always was given on the command line, otherwise |
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# to nothing. |
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# If the argument is the word "manual" instead of a version number, |
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# then @VARIABLE@ will be set to -Werror only if --enable-werror-always |
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# appeared on the configure command line. |
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AC_DEFUN([ACX_PROG_CC_WARNINGS_ARE_ERRORS], |
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[AC_REQUIRE([AC_PROG_CC])dnl |
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m4_pushdef([acx_Var], [m4_default([$2], [WERROR])])dnl |
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AC_SUBST(acx_Var)dnl |
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m4_expand_once([acx_Var= |
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],m4_quote(acx_Var=))dnl |
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AC_ARG_ENABLE(werror-always, |
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AS_HELP_STRING([--enable-werror-always], |
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[enable -Werror despite compiler version]), |
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[], [enable_werror_always=no]) |
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AS_IF([test $enable_werror_always = yes], |
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[acx_Var="$acx_Var${acx_Var:+ }-Werror"]) |
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m4_if($1, [manual],, |
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[AS_VAR_PUSHDEF([acx_GCCvers], [acx_cv_prog_cc_gcc_$1_or_newer])dnl |
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AC_CACHE_CHECK([whether $CC is GCC >=$1], acx_GCCvers, |
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[set fnord `echo $1 | tr '.' ' '` |
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shift |
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AC_PREPROC_IFELSE( |
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[#if __GNUC__ * 10000 + __GNUC_MINOR__ * 100 + __GNUC_PATCHLEVEL__ \ |
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< [$]1 * 10000 + [$]2 * 100 + [$]3 |
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#error insufficient |
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#endif], |
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[AS_VAR_SET(acx_GCCvers, yes)], |
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[AS_VAR_SET(acx_GCCvers, no)])]) |
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AS_IF([test AS_VAR_GET(acx_GCCvers) = yes], |
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[acx_Var="$acx_Var${acx_Var:+ }-Werror"]) |
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AS_VAR_POPDEF([acx_GCCvers])]) |
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m4_popdef([acx_Var])dnl |
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])# ACX_PROG_CC_WARNINGS_ARE_ERRORS
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