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100 lines
3.6 KiB
Plaintext
100 lines
3.6 KiB
Plaintext
# Autoconf include file defining macros related to compile-time warnings.
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# Copyright 2004, 2005 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 2, 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 COPYING. If not, write to the Free
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#Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
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#02110-1301, USA.
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# ACX_PROG_CC_WARNING_OPTS([-Wfoo -Wbar -Wbaz])
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# Sets @WARN_CFLAGS@ 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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AC_SUBST([WARN_CFLAGS])dnl
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WARN_CFLAGS=
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save_CFLAGS="$CFLAGS"
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for option in $1; do
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AS_VAR_PUSHDEF([acx_Woption], [acx_cv_prog_cc_warning_$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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[WARN_CFLAGS="$WARN_CFLAGS${WARN_CFLAGS:+ }$option"])
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AS_VAR_POPDEF([acx_Woption])dnl
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done
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CFLAGS="$save_CFLAGS"
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])# ACX_PROG_CC_WARNING_OPTS
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# ACX_PROG_CC_WARNING_ALMOST_PEDANTIC([-Wno-long-long ...])
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# Sets WARN_PEDANTIC to "-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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AC_SUBST([WARN_PEDANTIC])dnl
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AS_VAR_PUSHDEF([acx_Pedantic], [acx_cv_prog_cc_pedantic_$1])dnl
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WARN_PEDANTIC=
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AS_IF([test "$GCC" = yes],
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[AC_CACHE_CHECK([whether $CC supports -pedantic $1], acx_Pedantic,
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[save_CFLAGS="$CFLAGS"
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CFLAGS="-pedantic $1"
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AC_COMPILE_IFELSE([AC_LANG_PROGRAM([],[])],
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[AS_VAR_SET(acx_Pedantic, yes)],
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[AS_VAR_SET(acx_Pedantic, no)])
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CFLAGS="$save_CFLAGS"])
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AS_IF([test AS_VAR_GET(acx_Pedantic) = yes],
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[WARN_PEDANTIC="-pedantic $1"])
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])
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AS_VAR_POPDEF([acx_Pedantic])dnl
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])# ACX_PROG_CC_WARNING_ALMOST_PEDANTIC
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# ACX_PROG_CC_WARNINGS_ARE_ERRORS([x.y.z])
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# sets WERROR 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 WERROR 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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AC_SUBST([WERROR])dnl
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WERROR=
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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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[WERROR=-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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[WERROR=-WerrorB])
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AS_VAR_POPDEF([acx_GCCvers])]))
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])# ACX_PROG_CC_WARNINGS_ARE_ERRORS
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