mirror of
https://github.com/autc04/Retro68.git
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181 lines
4.1 KiB
Bash
181 lines
4.1 KiB
Bash
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#! /bin/sh
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#
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# Check that the warning flags documented in invoke.texi match up
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# with what the compiler accepts.
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#
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# Copyright (C) 2008, 2009, 2010 Free Software Foundation, Inc.
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# Written by Ralf Wildenhues <Ralf.Wildenhues@gmx.de>.
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#
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# This script is Free Software, and it can be copied, distributed and
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# modified as defined in the GNU General Public License. A copy of
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# its license can be downloaded from http://www.gnu.org/copyleft/gpl.html
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#
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# Call this script as
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# check_warning_flags.sh path/to/invoke.texi
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# with CC set to the compiler to be tested.
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# The script scribbles in the current directory.
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progname=`echo "$0" | sed 's,.*/,,'`
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usage ()
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{
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echo "usage: $progname path/to/gcc/doc"
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echo "set \$CC to the compiler to be checked"
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exit 1
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}
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ret=0
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LC_ALL=C
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export LC_ALL
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: ${CC=gcc}
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test $# = 1 || usage
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gcc_docdir=$1
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invoke_texi=$gcc_docdir/invoke.texi
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test -r "$invoke_texi" || {
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echo "$progname: error: cannot read '$invoke_texi'" >&2
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usage
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}
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filebase=check_warning_flags_file$$
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stderr=check_warning_flags_stderr$$
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remove_problematic_flags='
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/-Wlarger-than-/d
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/-Wframe-larger-than/d
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/-Wdisallowed-function-list/d
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/-W[alp],/d
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/-Werror/d
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/-Wpadded/d
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/pedantic-ms-format/d
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/=/d'
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# Ensure that indexed warnings are accepted.
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set x `sed '/^@opindex W/{
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s/^@opindex /-/
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'"$remove_problematic_flags"'
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/-W[alp]$/d
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p
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}
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d' <"$invoke_texi"`
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shift
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: >$filebase.c
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$CC -c $filebase.c "$@" 2>&1 |
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grep -v 'command line option.*is valid for.*but not for' >$stderr
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if test -s $stderr; then
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echo "options listed in @opindex but not accepted by the compiler:" >&2
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cat $stderr >&2
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ret=1
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fi
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rm -f $filebase.c $stderr
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# Check documentation of warning options.
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for lang in c c++ objc obj-c++; do
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case $lang in
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c) ext=c; langmatch='[^-]C[^+].*only' ;;
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c++) ext=C; langmatch='[^-]C++.*only' ;;
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objc) ext=m; langmatch='Objective-C[^+].*only' ;;
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obj-c++) ext=M; langmatch='Objective-C++.*only' ;;
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esac
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file=$filebase.$ext
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: >$file
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$CC -c $file 2>$stderr
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if grep 'not installed on this system' $stderr >/dev/null ||
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grep 'installation problem, cannot exec' $stderr >/dev/null ||
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grep 'error trying to exec' $stderr >/dev/null
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then
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echo "$progname: $CC is not configured for language $lang, skipping checks" >&2
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rm -f $file $filebase.o $filebase.obj $stderr
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continue
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fi
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# Verify good warning flags.
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set x `sed '
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t a
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:a
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/^@item -W/{
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/'"$langmatch"'/b x
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/ only)/d
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b x
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}
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d
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:x
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'"$remove_problematic_flags"'
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s/^@item //
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s/ .*//
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' <"$invoke_texi"`
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shift
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$CC -c $file -O "$@" 2>$stderr
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if test -s $stderr; then
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echo failures: >&2
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cat $stderr >&2
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ret=1
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fi
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# Verify bad warning flags.
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set x `sed '
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t a
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:a
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/^@item -W/{
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/ only)/!d
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/'"$langmatch"'/d
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b x
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}
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d
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:x
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'"$remove_problematic_flags"'
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s/^@item //
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s/ .*//
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' <"$invoke_texi"`
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shift
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$CC -c $file -O "$@" 2>$stderr
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# cat $stderr >&2
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test $# = `grep 'command line option.*valid.*but not for' <$stderr | wc -l` || {
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for warning
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do
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grep "command line option.*$warning.*valid" <$stderr >&2 ||
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echo "valid for $lang but not annotated as such: $warning"
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done
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ret=1
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}
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rm -f $file $filebase.o $filebase.obj $stderr
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done
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remove_problematic_help_flags='
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/^W$/d
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/^W[alp]$/d
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/^Werror-implicit-function-declaration$/d
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/^Wsynth$/d
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/-$/d
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/=/d'
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help_flags=`
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$CC --help -v 2>/dev/null | tr ' ' '\012' |
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sed -n '
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b a
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:a
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s/^-\(W[^<,]*\).*/\1/
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t x
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d
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:x
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'"$remove_problematic_help_flags"'
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p' | sort -u`
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: >$filebase.c
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for flag in $help_flags; do
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$CC -c $filebase.c -$flag 2>/dev/null || {
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echo "warning -$flag not supported" >&2
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ret=1
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}
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grep "@item.*$flag" $gcc_docdir/../*/*.texi >/dev/null || {
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# For @item, we are satisfied with either -Wfoo or -Wno-foo.
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inverted_flag=`echo "$flag" | sed '
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s/^Wno-/W/
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t
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s/^W/Wno-/'`
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grep "@item.*$inverted_flag" $gcc_docdir/../*/*.texi >/dev/null || {
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echo "warning -$flag not documented in $gcc_docdir/../*/*.texi" >&2
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ret=1
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}
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}
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done
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rm -f $filebase.c $filebase.o
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exit $ret
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