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[/] [openrisc/] [trunk/] [gnu-dev/] [or1k-gcc/] [contrib/] [check_warning_flags.sh] - Blame information for rev 847

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Line No. Rev Author Line
1 723 jeremybenn
#! /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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