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binutils-gdb/sim/m4/sim_ac_option_warnings.m4
Andrew Burgess 1d506c26d9 Update copyright year range in header of all files managed by GDB 
This commit is the result of the following actions:

  - Running gdb/copyright.py to update all of the copyright headers to
    include 2024,

  - Manually updating a few files the copyright.py script told me to
    update, these files had copyright headers embedded within the
    file,

  - Regenerating gdbsupport/Makefile.in to refresh it's copyright
    date,

  - Using grep to find other files that still mentioned 2023.  If
    these files were updated last year from 2022 to 2023 then I've
    updated them this year to 2024.

I'm sure I've probably missed some dates.  Feel free to fix them up as
you spot them.
2024-01-12 15:49:57 +00:00

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dnl Copyright (C) 1997-2024 Free Software Foundation, Inc.
dnl
dnl This program is free software; you can redistribute it and/or modify
dnl it under the terms of the GNU General Public License as published by
dnl the Free Software Foundation; either version 3 of the License, or
dnl (at your option) any later version.
dnl
dnl This program is distributed in the hope that it will be useful,
dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
dnl GNU General Public License for more details.
dnl
dnl You should have received a copy of the GNU General Public License
dnl along with this program. If not, see <http://www.gnu.org/licenses/>.
dnl
dnl --enable-build-warnings is for developers of the simulator.
dnl it enables extra GCC specific warnings.
AC_DEFUN([SIM_AC_OPTION_WARNINGS], [dnl
AC_ARG_ENABLE(werror,
AS_HELP_STRING([--enable-werror], [treat compile warnings as errors]),
[case "${enableval}" in
yes | y) ERROR_ON_WARNING="yes" ;;
no | n) ERROR_ON_WARNING="no" ;;
*) AC_MSG_ERROR(bad value ${enableval} for --enable-werror) ;;
esac])
dnl Enable -Werror by default when using gcc. Turn it off for releases.
if test "${GCC}" = yes -a -z "${ERROR_ON_WARNING}" && $development; then
ERROR_ON_WARNING=yes
fi
WERROR_CFLAGS=""
if test "${ERROR_ON_WARNING}" = yes ; then
WERROR_CFLAGS="-Werror"
fi
dnl The options we'll try to enable.
dnl NB: Kept somewhat in sync with gdbsupport/warnings.m4.
build_warnings="-Wall -Wpointer-arith
-Wno-unused -Wunused-value -Wunused-variable -Wunused-function
-Wno-switch -Wno-char-subscripts
-Wempty-body -Wunused-but-set-parameter -Wunused-but-set-variable
-Wno-sign-compare -Wno-error=maybe-uninitialized
dnl C++ -Wno-mismatched-tags
-Wno-error=deprecated-register
dnl C++ -Wsuggest-override
-Wimplicit-fallthrough=5
-Wduplicated-cond
-Wshadow=local
dnl C++ -Wdeprecated-copy
dnl C++ -Wdeprecated-copy-dtor
dnl C++ -Wredundant-move
-Wmissing-declarations
dnl C++ -Wstrict-null-sentinel
"
dnl Some extra warnings we use in the sim.
build_warnings="$build_warnings
-Wdeclaration-after-statement
-Wdeprecated-non-prototype
-Wimplicit-function-declaration
-Wimplicit-int
-Wincompatible-function-pointer-types
-Wincompatible-pointer-types
-Wint-conversion
-Wmisleading-indentation
-Wmissing-parameter-type
-Wmissing-prototypes
-Wold-style-declaration
-Wold-style-definition
-Wpointer-sign
-Wreturn-mismatch
-Wreturn-type
-Wshift-negative-value
-Wstrict-prototypes
dnl The cgen virtual insn logic involves enum conversions.
dnl Disable until we can figure out how to make this work.
-Wno-enum-conversion
"
build_build_warnings="
dnl TODO Fix the sh/gencode.c which triggers a ton of these warnings.
-Wno-missing-braces
dnl TODO Figure out the igen code that triggers warnings w/FORTIFY_SOURCE.
-Wno-stringop-truncation
dnl Fixing this requires ATTRIBUTE_FALLTHROUGH support at build time, but we
dnl don't have gnulib there (yet).
-Wno-implicit-fallthrough
dnl TODO Enable this after cleaning up code.
-Wno-shadow=local
"
case "${host}" in
*-*-mingw32*)
# Enable -Wno-format by default when using gcc on mingw since many
# GCC versions complain about %I64.
build_warnings="$build_warnings -Wno-format" ;;
*-*-solaris*)
# Solaris 11.4 <python2.7/ceval.h> uses #pragma no_inline that GCC
# doesn't understand.
build_warnings="$build_warnings -Wno-unknown-pragmas"
# Solaris 11 <unistd.h> marks vfork deprecated.
build_warnings="$build_warnings -Wno-deprecated-declarations" ;;
*)
# Note that gcc requires -Wformat for -Wformat-nonliteral to work,
# but there's a special case for this below.
build_warnings="$build_warnings -Wformat-nonliteral" ;;
esac
AC_ARG_ENABLE(build-warnings,
AS_HELP_STRING([--enable-build-warnings], [enable build-time compiler warnings if gcc is used]),
[case "${enableval}" in
yes) ;;
no) build_warnings="-w";;
,*) t=`echo "${enableval}" | sed -e "s/,/ /g"`
build_warnings="${build_warnings} ${t}";;
*,) t=`echo "${enableval}" | sed -e "s/,/ /g"`
build_warnings="${t} ${build_warnings}";;
*) build_warnings=`echo "${enableval}" | sed -e "s/,/ /g"`;;
esac
if test x"$silent" != x"yes" && test x"$build_warnings" != x""; then
echo "Setting compiler warning flags = $build_warnings" 6>&1
fi])dnl
AC_ARG_ENABLE(sim-build-warnings,
AS_HELP_STRING([--enable-sim-build-warnings], [enable SIM specific build-time compiler warnings if gcc is used]),
[case "${enableval}" in
yes) ;;
no) build_warnings="-w";;
,*) t=`echo "${enableval}" | sed -e "s/,/ /g"`
build_warnings="${build_warnings} ${t}";;
*,) t=`echo "${enableval}" | sed -e "s/,/ /g"`
build_warnings="${t} ${build_warnings}";;
*) build_warnings=`echo "${enableval}" | sed -e "s/,/ /g"`;;
esac
if test x"$silent" != x"yes" && test x"$build_warnings" != x""; then
echo "Setting GDB specific compiler warning flags = $build_warnings" 6>&1
fi])dnl
WARN_CFLAGS=""
BUILD_WARN_CFLAGS=""
if test "x${build_warnings}" != x -a "x$GCC" = xyes
then
AC_DEFUN([_SIM_TEST_ALL_WARNING_FLAGS], [dnl
AC_MSG_CHECKING(compiler warning flags)
# Separate out the -Werror flag as some files just cannot be
# compiled with it enabled.
for w in ${build_warnings}; do
case $w in
-Werr*) WERROR_CFLAGS=-Werror ;;
*) _SIM_TEST_WARNING_FLAG($w, [WARN_CFLAGS="${WARN_CFLAGS} $w"]) ;;
esac
done
AC_MSG_RESULT(${WARN_CFLAGS} ${WERROR_CFLAGS})
])
dnl Test the host flags.
_SIM_TEST_ALL_WARNING_FLAGS
dnl Test the build flags.
AS_IF([test "x$cross_compiling" = "xno"], [dnl
SAVE_WARN_CFLAGS=$WARN_CFLAGS
build_warnings=$build_build_warnings
_SIM_TEST_ALL_WARNING_FLAGS
BUILD_WARN_CFLAGS=$WARN_CFLAGS
WARN_CFLAGS=$SAVE_WARN_CFLAGS
BUILD_WERROR_CFLAGS=$WERROR_CFLAGS
])
dnl Test individual flags to export to dedicated variables.
m4_map([_SIM_EXPORT_WARNING_FLAG], m4_split(m4_normalize([
-Wno-shadow=local
-Wno-unused-but-set-variable
])))dnl
fi
])
dnl Test a warning flag $1 and execute $2 if it passes, else $3.
AC_DEFUN([_SIM_TEST_WARNING_FLAG], [dnl
dnl GCC does not complain about -Wno-unknown-warning. Invert
dnl and test -Wunknown-warning instead.
w="$1"
case $w in
-Wno-*)
wtest=`echo $w | sed 's/-Wno-/-W/g'` ;;
-Wformat-nonliteral)
dnl gcc requires -Wformat before -Wformat-nonliteral
dnl will work, so stick them together.
w="-Wformat $w"
wtest="$w"
;;
*)
wtest=$w ;;
esac
dnl Check whether GCC accepts it.
saved_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS -Werror $wtest"
AC_TRY_COMPILE([],[],$2,$3)
CFLAGS="$saved_CFLAGS"
])
dnl Export variable $1 to $2 for use in makefiles.
AC_DEFUN([_SIM_EXPORT_WARNING], [dnl
AS_VAR_SET($1, $2)
AC_SUBST($1)
])
dnl Test if $1 is a known warning flag, and export a variable for makefiles.
dnl If $1=-Wfoo, then SIM_CFLAG_WFOO will be set to -Wfoo if it's supported.
AC_DEFUN([_SIM_EXPORT_WARNING_FLAG], [dnl
AC_MSG_CHECKING([whether $1 is supported])
_SIM_TEST_WARNING_FLAG($1, [dnl
_SIM_EXPORT_WARNING([SIM_CFLAG]m4_toupper(m4_translit($1, [-= ], [__])), $1)
AC_MSG_RESULT(yes)
], [AC_MSG_RESULT(no)])
])
AC_SUBST(WARN_CFLAGS)
AC_SUBST(WERROR_CFLAGS)
AC_SUBST(BUILD_WARN_CFLAGS)
AC_SUBST(BUILD_WERROR_CFLAGS)
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