| dnl Autoconf configure script for GDB, the GNU debugger. |
| dnl Copyright (C) 1995-2016 Free Software Foundation, Inc. |
| dnl |
| dnl This file is part of GDB. |
| 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/>. |
| |
| AC_DEFUN([AM_GDB_WARNINGS],[ |
| 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 ${enableval} for --enable-werror) ;; |
| esac]) |
| |
| # Enable -Werror by default when using gcc. Turn it off for releases. |
| if test "${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 |
| |
| # The options we'll try to enable. |
| build_warnings="-Wall -Wpointer-arith \ |
| -Wno-unused -Wunused-value -Wunused-function \ |
| -Wno-switch -Wno-char-subscripts \ |
| -Wempty-body -Wunused-but-set-parameter -Wunused-but-set-variable \ |
| -Wno-sign-compare -Wno-write-strings -Wno-narrowing" |
| |
| # Enable -Wno-format by default when using gcc on mingw since many |
| # GCC versions complain about %I64. |
| case "${host}" in |
| *-*-mingw32*) build_warnings="$build_warnings -Wno-format" ;; |
| *) 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 = $build_warnings" 6>&1 |
| fi])dnl |
| AC_ARG_ENABLE(gdb-build-warnings, |
| AS_HELP_STRING([--enable-gdb-build-warnings], [enable GDB specific build-time compiler warnings if gcc is used]), |
| [case "${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 = $build_warnings" 6>&1 |
| fi])dnl |
| |
| # The set of warnings supported by a C++ compiler is not the same as |
| # of the C compiler. |
| AC_LANG_PUSH([C++]) |
| |
| WARN_CFLAGS="" |
| if test "x${build_warnings}" != x -a "x$GCC" = xyes |
| then |
| 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 |
| # GCC does not complain about -Wno-unknown-warning. Invert |
| # and test -Wunknown-warning instead. |
| case $w in |
| -Wno-*) |
| wtest=`echo $w | sed 's/-Wno-/-W/g'` ;; |
| *) |
| wtest=$w ;; |
| esac |
| |
| case $w in |
| -Werr*) WERROR_CFLAGS=-Werror ;; |
| *) |
| # Check whether GCC accepts it. |
| saved_CFLAGS="$CFLAGS" |
| CFLAGS="$CFLAGS $wtest" |
| saved_CXXFLAGS="$CXXFLAGS" |
| CXXFLAGS="$CXXFLAGS $wtest" |
| AC_TRY_COMPILE([],[],WARN_CFLAGS="${WARN_CFLAGS} $w",) |
| CFLAGS="$saved_CFLAGS" |
| CXXFLAGS="$saved_CXXFLAGS" |
| esac |
| done |
| AC_MSG_RESULT(${WARN_CFLAGS} ${WERROR_CFLAGS}) |
| fi |
| AC_SUBST(WARN_CFLAGS) |
| AC_SUBST(WERROR_CFLAGS) |
| |
| AC_LANG_POP([C++]) |
| ]) |