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dnl Sanitization-related configure macro for GDB
dnl Copyright (C) 2018-2020 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_UBSAN],[
AC_ARG_ENABLE(ubsan,
AS_HELP_STRING([--enable-ubsan],
[enable undefined behavior sanitizer (auto/yes/no)]),
[],enable_ubsan=no)
if test "x$enable_ubsan" = xauto; then
if $development; then
enable_ubsan=yes
fi
fi
AC_LANG_PUSH([C++])
if test "x$enable_ubsan" = xyes; then
AC_MSG_CHECKING(whether -fsanitize=undefined is accepted)
saved_CXXFLAGS="$CXXFLAGS"
CXXFLAGS="$CXXFLAGS -fsanitize=undefined -fno-sanitize-recover=undefined"
dnl A link check is required because it is possible to install gcc
dnl without libubsan, leading to link failures when compiling with
dnl -fsanitize=undefined.
AC_LINK_IFELSE(
[AC_LANG_PROGRAM([], [])],
[enable_ubsan=yes],
[enable_ubsan=no]
)
CXXFLAGS="$saved_CXXFLAGS"
AC_MSG_RESULT($enable_ubsan)
if test "x$enable_ubsan" = xyes; then
WARN_CFLAGS="$WARN_CFLAGS -fsanitize=undefined -fno-sanitize-recover=undefined"
CONFIG_LDFLAGS="$CONFIG_LDFLAGS -fsanitize=undefined"
fi
fi
AC_LANG_POP([C++])
])
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