| dnl Sanitization-related configure macro for GDB |
| dnl Copyright (C) 2018-2021 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++]) |
| ]) |