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# ===========================================================================
# https://github.com/BrianAker/ddm4/
# ===========================================================================
#
# SYNOPSIS
#
# AX_HARDEN_COMPILER_FLAGS() AX_HARDEN_LINKER_FLAGS()
#
# DESCRIPTION
#
# Any compiler flag that "hardens" or tests code. C99 is assumed.
#
# NOTE: Implementation based on AX_APPEND_FLAG.
#
# LICENSE
#
# Copyright (C) 2012 Brian Aker
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
#
# * Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
#
# * Redistributions in binary form must reproduce the above
# copyright notice, this list of conditions and the following disclaimer
# in the documentation and/or other materials provided with the
# distribution.
#
# * The names of its contributors may not be used to endorse or
# promote products derived from this software without specific prior
# written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
# The Following flags are not checked for
# -Wdeclaration-after-statement is counter to C99
# _APPEND_COMPILE_FLAGS_ERROR([-std=c++11]) -- Not ready yet
# _APPEND_COMPILE_FLAGS_ERROR([-pedantic]) --
# ? _APPEND_COMPILE_FLAGS_ERROR([-Wlong-long]) -- Don't turn on for
# compatibility issues memcached_stat_st
#serial 7
AC_DEFUN([_WARNINGS_AS_ERRORS],
[AC_CACHE_CHECK([if all warnings into errors],[ac_cv_warnings_as_errors],
[AS_IF([test "x$ac_cv_vcs_checkout" = xyes],[ac_cv_warnings_as_errors=yes],
[ac_cv_warnings_as_errors=no])
])
])
# Note: Should this be LIBS or LDFLAGS?
AC_DEFUN([_APPEND_LINK_FLAGS_ERROR],
[AC_REQUIRE([AX_APPEND_LINK_FLAGS])
AX_APPEND_LINK_FLAGS([$1],[LDFLAGS],[-Werror])
])
AC_DEFUN([_APPEND_COMPILE_FLAGS_ERROR],
[AC_REQUIRE([AX_APPEND_COMPILE_FLAGS])
AX_APPEND_COMPILE_FLAGS([$1],,[-Werror])
])
# Everything above this does the heavy lifting, while what follows does the specifics.
AC_DEFUN([_HARDEN_LINKER_FLAGS],
[_APPEND_LINK_FLAGS_ERROR([-z relro -z now])
#_APPEND_LINK_FLAGS_ERROR([-pie])
AS_IF([test "x$ac_cv_warnings_as_errors" = xyes],
[AX_APPEND_LINK_FLAGS([-Werror])])
])
AC_DEFUN([_HARDEN_CC_COMPILER_FLAGS],
[AC_LANG_PUSH([C])dnl
AS_IF([test "x$ax_enable_debug" = xyes],
[CFLAGS=''
_APPEND_COMPILE_FLAGS_ERROR([-ggdb])
_APPEND_COMPILE_FLAGS_ERROR([-g])
_APPEND_COMPILE_FLAGS_ERROR([-O0])],
[_APPEND_COMPILE_FLAGS_ERROR([-g])
_APPEND_COMPILE_FLAGS_ERROR([-O2])])
AS_IF([test "x$ac_cv_vcs_checkout" = xyes],
[_APPEND_COMPILE_FLAGS_ERROR([-fstack-check])],
[_APPEND_COMPILE_FLAGS_ERROR([-Wno-pragmas])])
_APPEND_COMPILE_FLAGS_ERROR([-Wall])
_APPEND_COMPILE_FLAGS_ERROR([-Wextra])
_APPEND_COMPILE_FLAGS_ERROR([-Wunknown-pragmas])
_APPEND_COMPILE_FLAGS_ERROR([-Wthis-test-should-fail])
_APPEND_COMPILE_FLAGS_ERROR([-std=c99])
# Anything below this comment please keep sorted.
_APPEND_COMPILE_FLAGS_ERROR([--param=ssp-buffer-size=1])
# _APPEND_COMPILE_FLAGS_ERROR([-Wmissing-format-attribute])
_APPEND_COMPILE_FLAGS_ERROR([-Wno-attributes])
_APPEND_COMPILE_FLAGS_ERROR([-Waddress])
_APPEND_COMPILE_FLAGS_ERROR([-Warray-bounds])
_APPEND_COMPILE_FLAGS_ERROR([-Wbad-function-cast])
# Not in use -Wc++-compat
_APPEND_COMPILE_FLAGS_ERROR([-Wchar-subscripts])
_APPEND_COMPILE_FLAGS_ERROR([-Wcomment])
_APPEND_COMPILE_FLAGS_ERROR([-Wfloat-equal])
_APPEND_COMPILE_FLAGS_ERROR([-Wformat-security])
_APPEND_COMPILE_FLAGS_ERROR([-Wformat=2])
_APPEND_COMPILE_FLAGS_ERROR([-Wlogical-op])
_APPEND_COMPILE_FLAGS_ERROR([-Wmaybe-uninitialized])
_APPEND_COMPILE_FLAGS_ERROR([-Wmissing-field-initializers])
AS_IF([test "x$MINGW" = xyes],
[_APPEND_COMPILE_FLAGS_ERROR([-Wno-missing-noreturn])],
[_APPEND_COMPILE_FLAGS_ERROR([-Wmissing-noreturn])])
_APPEND_COMPILE_FLAGS_ERROR([-Wmissing-prototypes])
_APPEND_COMPILE_FLAGS_ERROR([-Wnested-externs])
_APPEND_COMPILE_FLAGS_ERROR([-Wnormalized=id])
_APPEND_COMPILE_FLAGS_ERROR([-Wold-style-definition])
_APPEND_COMPILE_FLAGS_ERROR([-Woverride-init])
_APPEND_COMPILE_FLAGS_ERROR([-Wpointer-arith])
_APPEND_COMPILE_FLAGS_ERROR([-Wpointer-sign])
AS_IF([test "x$MINGW" = xyes],
[_APPEND_COMPILE_FLAGS_ERROR([-Wno-suggest-attribute=const])
_APPEND_COMPILE_FLAGS_ERROR([-Wno-suggest-attribute=noreturn])
_APPEND_COMPILE_FLAGS_ERROR([-Wno-suggest-attribute=pure])
_APPEND_COMPILE_FLAGS_ERROR([-Wno-redundant-decls])],
[_APPEND_COMPILE_FLAGS_ERROR([-Wredundant-decls])])
_APPEND_COMPILE_FLAGS_ERROR([-Wshadow])
_APPEND_COMPILE_FLAGS_ERROR([-Wshorten-64-to-32])
_APPEND_COMPILE_FLAGS_ERROR([-Wsign-compare])
_APPEND_COMPILE_FLAGS_ERROR([-Wstrict-overflow=1])
_APPEND_COMPILE_FLAGS_ERROR([-Wstrict-prototypes])
_APPEND_COMPILE_FLAGS_ERROR([-Wswitch-enum])
_APPEND_COMPILE_FLAGS_ERROR([-Wundef])
_APPEND_COMPILE_FLAGS_ERROR([-Wunused])
_APPEND_COMPILE_FLAGS_ERROR([-Wunused-result])
_APPEND_COMPILE_FLAGS_ERROR([-Wunused-variable])
_APPEND_COMPILE_FLAGS_ERROR([-Wwrite-strings])
_APPEND_COMPILE_FLAGS_ERROR([-floop-parallelize-all])
_APPEND_COMPILE_FLAGS_ERROR([-fwrapv])
_APPEND_COMPILE_FLAGS_ERROR([-fmudflapt])
_APPEND_COMPILE_FLAGS_ERROR([-pipe])
AS_IF([test "x$ax_enable_debug" = xno],
[AS_IF([test "x$ac_cv_vcs_checkout" = xyes],
[AS_IF([test "x${target_os}" != "xmingw"],
[AS_IF([test "x$ac_c_gcc_recent" = xyes],
[_APPEND_COMPILE_FLAGS_ERROR([-D_FORTIFY_SOURCE=2])
#_APPEND_COMPILE_FLAGS_ERROR([-Wstack-protector])
#_APPEND_COMPILE_FLAGS_ERROR([-fstack-protector])
_APPEND_COMPILE_FLAGS_ERROR([-fstack-protector-all])
])])])])
AS_IF([test "x$ac_cv_warnings_as_errors" = xyes],
[AX_APPEND_FLAG([-Werror])])
AC_LANG_POP([C])
])
AC_DEFUN([_HARDEN_CXX_COMPILER_FLAGS],
[AC_LANG_PUSH([C++])
AC_REQUIRE([_APPEND_COMPILE_FLAGS_ERROR])
AS_IF([test "x$ax_enable_debug" = xyes],
[CXXFLAGS=''
_APPEND_COMPILE_FLAGS_ERROR([-ggdb])
_APPEND_COMPILE_FLAGS_ERROR([-g])
_APPEND_COMPILE_FLAGS_ERROR([-O0])],
[_APPEND_COMPILE_FLAGS_ERROR([-g])
_APPEND_COMPILE_FLAGS_ERROR([-O2])])
AS_IF([test "x$ac_cv_vcs_checkout" = xyes],
[_APPEND_COMPILE_FLAGS_ERROR([-fstack-check])],
[_APPEND_COMPILE_FLAGS_ERROR([-Wno-pragmas])])
_APPEND_COMPILE_FLAGS_ERROR([-Wall])
_APPEND_COMPILE_FLAGS_ERROR([-Wextra])
_APPEND_COMPILE_FLAGS_ERROR([-Wunknown-pragmas])
_APPEND_COMPILE_FLAGS_ERROR([-Wthis-test-should-fail])
# Anything below this comment please keep sorted.
_APPEND_COMPILE_FLAGS_ERROR([--param=ssp-buffer-size=1])
# _APPEND_COMPILE_FLAGS_ERROR([-Wmissing-format-attribute])
_APPEND_COMPILE_FLAGS_ERROR([-Wno-attributes])
_APPEND_COMPILE_FLAGS_ERROR([-Waddress])
_APPEND_COMPILE_FLAGS_ERROR([-Warray-bounds])
_APPEND_COMPILE_FLAGS_ERROR([-Wchar-subscripts])
_APPEND_COMPILE_FLAGS_ERROR([-Wcomment])
_APPEND_COMPILE_FLAGS_ERROR([-Wctor-dtor-privacy])
_APPEND_COMPILE_FLAGS_ERROR([-Wfloat-equal])
_APPEND_COMPILE_FLAGS_ERROR([-Wformat=2])
_APPEND_COMPILE_FLAGS_ERROR([-Wmaybe-uninitialized])
_APPEND_COMPILE_FLAGS_ERROR([-Wmissing-field-initializers])
_APPEND_COMPILE_FLAGS_ERROR([-Wlogical-op])
_APPEND_COMPILE_FLAGS_ERROR([-Wnon-virtual-dtor])
_APPEND_COMPILE_FLAGS_ERROR([-Wnormalized=id])
_APPEND_COMPILE_FLAGS_ERROR([-Woverloaded-virtual])
_APPEND_COMPILE_FLAGS_ERROR([-Wpointer-arith])
AS_IF([test "x$MINGW" = xyes],
[_APPEND_COMPILE_FLAGS_ERROR([-Wno-suggest-attribute=const])
_APPEND_COMPILE_FLAGS_ERROR([-Wno-missing-noreturn])
_APPEND_COMPILE_FLAGS_ERROR([-Wmissing-noreturn])
_APPEND_COMPILE_FLAGS_ERROR([-Wno-suggest-attribute=noreturn])
_APPEND_COMPILE_FLAGS_ERROR([-Wno-error=suggest-attribute=noreturn])
_APPEND_COMPILE_FLAGS_ERROR([-Wno-redundant-decls])],
[_APPEND_COMPILE_FLAGS_ERROR([-Wredundant-decls])])
_APPEND_COMPILE_FLAGS_ERROR([-Wshadow])
_APPEND_COMPILE_FLAGS_ERROR([-Wshorten-64-to-32])
_APPEND_COMPILE_FLAGS_ERROR([-Wsign-compare])
_APPEND_COMPILE_FLAGS_ERROR([-Wstrict-overflow=1])
_APPEND_COMPILE_FLAGS_ERROR([-Wswitch-enum])
_APPEND_COMPILE_FLAGS_ERROR([-Wundef])
_APPEND_COMPILE_FLAGS_ERROR([-Wc++11-compat])
_APPEND_COMPILE_FLAGS_ERROR([-Wunused])
_APPEND_COMPILE_FLAGS_ERROR([-Wunused-result])
_APPEND_COMPILE_FLAGS_ERROR([-Wunused-variable])
_APPEND_COMPILE_FLAGS_ERROR([-Wwrite-strings])
_APPEND_COMPILE_FLAGS_ERROR([-Wformat-security])
_APPEND_COMPILE_FLAGS_ERROR([-floop-parallelize-all])
_APPEND_COMPILE_FLAGS_ERROR([-fwrapv])
_APPEND_COMPILE_FLAGS_ERROR([-fmudflapt])
_APPEND_COMPILE_FLAGS_ERROR([-pipe])
AS_IF([test "x$ax_enable_debug" = xno],
[AS_IF([test "x$ac_cv_vcs_checkout" = xyes],
[AS_IF([test "x${target_os}" != "xmingw"],
[AS_IF([test "x$ac_c_gcc_recent" = xyes],
[_APPEND_COMPILE_FLAGS_ERROR([-D_FORTIFY_SOURCE=2])
#_APPEND_COMPILE_FLAGS_ERROR([-Wstack-protector])
#_APPEND_COMPILE_FLAGS_ERROR([-fstack-protector])
_APPEND_COMPILE_FLAGS_ERROR([-fstack-protector-all])
])])])])
AS_IF([test "x$ac_cv_warnings_as_errors" = xyes],
[AX_APPEND_FLAG([-Werror])])
AC_LANG_POP([C++])
])
# All of the heavy lifting happens in _HARDEN_LINKER_FLAGS,
# _HARDEN_CC_COMPILER_FLAGS, _HARDEN_CXX_COMPILER_FLAGS
AC_DEFUN([AX_HARDEN_COMPILER_FLAGS],
[AC_PREREQ([2.63])dnl
AC_REQUIRE([_WARNINGS_AS_ERRORS])
AC_REQUIRE([AX_APPEND_LINK_FLAGS])
AC_REQUIRE([AX_COMPILER_VERSION])
AC_REQUIRE([AX_DEBUG])
AC_REQUIRE([AX_VCS_CHECKOUT])
AC_REQUIRE([gl_VISIBILITY])
AS_IF([test -n "$CFLAG_VISIBILITY"],[CPPFLAGS="$CPPFLAGS $CFLAG_VISIBILITY"])
AC_REQUIRE([_HARDEN_LINKER_FLAGS])
AC_REQUIRE([_HARDEN_CC_COMPILER_FLAGS])
AC_REQUIRE([_HARDEN_CXX_COMPILER_FLAGS])
])
|