236 lines
12 KiB
Plaintext
236 lines
12 KiB
Plaintext
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# ===========================================================================
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# https://github.com/BrianAker/ddm4/
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# ===========================================================================
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#
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# SYNOPSIS
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#
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# AX_HARDEN_COMPILER_FLAGS()
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# AX_HARDEN_LINKER_FLAGS()
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# AX_HARDEN_CC_COMPILER_FLAGS()
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# AX_HARDEN_CXX_COMPILER_FLAGS()
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#
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# DESCRIPTION
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#
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# Any compiler flag that "hardens" or tests code. C99 is assumed.
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#
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# NOTE: Implementation based on AX_APPEND_FLAG.
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#
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# LICENSE
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#
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# Copyright (C) 2012 Brian Aker
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions are
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# met:
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#
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# * Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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#
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# * Redistributions in binary form must reproduce the above
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# copyright notice, this list of conditions and the following disclaimer
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# in the documentation and/or other materials provided with the
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# distribution.
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#
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# * The names of its contributors may not be used to endorse or
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# promote products derived from this software without specific prior
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# written permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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# The Following flags are not checked for
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# -Wdeclaration-after-statement is counter to C99
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# AX_APPEND_COMPILE_FLAGS([-std=c++11]) -- Not ready yet
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# AX_APPEND_COMPILE_FLAGS([-pedantic]) -- ?
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# AX_APPEND_COMPILE_FLAGS([-Wstack-protector]) -- Issues on 32bit compile
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# AX_APPEND_COMPILE_FLAGS([-fstack-protector-all]) -- Issues on 32bit compile
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# AX_APPEND_COMPILE_FLAGS([-Wlong-long]) -- Don't turn on for compatibility issues memcached_stat_st
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# AX_APPEND_COMPILE_FLAGS([-Wold-style-definition],,[$ax_append_compile_cflags_extra])
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# AX_APPEND_COMPILE_FLAGS([-std=c99],,[$ax_append_compile_cflags_extra])
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# AX_APPEND_COMPILE_FLAGS([-Wlogical-op],,[$ax_append_compile_cflags_extra])
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# AX_APPEND_COMPILE_FLAGS([-fstack-check],,[$ax_append_compile_cflags_extra]) -- problems with fastmath stack size checks
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# AX_APPEND_COMPILE_FLAGS([-floop-parallelize-all],,[$ax_append_compile_cflags_extra]) -- causes RSA verify problem on x64
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# AX_APPEND_COMPILE_FLAGS([-Wunreachable-code],,[$ax_append_compile_cflags_extra]) -- older clang and when gcc had it are buggy
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# AX_APPEND_COMPILE_FLAGS([-fPIE],,[$ax_append_compile_cflags_extra]) -- Flag for executables not libraries
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#serial 4.2
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# changes: deleted the clearing of CFLAGS
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AC_DEFUN([AX_HARDEN_LINKER_FLAGS], [
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AC_REQUIRE([AX_VCS_CHECKOUT])
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AC_REQUIRE([AX_DEBUG])
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dnl If we are inside of VCS we append -Werror, otherwise we just use it to test other flags
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AX_HARDEN_LIB=
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ax_append_compile_link_flags_extra=
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AS_IF([test "x$ac_cv_vcs_checkout" = "xyes"],[
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AX_CHECK_LINK_FLAG([-Werror],[
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AX_HARDEN_LIB="-Werror $AX_HARDEN_LIB"
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])
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],[
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AX_CHECK_LINK_FLAG([-Werror],[
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ax_append_compile_link_flags_extra='-Werror'
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])
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])
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AX_CHECK_LINK_FLAG([-z relro -z now],[
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AX_HARDEN_LIB="-z relro -z now $AX_HARDEN_LIB"
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],,[$ax_append_compile_link_flags_extra])
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AX_CHECK_LINK_FLAG([-pie],[
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AX_HARDEN_LIB="-pie $AX_HARDEN_LIB"
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],,[$ax_append_compile_link_flags_extra])
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LIB="$LIB $AX_HARDEN_LIB"
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])
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AC_DEFUN([AX_HARDEN_CC_COMPILER_FLAGS], [
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AC_REQUIRE([AX_HARDEN_LINKER_FLAGS])
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AC_LANG_PUSH([C])
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ac_cv_warnings_as_errors=no
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ax_append_compile_cflags_extra=
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AS_IF([test "$ac_cv_vcs_checkout" = "yes"],[
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AX_APPEND_COMPILE_FLAGS([-Werror])
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ac_cv_warnings_as_errors=yes
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],[
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AX_APPEND_COMPILE_FLAGS([-Werror],[ax_append_compile_cflags_extra])
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])
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AS_IF([test "$ax_enable_debug" = "yes"], [
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AX_APPEND_COMPILE_FLAGS([-g])
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AX_APPEND_COMPILE_FLAGS([-ggdb],,[$ax_append_compile_cflags_extra])
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AX_APPEND_COMPILE_FLAGS([-O0],,[$ax_append_compile_cflags_extra])
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],[])
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AX_APPEND_COMPILE_FLAGS([-Wno-pragmas],,[$ax_append_compile_cflags_extra])
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AX_APPEND_COMPILE_FLAGS([-Wall],,[$ax_append_compile_cflags_extra])
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AX_APPEND_COMPILE_FLAGS([-Wno-strict-aliasing],,[$ax_append_compile_cflags_extra])
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AX_APPEND_COMPILE_FLAGS([-Wextra],,[$ax_append_compile_cflags_extra])
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AX_APPEND_COMPILE_FLAGS([-Wunknown-pragmas],,[$ax_append_compile_cflags_extra])
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AX_APPEND_COMPILE_FLAGS([-Wthis-test-should-fail],,[$ax_append_compile_cflags_extra])
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dnl Anything below this comment please keep sorted.
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AS_IF([test "$CC" = "clang"],[],[
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AX_APPEND_COMPILE_FLAGS([--param=ssp-buffer-size=1],,[$ax_append_compile_cflags_extra])
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])
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AX_APPEND_COMPILE_FLAGS([-Waddress],,[$ax_append_compile_cflags_extra])
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AX_APPEND_COMPILE_FLAGS([-Warray-bounds],,[$ax_append_compile_cflags_extra])
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AX_APPEND_COMPILE_FLAGS([-Wbad-function-cast],,[$ax_append_compile_cflags_extra])
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dnl Not in use -Wc++-compat
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AX_APPEND_COMPILE_FLAGS([-Wchar-subscripts],,[$ax_append_compile_cflags_extra])
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AX_APPEND_COMPILE_FLAGS([-Wcomment],,[$ax_append_compile_cflags_extra])
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AX_APPEND_COMPILE_FLAGS([-Wfloat-equal],,[$ax_append_compile_cflags_extra])
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AX_APPEND_COMPILE_FLAGS([-Wformat-security],,[$ax_append_compile_cflags_extra])
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AX_APPEND_COMPILE_FLAGS([-Wformat=2],,[$ax_append_compile_cflags_extra])
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AX_APPEND_COMPILE_FLAGS([-Wmaybe-uninitialized],,[$ax_append_compile_cflags_extra])
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AX_APPEND_COMPILE_FLAGS([-Wmissing-field-initializers],,[$ax_append_compile_cflags_extra])
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AX_APPEND_COMPILE_FLAGS([-Wmissing-noreturn],,[$ax_append_compile_cflags_extra])
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AX_APPEND_COMPILE_FLAGS([-Wmissing-prototypes],,[$ax_append_compile_cflags_extra])
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AX_APPEND_COMPILE_FLAGS([-Wnested-externs],,[$ax_append_compile_cflags_extra])
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AX_APPEND_COMPILE_FLAGS([-Wnormalized=id],,[$ax_append_compile_cflags_extra])
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AX_APPEND_COMPILE_FLAGS([-Woverride-init],,[$ax_append_compile_cflags_extra])
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AX_APPEND_COMPILE_FLAGS([-Wpointer-arith],,[$ax_append_compile_cflags_extra])
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AX_APPEND_COMPILE_FLAGS([-Wpointer-sign],,[$ax_append_compile_cflags_extra])
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AX_APPEND_COMPILE_FLAGS([-Wredundant-decls],,[$ax_append_compile_cflags_extra])
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AX_APPEND_COMPILE_FLAGS([-Wshadow],,[$ax_append_compile_cflags_extra])
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AX_APPEND_COMPILE_FLAGS([-Wshorten-64-to-32],,[$ax_append_compile_cflags_extra])
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AX_APPEND_COMPILE_FLAGS([-Wsign-compare],,[$ax_append_compile_cflags_extra])
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AX_APPEND_COMPILE_FLAGS([-Wstrict-overflow=1],,[$ax_append_compile_cflags_extra])
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AX_APPEND_COMPILE_FLAGS([-Wstrict-prototypes],,[$ax_append_compile_cflags_extra])
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AX_APPEND_COMPILE_FLAGS([-Wswitch-enum],,[$ax_append_compile_cflags_extra])
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AX_APPEND_COMPILE_FLAGS([-Wundef],,[$ax_append_compile_cflags_extra])
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AX_APPEND_COMPILE_FLAGS([-Wunused],,[$ax_append_compile_cflags_extra])
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AX_APPEND_COMPILE_FLAGS([-Wunused-result],,[$ax_append_compile_cflags_extra])
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AX_APPEND_COMPILE_FLAGS([-Wunused-variable],,[$ax_append_compile_cflags_extra])
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AX_APPEND_COMPILE_FLAGS([-Wwrite-strings],,[$ax_append_compile_cflags_extra])
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AX_APPEND_COMPILE_FLAGS([-fwrapv],,[$ax_append_compile_cflags_extra])
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AC_LANG_POP
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])
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AC_DEFUN([AX_HARDEN_CXX_COMPILER_FLAGS], [
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AC_REQUIRE([AX_HARDEN_CC_COMPILER_FLAGS])
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AC_LANG_PUSH([C++])
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ax_append_compile_cxxflags_extra=
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AS_IF([test "$ac_cv_warnings_as_errors" = "yes"],[
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AX_APPEND_COMPILE_FLAGS([-Werror])
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],[
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AX_APPEND_COMPILE_FLAGS([-Werror],[ax_append_compile_cxxflags_extra])
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])
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AS_IF([test "$ax_enable_debug" = "yes" ], [
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AX_APPEND_COMPILE_FLAGS([-g],,[$ax_append_compile_cxxflags_extra])
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AX_APPEND_COMPILE_FLAGS([-O0],,[$ax_append_compile_cxxflags_extra])
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AX_APPEND_COMPILE_FLAGS([-ggdb],,[$ax_append_compile_cxxflags_extra])
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],[
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AX_APPEND_COMPILE_FLAGS([-D_FORTIFY_SOURCE=2],,[$ax_append_compile_cxxflags_extra])
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])
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AS_IF([test "$ac_cv_vcs_checkout" = "yes" ], [
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AX_APPEND_COMPILE_FLAGS([-Werror],,[$ax_append_compile_cxxflags_extra])
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],[
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AX_APPEND_COMPILE_FLAGS([-Wno-pragmas],,[$ax_append_compile_cxxflags_extra])
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])
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AX_APPEND_COMPILE_FLAGS([-Wall],,[$ax_append_compile_cxxflags_extra])
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AX_APPEND_COMPILE_FLAGS([-Wno-strict-aliasing],,[$ax_append_compile_cxxflags_extra])
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AX_APPEND_COMPILE_FLAGS([-Wextra],,[$ax_append_compile_cxxflags_extra])
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AX_APPEND_COMPILE_FLAGS([-Wunknown-pragmas],,[$ax_append_compile_cxxflags_extra])
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AX_APPEND_COMPILE_FLAGS([-Wthis-test-should-fail],,[$ax_append_compile_cxxflags_extra])
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dnl Anything below this comment please keep sorted.
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AX_APPEND_COMPILE_FLAGS([--param=ssp-buffer-size=1],,[$ax_append_compile_cxxflags_extra])
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AX_APPEND_COMPILE_FLAGS([-Waddress],,[$ax_append_compile_cxxflags_extra])
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AX_APPEND_COMPILE_FLAGS([-Warray-bounds],,[$ax_append_compile_cxxflags_extra])
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AX_APPEND_COMPILE_FLAGS([-Wchar-subscripts],,[$ax_append_compile_cxxflags_extra])
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AX_APPEND_COMPILE_FLAGS([-Wcomment],,[$ax_append_compile_cxxflags_extra])
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AX_APPEND_COMPILE_FLAGS([-Wctor-dtor-privacy],,[$ax_append_compile_cxxflags_extra])
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AX_APPEND_COMPILE_FLAGS([-Wfloat-equal],,[$ax_append_compile_cxxflags_extra])
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AX_APPEND_COMPILE_FLAGS([-Wformat=2],,[$ax_append_compile_cxxflags_extra])
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AX_APPEND_COMPILE_FLAGS([-Wmaybe-uninitialized],,[$ax_append_compile_cxxflags_extra])
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AX_APPEND_COMPILE_FLAGS([-Wmissing-field-initializers],,[$ax_append_compile_cxxflags_extra])
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AX_APPEND_COMPILE_FLAGS([-Wmissing-noreturn],,[$ax_append_compile_cxxflags_extra])
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AX_APPEND_COMPILE_FLAGS([-Wnon-virtual-dtor],,[$ax_append_compile_cxxflags_extra])
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AX_APPEND_COMPILE_FLAGS([-Wnormalized=id],,[$ax_append_compile_cxxflags_extra])
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AX_APPEND_COMPILE_FLAGS([-Woverloaded-virtual],,[$ax_append_compile_cxxflags_extra])
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AX_APPEND_COMPILE_FLAGS([-Wpointer-arith],,[$ax_append_compile_cxxflags_extra])
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AX_APPEND_COMPILE_FLAGS([-Wredundant-decls],,[$ax_append_compile_cxxflags_extra])
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AX_APPEND_COMPILE_FLAGS([-Wshadow],,[$ax_append_compile_cxxflags_extra])
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AX_APPEND_COMPILE_FLAGS([-Wshorten-64-to-32],,[$ax_append_compile_cxxflags_extra])
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AX_APPEND_COMPILE_FLAGS([-Wsign-compare],,[$ax_append_compile_cxxflags_extra])
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AX_APPEND_COMPILE_FLAGS([-Wstrict-overflow=1],,[$ax_append_compile_cxxflags_extra])
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AX_APPEND_COMPILE_FLAGS([-Wswitch-enum],,[$ax_append_compile_cxxflags_extra])
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AX_APPEND_COMPILE_FLAGS([-Wundef],,[$ax_append_compile_cxxflags_extra])
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AX_APPEND_COMPILE_FLAGS([-Wc++11-compat],,[$ax_append_compile_cxxflags_extra])
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AX_APPEND_COMPILE_FLAGS([-Wunused],,[$ax_append_compile_cxxflags_extra])
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AX_APPEND_COMPILE_FLAGS([-Wunused-result],,[$ax_append_compile_cxxflags_extra])
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AX_APPEND_COMPILE_FLAGS([-Wunused-variable],,[$ax_append_compile_cxxflags_extra])
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AX_APPEND_COMPILE_FLAGS([-Wwrite-strings],,[$ax_append_compile_cxxflags_extra])
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AX_APPEND_COMPILE_FLAGS([-Wformat-security],,[$ax_append_compile_cxxflags_extra])
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AX_APPEND_COMPILE_FLAGS([-fwrapv],,[$ax_append_compile_cxxflags_extra])
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AC_LANG_POP
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])
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AC_DEFUN([AX_HARDEN_COMPILER_FLAGS], [
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AC_REQUIRE([AX_HARDEN_CXX_COMPILER_FLAGS])
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])
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AC_DEFUN([AX_CC_OTHER_FLAGS], [
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AC_REQUIRE([AX_HARDEN_CC_COMPILER_FLAGS])
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AC_LANG_PUSH([C])
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AX_APPEND_COMPILE_FLAGS([-pipe],,[$ax_append_compile_cflags_extra])
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AC_LANG_POP
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])
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