# =========================================================================== # https://github.com/BrianAker/ddm4/ # =========================================================================== # # SYNOPSIS # # AX_HARDEN_COMPILER_FLAGS() # AX_HARDEN_LINKER_FLAGS() # AX_HARDEN_CC_COMPILER_FLAGS() # AX_HARDEN_CXX_COMPILER_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 # AX_APPEND_COMPILE_FLAGS([-std=c++11]) -- Not ready yet # AX_APPEND_COMPILE_FLAGS([-pedantic]) -- ? # AX_APPEND_COMPILE_FLAGS([-Wstack-protector]) -- Issues on 32bit compile # AX_APPEND_COMPILE_FLAGS([-fstack-protector-all]) -- Issues on 32bit compile # AX_APPEND_COMPILE_FLAGS([-Wlong-long]) -- Don't turn on for compatibility issues memcached_stat_st # AX_APPEND_COMPILE_FLAGS([-Wold-style-definition],,[$ax_append_compile_cflags_extra]) # AX_APPEND_COMPILE_FLAGS([-std=c99],,[$ax_append_compile_cflags_extra]) # AX_APPEND_COMPILE_FLAGS([-Wlogical-op],,[$ax_append_compile_cflags_extra]) # AX_APPEND_COMPILE_FLAGS([-fstack-check],,[$ax_append_compile_cflags_extra]) -- problems with fastmath stack size checks # AX_APPEND_COMPILE_FLAGS([-floop-parallelize-all],,[$ax_append_compile_cflags_extra]) -- causes RSA verify problem on x64 # AX_APPEND_COMPILE_FLAGS([-Wunreachable-code],,[$ax_append_compile_cflags_extra]) -- older clang and when gcc had it are buggy # AX_APPEND_COMPILE_FLAGS([-fPIE],,[$ax_append_compile_cflags_extra]) -- Flag for executables not libraries #serial 4.2 # changes: deleted the clearing of CFLAGS AC_DEFUN([AX_HARDEN_LINKER_FLAGS], [ AX_REQUIRE_DEFINED([AX_CHECK_LINK_FLAG]) AC_REQUIRE([AX_VCS_CHECKOUT]) AC_REQUIRE([AX_DEBUG]) dnl If we are inside of VCS we append -Werror, otherwise we just use it to test other flags AX_HARDEN_LIB= ax_append_compile_link_flags_extra= AS_IF([test "x$ac_cv_vcs_checkout" = "xyes"],[ AX_CHECK_LINK_FLAG([-Werror],[ AX_HARDEN_LIB="-Werror $AX_HARDEN_LIB" ]) ],[ AX_CHECK_LINK_FLAG([-Werror],[ ax_append_compile_link_flags_extra='-Werror' ]) ]) AX_CHECK_LINK_FLAG([-z relro -z now],[ AX_HARDEN_LIB="-z relro -z now $AX_HARDEN_LIB" ],,[$ax_append_compile_link_flags_extra]) AX_CHECK_LINK_FLAG([-pie],[ AX_HARDEN_LIB="-pie $AX_HARDEN_LIB" ],,[$ax_append_compile_link_flags_extra]) LIB="$LIB $AX_HARDEN_LIB" ]) AC_DEFUN([AX_HARDEN_CC_COMPILER_FLAGS], [ AX_REQUIRE_DEFINED([AX_APPEND_COMPILE_FLAGS]) AC_REQUIRE([AX_HARDEN_LINKER_FLAGS]) AC_LANG_PUSH([C]) ac_cv_warnings_as_errors=no ax_append_compile_cflags_extra= AS_IF([test "$ac_cv_vcs_checkout" = "yes"],[ AX_APPEND_COMPILE_FLAGS([-Werror]) ac_cv_warnings_as_errors=yes ],[ AX_APPEND_COMPILE_FLAGS([-Werror],[ax_append_compile_cflags_extra]) ]) AS_IF([test "$ax_enable_debug" = "yes"], [ AX_APPEND_COMPILE_FLAGS([-g]) AX_APPEND_COMPILE_FLAGS([-ggdb],,[$ax_append_compile_cflags_extra]) AX_APPEND_COMPILE_FLAGS([-O0],,[$ax_append_compile_cflags_extra]) ],[]) AX_APPEND_COMPILE_FLAGS([-Wno-pragmas],,[$ax_append_compile_cflags_extra]) AX_APPEND_COMPILE_FLAGS([-Wall],,[$ax_append_compile_cflags_extra]) AX_APPEND_COMPILE_FLAGS([-Wextra],,[$ax_append_compile_cflags_extra]) AX_APPEND_COMPILE_FLAGS([-Wunknown-pragmas],,[$ax_append_compile_cflags_extra]) AX_APPEND_COMPILE_FLAGS([-Wthis-test-should-fail],,[$ax_append_compile_cflags_extra]) dnl Anything below this comment please keep sorted. AS_IF([test "$CC" = "clang"],[],[ AX_APPEND_COMPILE_FLAGS([--param=ssp-buffer-size=1],,[$ax_append_compile_cflags_extra]) ]) AX_APPEND_COMPILE_FLAGS([-Waddress],,[$ax_append_compile_cflags_extra]) AX_APPEND_COMPILE_FLAGS([-Warray-bounds],,[$ax_append_compile_cflags_extra]) AX_APPEND_COMPILE_FLAGS([-Wbad-function-cast],,[$ax_append_compile_cflags_extra]) dnl Not in use -Wc++-compat AX_APPEND_COMPILE_FLAGS([-Wchar-subscripts],,[$ax_append_compile_cflags_extra]) AX_APPEND_COMPILE_FLAGS([-Wcomment],,[$ax_append_compile_cflags_extra]) AX_APPEND_COMPILE_FLAGS([-Wfloat-equal],,[$ax_append_compile_cflags_extra]) AX_APPEND_COMPILE_FLAGS([-Wformat-security],,[$ax_append_compile_cflags_extra]) AX_APPEND_COMPILE_FLAGS([-Wformat=2],,[$ax_append_compile_cflags_extra]) AX_APPEND_COMPILE_FLAGS([-Wmaybe-uninitialized],,[$ax_append_compile_cflags_extra]) AX_APPEND_COMPILE_FLAGS([-Wmissing-field-initializers],,[$ax_append_compile_cflags_extra]) AX_APPEND_COMPILE_FLAGS([-Wmissing-noreturn],,[$ax_append_compile_cflags_extra]) AX_APPEND_COMPILE_FLAGS([-Wmissing-prototypes],,[$ax_append_compile_cflags_extra]) AX_APPEND_COMPILE_FLAGS([-Wnested-externs],,[$ax_append_compile_cflags_extra]) AX_APPEND_COMPILE_FLAGS([-Wnormalized=id],,[$ax_append_compile_cflags_extra]) AX_APPEND_COMPILE_FLAGS([-Woverride-init],,[$ax_append_compile_cflags_extra]) AX_APPEND_COMPILE_FLAGS([-Wpointer-arith],,[$ax_append_compile_cflags_extra]) AX_APPEND_COMPILE_FLAGS([-Wpointer-sign],,[$ax_append_compile_cflags_extra]) AX_APPEND_COMPILE_FLAGS([-Wredundant-decls],,[$ax_append_compile_cflags_extra]) AX_APPEND_COMPILE_FLAGS([-Wshadow],,[$ax_append_compile_cflags_extra]) AX_APPEND_COMPILE_FLAGS([-Wshorten-64-to-32],,[$ax_append_compile_cflags_extra]) AX_APPEND_COMPILE_FLAGS([-Wsign-compare],,[$ax_append_compile_cflags_extra]) AX_APPEND_COMPILE_FLAGS([-Wstrict-overflow=1],,[$ax_append_compile_cflags_extra]) AX_APPEND_COMPILE_FLAGS([-Wstrict-prototypes],,[$ax_append_compile_cflags_extra]) AX_APPEND_COMPILE_FLAGS([-Wswitch-enum],,[$ax_append_compile_cflags_extra]) AX_APPEND_COMPILE_FLAGS([-Wundef],,[$ax_append_compile_cflags_extra]) AX_APPEND_COMPILE_FLAGS([-Wunused],,[$ax_append_compile_cflags_extra]) AX_APPEND_COMPILE_FLAGS([-Wunused-result],,[$ax_append_compile_cflags_extra]) AX_APPEND_COMPILE_FLAGS([-Wunused-variable],,[$ax_append_compile_cflags_extra]) AX_APPEND_COMPILE_FLAGS([-Wwrite-strings],,[$ax_append_compile_cflags_extra]) AX_APPEND_COMPILE_FLAGS([-fwrapv],,[$ax_append_compile_cflags_extra]) AC_LANG_POP ]) AC_DEFUN([AX_HARDEN_CXX_COMPILER_FLAGS], [ AC_REQUIRE_DEFINED([AX_APPEND_COMPILE_FLAGS]) AC_REQUIRE([AX_HARDEN_CC_COMPILER_FLAGS]) AC_LANG_PUSH([C++]) ax_append_compile_cxxflags_extra= AS_IF([test "$ac_cv_warnings_as_errors" = "yes"],[ AX_APPEND_COMPILE_FLAGS([-Werror]) ],[ AX_APPEND_COMPILE_FLAGS([-Werror],[ax_append_compile_cxxflags_extra]) ]) AS_IF([test "$ax_enable_debug" = "yes" ], [ AX_APPEND_COMPILE_FLAGS([-g],,[$ax_append_compile_cxxflags_extra]) AX_APPEND_COMPILE_FLAGS([-O0],,[$ax_append_compile_cxxflags_extra]) AX_APPEND_COMPILE_FLAGS([-ggdb],,[$ax_append_compile_cxxflags_extra]) ],[ AX_APPEND_COMPILE_FLAGS([-D_FORTIFY_SOURCE=2],,[$ax_append_compile_cxxflags_extra]) ]) AS_IF([test "$ac_cv_vcs_checkout" = "yes" ], [ AX_APPEND_COMPILE_FLAGS([-Werror],,[$ax_append_compile_cxxflags_extra]) ],[ AX_APPEND_COMPILE_FLAGS([-Wno-pragmas],,[$ax_append_compile_cxxflags_extra]) ]) AX_APPEND_COMPILE_FLAGS([-Wall],,[$ax_append_compile_cxxflags_extra]) AX_APPEND_COMPILE_FLAGS([-Wextra],,[$ax_append_compile_cxxflags_extra]) AX_APPEND_COMPILE_FLAGS([-Wunknown-pragmas],,[$ax_append_compile_cxxflags_extra]) AX_APPEND_COMPILE_FLAGS([-Wthis-test-should-fail],,[$ax_append_compile_cxxflags_extra]) dnl Anything below this comment please keep sorted. AX_APPEND_COMPILE_FLAGS([--param=ssp-buffer-size=1],,[$ax_append_compile_cxxflags_extra]) AX_APPEND_COMPILE_FLAGS([-Waddress],,[$ax_append_compile_cxxflags_extra]) AX_APPEND_COMPILE_FLAGS([-Warray-bounds],,[$ax_append_compile_cxxflags_extra]) AX_APPEND_COMPILE_FLAGS([-Wchar-subscripts],,[$ax_append_compile_cxxflags_extra]) AX_APPEND_COMPILE_FLAGS([-Wcomment],,[$ax_append_compile_cxxflags_extra]) AX_APPEND_COMPILE_FLAGS([-Wctor-dtor-privacy],,[$ax_append_compile_cxxflags_extra]) AX_APPEND_COMPILE_FLAGS([-Wfloat-equal],,[$ax_append_compile_cxxflags_extra]) AX_APPEND_COMPILE_FLAGS([-Wformat=2],,[$ax_append_compile_cxxflags_extra]) AX_APPEND_COMPILE_FLAGS([-Wmaybe-uninitialized],,[$ax_append_compile_cxxflags_extra]) AX_APPEND_COMPILE_FLAGS([-Wmissing-field-initializers],,[$ax_append_compile_cxxflags_extra]) AX_APPEND_COMPILE_FLAGS([-Wmissing-noreturn],,[$ax_append_compile_cxxflags_extra]) AX_APPEND_COMPILE_FLAGS([-Wnon-virtual-dtor],,[$ax_append_compile_cxxflags_extra]) AX_APPEND_COMPILE_FLAGS([-Wnormalized=id],,[$ax_append_compile_cxxflags_extra]) AX_APPEND_COMPILE_FLAGS([-Woverloaded-virtual],,[$ax_append_compile_cxxflags_extra]) AX_APPEND_COMPILE_FLAGS([-Wpointer-arith],,[$ax_append_compile_cxxflags_extra]) AX_APPEND_COMPILE_FLAGS([-Wredundant-decls],,[$ax_append_compile_cxxflags_extra]) AX_APPEND_COMPILE_FLAGS([-Wshadow],,[$ax_append_compile_cxxflags_extra]) AX_APPEND_COMPILE_FLAGS([-Wshorten-64-to-32],,[$ax_append_compile_cxxflags_extra]) AX_APPEND_COMPILE_FLAGS([-Wsign-compare],,[$ax_append_compile_cxxflags_extra]) AX_APPEND_COMPILE_FLAGS([-Wstrict-overflow=1],,[$ax_append_compile_cxxflags_extra]) AX_APPEND_COMPILE_FLAGS([-Wswitch-enum],,[$ax_append_compile_cxxflags_extra]) AX_APPEND_COMPILE_FLAGS([-Wundef],,[$ax_append_compile_cxxflags_extra]) AX_APPEND_COMPILE_FLAGS([-Wc++11-compat],,[$ax_append_compile_cxxflags_extra]) AX_APPEND_COMPILE_FLAGS([-Wunused],,[$ax_append_compile_cxxflags_extra]) AX_APPEND_COMPILE_FLAGS([-Wunused-result],,[$ax_append_compile_cxxflags_extra]) AX_APPEND_COMPILE_FLAGS([-Wunused-variable],,[$ax_append_compile_cxxflags_extra]) AX_APPEND_COMPILE_FLAGS([-Wwrite-strings],,[$ax_append_compile_cxxflags_extra]) AX_APPEND_COMPILE_FLAGS([-Wformat-security],,[$ax_append_compile_cxxflags_extra]) AX_APPEND_COMPILE_FLAGS([-fwrapv],,[$ax_append_compile_cxxflags_extra]) AC_LANG_POP ]) AC_DEFUN([AX_HARDEN_COMPILER_FLAGS], [ AC_REQUIRE([AX_HARDEN_CXX_COMPILER_FLAGS]) ]) AC_DEFUN([AX_CC_OTHER_FLAGS], [ AX_REQUIRE_DEFINED([AX_APPEND_COMPILE_FLAGS]) AC_REQUIRE([AX_HARDEN_CC_COMPILER_FLAGS]) AC_LANG_PUSH([C]) AX_APPEND_COMPILE_FLAGS([-pipe],,[$ax_append_compile_cflags_extra]) AC_LANG_POP ])