# =========================================================================== # 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 6 AC_DEFUN([_APPEND_LINK_FLAGS_ERROR], [AC_REQUIRE([AX_APPEND_LINK_FLAGS]) AX_APPEND_LINK_FLAGS([$1],[LIB],[-Werror]) ]) AC_DEFUN([_APPEND_COMPILE_FLAGS_ERROR], [AC_REQUIRE([AX_APPEND_COMPILE_FLAGS]) AX_APPEND_COMPILE_FLAGS([$1],,[-Werror]) ]) AC_DEFUN([_HARDEN_LINKER_FLAGS], [_APPEND_LINK_FLAGS_ERROR([-z relro -z now]) _APPEND_LINK_FLAGS_ERROR([-pie]) AS_IF([test "x$ac_cv_warnings_as_errors" = xyes], [_APPEND_LINK_FLAGS_ERROR([-Werror])]) ]) AC_DEFUN([_HARDEN_CC_COMPILER_FLAGS], [AC_LANG_PUSH([C])dnl _APPEND_COMPILE_FLAGS_ERROR([-g]) AS_IF([test "x$ax_enable_debug" = xyes], [_APPEND_COMPILE_FLAGS_ERROR([-ggdb]) _APPEND_COMPILE_FLAGS_ERROR([-O0])], [_APPEND_COMPILE_FLAGS_ERROR([-O2])]) _APPEND_COMPILE_FLAGS_ERROR([-Wno-pragmas]) _APPEND_COMPILE_FLAGS_ERROR([-Wall]) _APPEND_COMPILE_FLAGS_ERROR([-Wextra]) _APPEND_COMPILE_FLAGS_ERROR([-Wunknown-pragmas]) _APPEND_COMPILE_FLAGS_ERROR([-Wthis-test-should-fail]) _APPEND_COMPILE_FLAGS_ERROR([-std=c99]) # Anything below this comment please keep sorted. _APPEND_COMPILE_FLAGS_ERROR([--param=ssp-buffer-size=1]) # _APPEND_COMPILE_FLAGS_ERROR([-Wmissing-format-attribute]) _APPEND_COMPILE_FLAGS_ERROR([-Wno-attributes]) _APPEND_COMPILE_FLAGS_ERROR([-Waddress]) _APPEND_COMPILE_FLAGS_ERROR([-Warray-bounds]) _APPEND_COMPILE_FLAGS_ERROR([-Wbad-function-cast]) # Not in use -Wc++-compat _APPEND_COMPILE_FLAGS_ERROR([-Wchar-subscripts]) _APPEND_COMPILE_FLAGS_ERROR([-Wcomment]) _APPEND_COMPILE_FLAGS_ERROR([-Wfloat-equal]) _APPEND_COMPILE_FLAGS_ERROR([-Wformat-security]) _APPEND_COMPILE_FLAGS_ERROR([-Wformat=2]) _APPEND_COMPILE_FLAGS_ERROR([-Wlogical-op]) _APPEND_COMPILE_FLAGS_ERROR([-Wmaybe-uninitialized]) _APPEND_COMPILE_FLAGS_ERROR([-Wmissing-field-initializers]) AS_IF([test "x$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$MINGW" = xyes], [_APPEND_COMPILE_FLAGS_ERROR([-Wno-suggest-attribute=const]) _APPEND_COMPILE_FLAGS_ERROR([-Wno-suggest-attribute=noreturn]) _APPEND_COMPILE_FLAGS_ERROR([-Wno-suggest-attribute=pure]) _APPEND_COMPILE_FLAGS_ERROR([-Wno-redundant-decls])], [_APPEND_COMPILE_FLAGS_ERROR([-Wredundant-decls])]) _APPEND_COMPILE_FLAGS_ERROR([-Wshadow]) _APPEND_COMPILE_FLAGS_ERROR([-Wshorten-64-to-32]) _APPEND_COMPILE_FLAGS_ERROR([-Wsign-compare]) _APPEND_COMPILE_FLAGS_ERROR([-Wstrict-overflow=1]) _APPEND_COMPILE_FLAGS_ERROR([-Wstrict-prototypes]) _APPEND_COMPILE_FLAGS_ERROR([-Wswitch-enum]) _APPEND_COMPILE_FLAGS_ERROR([-Wundef]) _APPEND_COMPILE_FLAGS_ERROR([-Wunused]) _APPEND_COMPILE_FLAGS_ERROR([-Wunused-result]) _APPEND_COMPILE_FLAGS_ERROR([-Wunused-variable]) _APPEND_COMPILE_FLAGS_ERROR([-Wwrite-strings]) _APPEND_COMPILE_FLAGS_ERROR([-floop-parallelize-all]) _APPEND_COMPILE_FLAGS_ERROR([-fwrapv]) _APPEND_COMPILE_FLAGS_ERROR([-fmudflapt]) AS_IF([test "x$ac_cv_vcs_checkout" = xyes], [_APPEND_COMPILE_FLAGS_ERROR([-fstack-check]) 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_vcs_checkout" = xyes], [_APPEND_COMPILE_FLAGS_ERROR([-fstack-check])], [_APPEND_COMPILE_FLAGS_ERROR([-Wno-pragmas])]) AC_LANG_POP([C]) ]) AC_DEFUN([_HARDEN_CXX_COMPILER_FLAGS], [AC_LANG_PUSH([C++]) AC_REQUIRE([_APPEND_COMPILE_FLAGS_ERROR]) _APPEND_COMPILE_FLAGS_ERROR([-g]) AS_IF([test "x$ax_enable_debug" = xyes], [_APPEND_COMPILE_FLAGS_ERROR([-O0]) _APPEND_COMPILE_FLAGS_ERROR([-ggdb])], [_APPEND_COMPILE_FLAGS_ERROR([-O2])]) AS_IF([test "x$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$MINGW" = xyes], [_APPEND_COMPILE_FLAGS_ERROR([-Wno-suggest-attribute=const]) _APPEND_COMPILE_FLAGS_ERROR([-Wno-missing-noreturn]) _APPEND_COMPILE_FLAGS_ERROR([-Wmissing-noreturn]) _APPEND_COMPILE_FLAGS_ERROR([-Wno-suggest-attribute=noreturn]) _APPEND_COMPILE_FLAGS_ERROR([-Wno-error=suggest-attribute=noreturn]) _APPEND_COMPILE_FLAGS_ERROR([-Wno-redundant-decls])], [_APPEND_COMPILE_FLAGS_ERROR([-Wredundant-decls])]) _APPEND_COMPILE_FLAGS_ERROR([-Wshadow]) _APPEND_COMPILE_FLAGS_ERROR([-Wshorten-64-to-32]) _APPEND_COMPILE_FLAGS_ERROR([-Wsign-compare]) _APPEND_COMPILE_FLAGS_ERROR([-Wstrict-overflow=1]) _APPEND_COMPILE_FLAGS_ERROR([-Wswitch-enum]) _APPEND_COMPILE_FLAGS_ERROR([-Wundef]) _APPEND_COMPILE_FLAGS_ERROR([-Wc++11-compat]) _APPEND_COMPILE_FLAGS_ERROR([-Wunused]) _APPEND_COMPILE_FLAGS_ERROR([-Wunused-result]) _APPEND_COMPILE_FLAGS_ERROR([-Wunused-variable]) _APPEND_COMPILE_FLAGS_ERROR([-Wwrite-strings]) _APPEND_COMPILE_FLAGS_ERROR([-Wformat-security]) _APPEND_COMPILE_FLAGS_ERROR([-floop-parallelize-all]) _APPEND_COMPILE_FLAGS_ERROR([-fwrapv]) _APPEND_COMPILE_FLAGS_ERROR([-fmudflapt]) AS_IF([test "x$ac_cv_vcs_checkout" = xyes], [_APPEND_COMPILE_FLAGS_ERROR([-fstack-check]) 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], [_APPEND_COMPILE_FLAGS_ERROR([-Werror])]) AC_LANG_POP([C++]) ]) AC_DEFUN([_CC_OTHER_FLAGS], [AC_REQUIRE([_APPEND_COMPILE_FLAGS_ERROR]) AC_LANG_PUSH([C]) _APPEND_COMPILE_FLAGS_ERROR([-pipe]) AC_LANG_POP([C]) ]) # All of the heavy lifting happens in _HARDEN_LINKER_FLAGS, # _HARDEN_CC_COMPILER_FLAGS, _HARDEN_CXX_COMPILER_FLAGS, _CC_OTHER_FLAGS AC_DEFUN([AX_HARDEN_COMPILER_FLAGS], [AC_PREREQ([2.63])dnl 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 $CFLAG_VISIBILITY"]) AC_CACHE_CHECK([if all warnings into errors],[ac_cv_warnings_as_errors], [AS_IF([test "x$ac_cv_vcs_checkout" = xyes],[ac_cv_warnings_as_errors=yes], [ac_cv_warnings_as_errors=no]) ]) AC_REQUIRE([_HARDEN_LINKER_FLAGS]) AC_REQUIRE([_HARDEN_CC_COMPILER_FLAGS]) AC_REQUIRE([_HARDEN_CXX_COMPILER_FLAGS]) AC_REQUIRE([_CC_OTHER_FLAGS]) ])