git.m6w6.name Git - awesomized/libmemcached/blob - m4/ax_harden_compiler_flags.m4

   1 # ===========================================================================
   2 #      https://github.com/BrianAker/ddm4/
   3 # ===========================================================================
   4 #
   5 # SYNOPSIS
   6 #
   7 #   AX_HARDEN_COMPILER_FLAGS()
   8 #   AX_HARDEN_LINKER_FLAGS()
   9 #   AX_HARDEN_CC_COMPILER_FLAGS()
  10 #   AX_HARDEN_CXX_COMPILER_FLAGS()
  11 #
  12 # DESCRIPTION
  13 #
  14 #   Any compiler flag that "hardens" or tests code. C99 is assumed.
  15 #
  16 #   NOTE: Implementation based on AX_APPEND_FLAG.
  17 #
  18 # LICENSE
  19 #
  20 #  Copyright (C) 2012 Brian Aker
  21 #  All rights reserved.
  22 #
  23 #  Redistribution and use in source and binary forms, with or without
  24 #  modification, are permitted provided that the following conditions are
  25 #  met:
  26 #
  27 #      * Redistributions of source code must retain the above copyright
  28 #  notice, this list of conditions and the following disclaimer.
  29 #
  30 #      * Redistributions in binary form must reproduce the above
  31 #  copyright notice, this list of conditions and the following disclaimer
  32 #  in the documentation and/or other materials provided with the
  33 #  distribution.
  34 #
  35 #      * The names of its contributors may not be used to endorse or
  36 #  promote products derived from this software without specific prior
  37 #  written permission.
  38 #
  39 #  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  40 #  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  41 #  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  42 #  A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  43 #  OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  44 #  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  45 #  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  46 #  DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  47 #  THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  48 #  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  49 #  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  50
  51 # The Following flags are not checked for
  52 # -Wdeclaration-after-statement is counter to C99
  53 # AX_APPEND_COMPILE_FLAGS([-std=c++11]) -- Not ready yet
  54 # AX_APPEND_COMPILE_FLAGS([-pedantic]) -- ?
  55 # AX_APPEND_COMPILE_FLAGS([-Wstack-protector]) -- Issues on 32bit compile
  56 # AX_APPEND_COMPILE_FLAGS([-fstack-protector-all]) -- Issues on 32bit compile
  57 # AX_APPEND_COMPILE_FLAGS([-Wlong-long]) -- Don't turn on for compatibility issues memcached_stat_st
  58
  59 #serial 3
  60
  61   AC_DEFUN([AX_HARDEN_LINKER_FLAGS], [
  62       AC_REQUIRE([AX_CHECK_LINK_FLAG])
  63       AC_REQUIRE([AX_VCS_CHECKOUT])
  64       AC_REQUIRE([AX_DEBUG])
  65       AC_REQUIRE([AX_CXX_COMPILER_VERSION])
  66
  67       ax_append_compile_flags_extra=
  68       AS_IF([test "$CLANG" = "yes"],[ax_append_compile_flags_extra="-Werror"])
  69
  70       AS_IF([test "$ac_cv_vcs_checkout" = yes], [
  71           AX_CHECK_LINK_FLAG([-Werror])
  72           ax_append_compile_flags_extra=
  73           ])
  74       AX_CHECK_LINK_FLAG([-z relro -z now],,[$ax_append_compile_flags_extra])
  75       AX_CHECK_LINK_FLAG([-pie],,[$ax_append_compile_flags_extra])
  76       ])
  77
  78   AC_DEFUN([AX_HARDEN_CC_COMPILER_FLAGS], [
  79       AC_REQUIRE([AX_APPEND_COMPILE_FLAGS])
  80       AC_REQUIRE([AX_HARDEN_LINKER_FLAGS])
  81
  82       AC_LANG_PUSH([C])
  83       CFLAGS=
  84
  85       AX_APPEND_COMPILE_FLAGS([-g])
  86       AS_IF([test "$ax_enable_debug" = yes], [
  87         AX_APPEND_COMPILE_FLAGS([-ggdb],,[$ax_append_compile_flags_extra])
  88         AX_APPEND_COMPILE_FLAGS([-O0],,[$ax_append_compile_flags_extra])
  89         ],[
  90         AX_APPEND_COMPILE_FLAGS([-O2],,[$ax_append_compile_flags_extra])
  91         ])
  92
  93       ac_cv_warnings_as_errors=no
  94       AS_IF([test "$ac_cv_vcs_checkout" = yes], [
  95         AX_APPEND_COMPILE_FLAGS([-Werror],,[$ax_append_compile_flags_extra])
  96         AX_APPEND_COMPILE_FLAGS([-fstack-check],,[$ax_append_compile_flags_extra])
  97         ac_cv_warnings_as_errors=yes
  98         ],[
  99         AX_APPEND_COMPILE_FLAGS([-Wno-pragmas],,[$ax_append_compile_flags_extra])
 100         ])
 101
 102       AX_APPEND_COMPILE_FLAGS([-Wall],,[$ax_append_compile_flags_extra])
 103       AX_APPEND_COMPILE_FLAGS([-Wextra],,[$ax_append_compile_flags_extra])
 104       AX_APPEND_COMPILE_FLAGS([-Wunknown-pragmas],,[$ax_append_compile_flags_extra])
 105       AX_APPEND_COMPILE_FLAGS([-Wthis-test-should-fail],,[$ax_append_compile_flags_extra])
 106       AX_APPEND_COMPILE_FLAGS([-std=c99],,[$ax_append_compile_flags_extra])
 107       dnl Anything below this comment please keep sorted.
 108       AX_APPEND_COMPILE_FLAGS([--param=ssp-buffer-size=1],,[$ax_append_compile_flags_extra])
 109       AX_APPEND_COMPILE_FLAGS([-Waddress],,[$ax_append_compile_flags_extra])
 110       AX_APPEND_COMPILE_FLAGS([-Warray-bounds],,[$ax_append_compile_flags_extra])
 111       AX_APPEND_COMPILE_FLAGS([-Wbad-function-cast],,[$ax_append_compile_flags_extra])
 112       dnl Not in use -Wc++-compat
 113       AX_APPEND_COMPILE_FLAGS([-Wchar-subscripts],,[$ax_append_compile_flags_extra])
 114       AX_APPEND_COMPILE_FLAGS([-Wcomment],,[$ax_append_compile_flags_extra])
 115       AX_APPEND_COMPILE_FLAGS([-Wfloat-equal],,[$ax_append_compile_flags_extra])
 116       AX_APPEND_COMPILE_FLAGS([-Wformat-security],,[$ax_append_compile_flags_extra])
 117       AX_APPEND_COMPILE_FLAGS([-Wformat=2],,[$ax_append_compile_flags_extra])
 118       AX_APPEND_COMPILE_FLAGS([-Wlogical-op],,[$ax_append_compile_flags_extra])
 119       AX_APPEND_COMPILE_FLAGS([-Wmaybe-uninitialized],,[$ax_append_compile_flags_extra])
 120       AX_APPEND_COMPILE_FLAGS([-Wmissing-field-initializers],,[$ax_append_compile_flags_extra])
 121       AX_APPEND_COMPILE_FLAGS([-Wmissing-noreturn],,[$ax_append_compile_flags_extra])
 122       AX_APPEND_COMPILE_FLAGS([-Wmissing-prototypes],,[$ax_append_compile_flags_extra])
 123       AX_APPEND_COMPILE_FLAGS([-Wnested-externs],,[$ax_append_compile_flags_extra])
 124       AX_APPEND_COMPILE_FLAGS([-Wnormalized=id],,[$ax_append_compile_flags_extra])
 125       AX_APPEND_COMPILE_FLAGS([-Wold-style-definition],,[$ax_append_compile_flags_extra])
 126       AX_APPEND_COMPILE_FLAGS([-Woverride-init],,[$ax_append_compile_flags_extra])
 127       AX_APPEND_COMPILE_FLAGS([-Wpointer-arith],,[$ax_append_compile_flags_extra])
 128       AX_APPEND_COMPILE_FLAGS([-Wpointer-sign],,[$ax_append_compile_flags_extra])
 129       AX_APPEND_COMPILE_FLAGS([-Wredundant-decls],,[$ax_append_compile_flags_extra])
 130       AX_APPEND_COMPILE_FLAGS([-Wshadow],,[$ax_append_compile_flags_extra])
 131       AX_APPEND_COMPILE_FLAGS([-Wshorten-64-to-32],,[$ax_append_compile_flags_extra])
 132       AX_APPEND_COMPILE_FLAGS([-Wsign-compare],,[$ax_append_compile_flags_extra])
 133       AX_APPEND_COMPILE_FLAGS([-Wstrict-overflow=1],,[$ax_append_compile_flags_extra])
 134       AX_APPEND_COMPILE_FLAGS([-Wstrict-prototypes],,[$ax_append_compile_flags_extra])
 135       AX_APPEND_COMPILE_FLAGS([-Wswitch-enum],,[$ax_append_compile_flags_extra])
 136       AX_APPEND_COMPILE_FLAGS([-Wundef],,[$ax_append_compile_flags_extra])
 137       AX_APPEND_COMPILE_FLAGS([-Wunused-result],,[$ax_append_compile_flags_extra])
 138       AX_APPEND_COMPILE_FLAGS([-Wunused-variable],,[$ax_append_compile_flags_extra])
 139       AX_APPEND_COMPILE_FLAGS([-Wwrite-strings],,[$ax_append_compile_flags_extra])
 140       AX_APPEND_COMPILE_FLAGS([-floop-parallelize-all],,[$ax_append_compile_flags_extra])
 141       AX_APPEND_COMPILE_FLAGS([-fwrapv],,[$ax_append_compile_flags_extra])
 142       AC_LANG_POP
 143
 144       ])
 145
 146   AC_DEFUN([AX_HARDEN_CXX_COMPILER_FLAGS], [
 147       AC_REQUIRE([AX_HARDEN_CC_COMPILER_FLAGS])
 148       AC_LANG_PUSH([C++])
 149       CXXFLAGS=
 150
 151       AX_APPEND_COMPILE_FLAGS([-g],,[$ax_append_compile_flags_extra])
 152       AS_IF([test "$ax_enable_debug" = yes], [
 153         AX_APPEND_COMPILE_FLAGS([-O0],,[$ax_append_compile_flags_extra])
 154         AX_APPEND_COMPILE_FLAGS([-ggdb],,[$ax_append_compile_flags_extra])
 155         ],[
 156         AX_APPEND_COMPILE_FLAGS([-O2],,[$ax_append_compile_flags_extra])
 157         AX_APPEND_COMPILE_FLAGS([-D_FORTIFY_SOURCE=2],,[$ax_append_compile_flags_extra])
 158         ])
 159
 160       AS_IF([test "$ac_cv_vcs_checkout" = yes], [
 161         AX_APPEND_COMPILE_FLAGS([-Werror],,[$ax_append_compile_flags_extra])
 162         AX_APPEND_COMPILE_FLAGS([-fstack-check],,[$ax_append_compile_flags_extra])
 163         ],[
 164         AX_APPEND_COMPILE_FLAGS([-Wno-pragmas],,[$ax_append_compile_flags_extra])
 165         ])
 166
 167       AX_APPEND_COMPILE_FLAGS([-Wall],,[$ax_append_compile_flags_extra])
 168       AX_APPEND_COMPILE_FLAGS([-Wextra],,[$ax_append_compile_flags_extra])
 169       AX_APPEND_COMPILE_FLAGS([-Wunknown-pragmas],,[$ax_append_compile_flags_extra])
 170       AX_APPEND_COMPILE_FLAGS([-Wthis-test-should-fail],,[$ax_append_compile_flags_extra])
 171       dnl Anything below this comment please keep sorted.
 172       AX_APPEND_COMPILE_FLAGS([--param=ssp-buffer-size=1],,[$ax_append_compile_flags_extra])
 173       AX_APPEND_COMPILE_FLAGS([-Waddress],,[$ax_append_compile_flags_extra])
 174       AX_APPEND_COMPILE_FLAGS([-Warray-bounds],,[$ax_append_compile_flags_extra])
 175       AX_APPEND_COMPILE_FLAGS([-Wchar-subscripts],,[$ax_append_compile_flags_extra])
 176       AX_APPEND_COMPILE_FLAGS([-Wcomment],,[$ax_append_compile_flags_extra])
 177       AX_APPEND_COMPILE_FLAGS([-Wctor-dtor-privacy],,[$ax_append_compile_flags_extra])
 178       AX_APPEND_COMPILE_FLAGS([-Wfloat-equal],,[$ax_append_compile_flags_extra])
 179       AX_APPEND_COMPILE_FLAGS([-Wformat=2],,[$ax_append_compile_flags_extra])
 180       AX_APPEND_COMPILE_FLAGS([-Wmaybe-uninitialized],,[$ax_append_compile_flags_extra])
 181       AX_APPEND_COMPILE_FLAGS([-Wmissing-field-initializers],,[$ax_append_compile_flags_extra])
 182       AX_APPEND_COMPILE_FLAGS([-Wmissing-noreturn],,[$ax_append_compile_flags_extra])
 183       AX_APPEND_COMPILE_FLAGS([-Wlogical-op],,[$ax_append_compile_flags_extra])
 184       AX_APPEND_COMPILE_FLAGS([-Wnon-virtual-dtor],,[$ax_append_compile_flags_extra])
 185       AX_APPEND_COMPILE_FLAGS([-Wnormalized=id],,[$ax_append_compile_flags_extra])
 186       AX_APPEND_COMPILE_FLAGS([-Woverloaded-virtual],,[$ax_append_compile_flags_extra])
 187       AX_APPEND_COMPILE_FLAGS([-Wpointer-arith],,[$ax_append_compile_flags_extra])
 188       AX_APPEND_COMPILE_FLAGS([-Wredundant-decls],,[$ax_append_compile_flags_extra])
 189       AX_APPEND_COMPILE_FLAGS([-Wshadow],,[$ax_append_compile_flags_extra])
 190       AX_APPEND_COMPILE_FLAGS([-Wshorten-64-to-32],,[$ax_append_compile_flags_extra])
 191       AX_APPEND_COMPILE_FLAGS([-Wsign-compare],,[$ax_append_compile_flags_extra])
 192       AX_APPEND_COMPILE_FLAGS([-Wstrict-overflow=1],,[$ax_append_compile_flags_extra])
 193       AX_APPEND_COMPILE_FLAGS([-Wswitch-enum],,[$ax_append_compile_flags_extra])
 194       AX_APPEND_COMPILE_FLAGS([-Wundef],,[$ax_append_compile_flags_extra])
 195       AX_APPEND_COMPILE_FLAGS([-Wc++11-compat],,[$ax_append_compile_flags_extra])
 196       AX_APPEND_COMPILE_FLAGS([-Wunused-result],,[$ax_append_compile_flags_extra])
 197       AX_APPEND_COMPILE_FLAGS([-Wunused-variable],,[$ax_append_compile_flags_extra])
 198       AX_APPEND_COMPILE_FLAGS([-Wwrite-strings],,[$ax_append_compile_flags_extra])
 199       AX_APPEND_COMPILE_FLAGS([-Wformat-security],,[$ax_append_compile_flags_extra])
 200       AX_APPEND_COMPILE_FLAGS([-floop-parallelize-all],,[$ax_append_compile_flags_extra])
 201       AX_APPEND_COMPILE_FLAGS([-fwrapv],,[$ax_append_compile_flags_extra])
 202       AC_LANG_POP
 203   ])
 204
 205   AC_DEFUN([AX_HARDEN_COMPILER_FLAGS], [
 206       AC_REQUIRE([AX_HARDEN_CXX_COMPILER_FLAGS],,[$ax_append_compile_flags_extra])
 207       ])
 208
 209   AC_DEFUN([AX_CC_OTHER_FLAGS], [
 210       AC_REQUIRE([AX_APPEND_COMPILE_FLAGS])
 211       AC_REQUIRE([AX_HARDEN_LINKER_FLAGS])
 212
 213       AC_LANG_PUSH([C])
 214       AX_APPEND_COMPILE_FLAGS([-pipe],,[$ax_append_compile_flags_extra])
 215       AC_LANG_POP
 216       ])