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

   1 # ===========================================================================
   2 #      http://www.gnu.org/software/autoconf-archive/ax_append_flag.html
   3 # ===========================================================================
   4 #
   5 # SYNOPSIS
   6 #
   7 #   AX_HARDEN_COMPILER_FLAGS
   8 #
   9 # DESCRIPTION
  10 #
  11 #   Any compiler flag that "hardens" or tests code. C99 is assumed.
  12 #
  13 #   NOTE: Implementation based on AX_APPEND_FLAG.
  14 #
  15 # LICENSE
  16 #
  17 #  Copyright (C) 2012 Brian Aker
  18 #  All rights reserved.
  19 #
  20 #  Redistribution and use in source and binary forms, with or without
  21 #  modification, are permitted provided that the following conditions are
  22 #  met:
  23 #
  24 #      * Redistributions of source code must retain the above copyright
  25 #  notice, this list of conditions and the following disclaimer.
  26 #
  27 #      * Redistributions in binary form must reproduce the above
  28 #  copyright notice, this list of conditions and the following disclaimer
  29 #  in the documentation and/or other materials provided with the
  30 #  distribution.
  31 #
  32 #      * The names of its contributors may not be used to endorse or
  33 #  promote products derived from this software without specific prior
  34 #  written permission.
  35 #
  36 #  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  37 #  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  38 #  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  39 #  A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  40 #  OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  41 #  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  42 #  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  43 #  DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  44 #  THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  45 #  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  46 #  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  47
  48 # The Following flags are not checked for
  49 # -Wdeclaration-after-statement is counter to C99
  50 # AX_APPEND_COMPILE_FLAGS([-std=c++11]) -- Not ready yet
  51 # AX_APPEND_COMPILE_FLAGS([-pedantic]) -- ?
  52 # AX_APPEND_COMPILE_FLAGS([-Wstack-protector]) -- Issues on 32bit compile
  53 # AX_APPEND_COMPILE_FLAGS([-fstack-protector-all]) -- Issues on 32bit compile
  54 # AX_APPEND_COMPILE_FLAGS([-Wlong-long]) -- Don't turn on for compatibility issues memcached_stat_st
  55
  56 #serial 2
  57   AC_DEFUN([AX_HARDEN_LINKER_FLAGS], [
  58       AC_REQUIRE([AX_CHECK_LINK_FLAG])
  59       AC_REQUIRE([AX_VCS_CHECKOUT])
  60       AC_REQUIRE([AX_DEBUG])
  61
  62       AS_IF([test "$ac_cv_vcs_checkout" = yes], [
  63           AX_CHECK_LINK_FLAG([-Werror])
  64           ])
  65       AX_CHECK_LINK_FLAG([-z relro -z now])
  66       ])
  67
  68   AC_DEFUN([AX_HARDEN_C_COMPILER_FLAGS], [
  69       AC_REQUIRE([AX_APPEND_COMPILE_FLAGS])
  70       AC_REQUIRE([AX_HARDEN_LINKER_FLAGS])
  71
  72       AC_LANG_PUSH([C])
  73       AS_IF([test "$ax_with_debug" = yes], [
  74         AX_APPEND_COMPILE_FLAGS([-O0])],[
  75         AX_APPEND_COMPILE_FLAGS([-O2])
  76         ])
  77
  78       ac_cv_warnings_as_errors=no
  79       AS_IF([test "$ac_cv_vcs_checkout" = yes], [
  80         AX_APPEND_COMPILE_FLAGS([-Werror])
  81         ac_cv_warnings_as_errors=yes
  82         ])
  83
  84       AX_APPEND_COMPILE_FLAGS([-Wall])
  85       AX_APPEND_COMPILE_FLAGS([-Wextra])
  86       AX_APPEND_COMPILE_FLAGS([-std=c99])
  87       AX_APPEND_COMPILE_FLAGS([-Wbad-function-cast])
  88       AX_APPEND_COMPILE_FLAGS([-Wmissing-prototypes])
  89       AX_APPEND_COMPILE_FLAGS([-Wnested-externs])
  90       AX_APPEND_COMPILE_FLAGS([-Wold-style-definition])
  91       AX_APPEND_COMPILE_FLAGS([-Woverride-init])
  92       AX_APPEND_COMPILE_FLAGS([-Wstrict-prototypes])
  93       AX_APPEND_COMPILE_FLAGS([-Wlogical-op])
  94       AC_LANG_POP
  95
  96       ])
  97
  98   AC_DEFUN([AX_HARDEN_CC_COMPILER_FLAGS], [
  99       AC_REQUIRE([AX_HARDEN_C_COMPILER_FLAGS])
 100       AC_LANG_PUSH([C++])
 101
 102       AS_IF([test "$ax_with_debug" = yes], [
 103         AX_APPEND_COMPILE_FLAGS([-O0])],[
 104         AX_APPEND_COMPILE_FLAGS([-O2])
 105         AX_APPEND_COMPILE_FLAGS([-D_FORTIFY_SOURCE=2])
 106         ])
 107
 108       AS_IF([test "$ac_cv_vcs_checkout" = yes], [
 109         AX_APPEND_COMPILE_FLAGS([-Werror])
 110         ])
 111
 112       AX_APPEND_COMPILE_FLAGS([-Wall])
 113       AX_APPEND_COMPILE_FLAGS([-Wextra])
 114       AX_APPEND_COMPILE_FLAGS([-Wpragmas])
 115       AX_APPEND_COMPILE_FLAGS([--paramssp-buffer-size=1])
 116       AX_APPEND_COMPILE_FLAGS([-Waddress])
 117       AX_APPEND_COMPILE_FLAGS([-Warray-bounds])
 118       AX_APPEND_COMPILE_FLAGS([-Wchar-subscripts])
 119       AX_APPEND_COMPILE_FLAGS([-Wcomment])
 120       AX_APPEND_COMPILE_FLAGS([-Wctor-dtor-privacy])
 121       AX_APPEND_COMPILE_FLAGS([-Wfloat-equal])
 122       AX_APPEND_COMPILE_FLAGS([-Wformat=2])
 123       AX_APPEND_COMPILE_FLAGS([-Wmaybe-uninitialized])
 124       AX_APPEND_COMPILE_FLAGS([-Wmissing-field-initializers])
 125       AX_APPEND_COMPILE_FLAGS([-Wmissing-noreturn])
 126       AX_APPEND_COMPILE_FLAGS([-Wlogical-op])
 127       AX_APPEND_COMPILE_FLAGS([-Wnon-virtual-dtor])
 128       AX_APPEND_COMPILE_FLAGS([-Wnormalized=id])
 129       AX_APPEND_COMPILE_FLAGS([-Woverloaded-virtual])
 130       AX_APPEND_COMPILE_FLAGS([-Wpointer-arith])
 131       AX_APPEND_COMPILE_FLAGS([-Wredundant-decls])
 132       AX_APPEND_COMPILE_FLAGS([-Wshadow])
 133       AX_APPEND_COMPILE_FLAGS([-Wshorten-64-to-32])
 134       AX_APPEND_COMPILE_FLAGS([-Wsign-compare])
 135       AX_APPEND_COMPILE_FLAGS([-Wstrict-overflow=1])
 136       AX_APPEND_COMPILE_FLAGS([-Wswitch-enum])
 137       AX_APPEND_COMPILE_FLAGS([-Wundef])
 138       AX_APPEND_COMPILE_FLAGS([-Wunused-result])
 139       AX_APPEND_COMPILE_FLAGS([-Wunused-variable])
 140       AX_APPEND_COMPILE_FLAGS([-Wwrite-strings])
 141       AX_APPEND_COMPILE_FLAGS([-floop-parallelize-all])
 142       AX_APPEND_COMPILE_FLAGS([-fwrapv])
 143       AX_APPEND_COMPILE_FLAGS([-ggdb])
 144       AC_LANG_POP
 145   ])