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 "$ac_cv_vcs_checkout" = yes], [
  63           AX_CHECK_LINK_FLAG([-Werror])
  64           ])
  65       AX_CHECK_LINK_FLAG([-z relro -z now])
  66       AX_CHECK_LINK_FLAG([-pie])
  67       ])
  68
  69   AC_DEFUN([AX_HARDEN_C_COMPILER_FLAGS], [
  70       AC_REQUIRE([AX_APPEND_COMPILE_FLAGS])
  71       AC_REQUIRE([AX_HARDEN_LINKER_FLAGS])
  72
  73       AC_LANG_PUSH([C])
  74       AS_IF([test "$ax_with_debug" = yes], [
  75         AX_APPEND_COMPILE_FLAGS([-O0])],[
  76         AX_APPEND_COMPILE_FLAGS([-O2])
  77         ])
  78
  79       ac_cv_warnings_as_errors=no
  80       AS_IF([test "$ac_cv_vcs_checkout" = yes], [
  81         AX_APPEND_COMPILE_FLAGS([-Werror])
  82         ac_cv_warnings_as_errors=yes
  83         ])
  84
  85       AX_APPEND_COMPILE_FLAGS([-Wall])
  86       AX_APPEND_COMPILE_FLAGS([-Wextra])
  87       AX_APPEND_COMPILE_FLAGS([-std=c99])
  88       AX_APPEND_COMPILE_FLAGS([-Wpragmas])
  89       dnl Anything below this comment please keep sorted.
  90       AX_APPEND_COMPILE_FLAGS([--paramssp-buffer-size=1])
  91       AX_APPEND_COMPILE_FLAGS([-Waddress])
  92       AX_APPEND_COMPILE_FLAGS([-Warray-bounds])
  93       AX_APPEND_COMPILE_FLAGS([-Wbad-function-cast])
  94       AX_APPEND_COMPILE_FLAGS([-Wc++-compat])
  95       AX_APPEND_COMPILE_FLAGS([-Wchar-subscripts])
  96       AX_APPEND_COMPILE_FLAGS([-Wcomment])
  97       AX_APPEND_COMPILE_FLAGS([-Wfloat-equal])
  98       AX_APPEND_COMPILE_FLAGS([-Wformat-security])
  99       AX_APPEND_COMPILE_FLAGS([-Wformat=2])
 100       AX_APPEND_COMPILE_FLAGS([-Wlogical-op])
 101       AX_APPEND_COMPILE_FLAGS([-Wmaybe-uninitialized])
 102       AX_APPEND_COMPILE_FLAGS([-Wmissing-field-initializers])
 103       AX_APPEND_COMPILE_FLAGS([-Wmissing-noreturn])
 104       AX_APPEND_COMPILE_FLAGS([-Wmissing-prototypes])
 105       AX_APPEND_COMPILE_FLAGS([-Wnested-externs])
 106       AX_APPEND_COMPILE_FLAGS([-Wnormalized=id])
 107       AX_APPEND_COMPILE_FLAGS([-Wold-style-definition])
 108       AX_APPEND_COMPILE_FLAGS([-Woverride-init])
 109       AX_APPEND_COMPILE_FLAGS([-Wpointer-arith])
 110       AX_APPEND_COMPILE_FLAGS([-Wpointer-sign])
 111       AX_APPEND_COMPILE_FLAGS([-Wredundant-decls])
 112       AX_APPEND_COMPILE_FLAGS([-Wshadow])
 113       AX_APPEND_COMPILE_FLAGS([-Wshorten-64-to-32])
 114       AX_APPEND_COMPILE_FLAGS([-Wsign-compare])
 115       AX_APPEND_COMPILE_FLAGS([-Wstrict-overflow=1])
 116       AX_APPEND_COMPILE_FLAGS([-Wstrict-prototypes])
 117       AX_APPEND_COMPILE_FLAGS([-Wswitch-enum])
 118       AX_APPEND_COMPILE_FLAGS([-Wundef])
 119       AX_APPEND_COMPILE_FLAGS([-Wunused-result])
 120       AX_APPEND_COMPILE_FLAGS([-Wunused-variable])
 121       AX_APPEND_COMPILE_FLAGS([-Wwrite-strings])
 122       AX_APPEND_COMPILE_FLAGS([-floop-parallelize-all])
 123       AX_APPEND_COMPILE_FLAGS([-fwrapv])
 124       AX_APPEND_COMPILE_FLAGS([-ggdb])
 125       AC_LANG_POP
 126
 127       ])
 128
 129   AC_DEFUN([AX_HARDEN_CC_COMPILER_FLAGS], [
 130       AC_REQUIRE([AX_HARDEN_C_COMPILER_FLAGS])
 131       AC_LANG_PUSH([C++])
 132
 133       AS_IF([test "$ax_with_debug" = yes], [
 134         AX_APPEND_COMPILE_FLAGS([-O0])],[
 135         AX_APPEND_COMPILE_FLAGS([-O2])
 136         AX_APPEND_COMPILE_FLAGS([-D_FORTIFY_SOURCE=2])
 137         ])
 138
 139       AS_IF([test "$ac_cv_vcs_checkout" = yes], [
 140         AX_APPEND_COMPILE_FLAGS([-Werror])
 141         ])
 142
 143       AX_APPEND_COMPILE_FLAGS([-Wall])
 144       AX_APPEND_COMPILE_FLAGS([-Wextra])
 145       AX_APPEND_COMPILE_FLAGS([-Wpragmas])
 146       dnl Anything below this comment please keep sorted.
 147       AX_APPEND_COMPILE_FLAGS([--paramssp-buffer-size=1])
 148       AX_APPEND_COMPILE_FLAGS([-Waddress])
 149       AX_APPEND_COMPILE_FLAGS([-Warray-bounds])
 150       AX_APPEND_COMPILE_FLAGS([-Wchar-subscripts])
 151       AX_APPEND_COMPILE_FLAGS([-Wcomment])
 152       AX_APPEND_COMPILE_FLAGS([-Wctor-dtor-privacy])
 153       AX_APPEND_COMPILE_FLAGS([-Wfloat-equal])
 154       AX_APPEND_COMPILE_FLAGS([-Wformat=2])
 155       AX_APPEND_COMPILE_FLAGS([-Wmaybe-uninitialized])
 156       AX_APPEND_COMPILE_FLAGS([-Wmissing-field-initializers])
 157       AX_APPEND_COMPILE_FLAGS([-Wmissing-noreturn])
 158       AX_APPEND_COMPILE_FLAGS([-Wlogical-op])
 159       AX_APPEND_COMPILE_FLAGS([-Wnon-virtual-dtor])
 160       AX_APPEND_COMPILE_FLAGS([-Wnormalized=id])
 161       AX_APPEND_COMPILE_FLAGS([-Woverloaded-virtual])
 162       AX_APPEND_COMPILE_FLAGS([-Wpointer-arith])
 163       AX_APPEND_COMPILE_FLAGS([-Wredundant-decls])
 164       AX_APPEND_COMPILE_FLAGS([-Wshadow])
 165       AX_APPEND_COMPILE_FLAGS([-Wshorten-64-to-32])
 166       AX_APPEND_COMPILE_FLAGS([-Wsign-compare])
 167       AX_APPEND_COMPILE_FLAGS([-Wstrict-overflow=1])
 168       AX_APPEND_COMPILE_FLAGS([-Wswitch-enum])
 169       AX_APPEND_COMPILE_FLAGS([-Wundef])
 170       AX_APPEND_COMPILE_FLAGS([-Wc++11-compat])
 171       AX_APPEND_COMPILE_FLAGS([-Wunused-result])
 172       AX_APPEND_COMPILE_FLAGS([-Wunused-variable])
 173       AX_APPEND_COMPILE_FLAGS([-Wwrite-strings])
 174       AX_APPEND_COMPILE_FLAGS([-Wformat-security])
 175       AX_APPEND_COMPILE_FLAGS([-floop-parallelize-all])
 176       AX_APPEND_COMPILE_FLAGS([-fwrapv])
 177       AX_APPEND_COMPILE_FLAGS([-ggdb])
 178       AC_LANG_POP
 179   ])