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 5
  60
  61 AC_DEFUN([AX_HARDEN_LINKER_FLAGS],
  62     [AC_PREREQ([2.63])dnl
  63     AC_REQUIRE([AX_CHECK_LINK_FLAG])
  64     AC_REQUIRE([AX_VCS_CHECKOUT])
  65     AC_REQUIRE([AX_DEBUG])
  66     AC_REQUIRE([AX_CXX_COMPILER_VERSION])
  67
  68     dnl If we are inside of VCS we append -Werror, otherwise we just use it to test other flags
  69     AX_HARDEN_LIB=
  70     ax_append_compile_link_flags_extra=
  71     AS_IF([test "x$ac_cv_vcs_checkout" = "xyes"],
  72       [AX_CHECK_LINK_FLAG([-Werror],
  73         [AX_HARDEN_LIB="-Werror $AX_HARDEN_LIB"])
  74       ],
  75       [AX_CHECK_LINK_FLAG([-Werror],[
  76         ax_append_compile_link_flags_extra='-Werror'
  77         ])
  78       ])
  79
  80     AX_CHECK_LINK_FLAG([-z relro -z now],
  81       [AX_HARDEN_LIB="-z relro -z now $AX_HARDEN_LIB"],,
  82       [$ax_append_compile_link_flags_extra])
  83
  84     AX_CHECK_LINK_FLAG([-pie],
  85         [AX_HARDEN_LIB="-pie $AX_HARDEN_LIB"],,
  86         [$ax_append_compile_link_flags_extra])
  87
  88     LIB="$LIB $AX_HARDEN_LIB"
  89     ])
  90
  91       AC_DEFUN([AX_HARDEN_CC_COMPILER_FLAGS],
  92           [AC_PREREQ([2.63])dnl
  93           AC_REQUIRE([AX_APPEND_COMPILE_FLAGS])
  94           AC_REQUIRE([AX_HARDEN_LINKER_FLAGS])
  95
  96           AC_LANG_PUSH([C])
  97
  98           ac_cv_warnings_as_errors=no
  99           ax_append_compile_cflags_extra=
 100           AS_IF([test "$ac_cv_vcs_checkout" = "yes"],[
 101             AX_APPEND_COMPILE_FLAGS([-Werror])
 102             ac_cv_warnings_as_errors=yes
 103             ],[
 104             AX_APPEND_COMPILE_FLAGS([-Werror],[ax_append_compile_cflags_extra])
 105             ])
 106
 107           AX_APPEND_COMPILE_FLAGS([-g])
 108           AS_IF([test "$ax_enable_debug" = "yes"], [
 109             AX_APPEND_COMPILE_FLAGS([-ggdb],,[$ax_append_compile_cflags_extra])
 110             AX_APPEND_COMPILE_FLAGS([-O0],,[$ax_append_compile_cflags_extra])
 111             ],[
 112             AX_APPEND_COMPILE_FLAGS([-O2],,[$ax_append_compile_cflags_extra])
 113             ])
 114
 115   AX_APPEND_COMPILE_FLAGS([-fstack-check],,[$ax_append_compile_cflags_extra])
 116 AX_APPEND_COMPILE_FLAGS([-Wno-pragmas],,[$ax_append_compile_cflags_extra])
 117
 118   AX_APPEND_COMPILE_FLAGS([-Wall],,[$ax_append_compile_cflags_extra])
 119   AX_APPEND_COMPILE_FLAGS([-Wextra],,[$ax_append_compile_cflags_extra])
 120   AX_APPEND_COMPILE_FLAGS([-Wunknown-pragmas],,[$ax_append_compile_cflags_extra])
 121   AX_APPEND_COMPILE_FLAGS([-Wthis-test-should-fail],,[$ax_append_compile_cflags_extra])
 122 AX_APPEND_COMPILE_FLAGS([-std=c99],,[$ax_append_compile_cflags_extra])
 123   dnl Anything below this comment please keep sorted.
 124 AX_APPEND_COMPILE_FLAGS([--param=ssp-buffer-size=1],,[$ax_append_compile_cflags_extra])
 125   dnl -Wmissing-format-attribute
 126   AX_APPEND_COMPILE_FLAGS([-Wno-attributes],,[$ax_append_compile_cflags_extra])
 127   AX_APPEND_COMPILE_FLAGS([-Waddress],,[$ax_append_compile_cflags_extra])
 128   AX_APPEND_COMPILE_FLAGS([-Warray-bounds],,[$ax_append_compile_cflags_extra])
 129 AX_APPEND_COMPILE_FLAGS([-Wbad-function-cast],,[$ax_append_compile_cflags_extra])
 130   dnl Not in use -Wc++-compat
 131   AX_APPEND_COMPILE_FLAGS([-Wchar-subscripts],,[$ax_append_compile_cflags_extra])
 132   AX_APPEND_COMPILE_FLAGS([-Wcomment],,[$ax_append_compile_cflags_extra])
 133   AX_APPEND_COMPILE_FLAGS([-Wfloat-equal],,[$ax_append_compile_cflags_extra])
 134   AX_APPEND_COMPILE_FLAGS([-Wformat-security],,[$ax_append_compile_cflags_extra])
 135   AX_APPEND_COMPILE_FLAGS([-Wformat=2],,[$ax_append_compile_cflags_extra])
 136   AX_APPEND_COMPILE_FLAGS([-Wlogical-op],,[$ax_append_compile_cflags_extra])
 137   AX_APPEND_COMPILE_FLAGS([-Wmaybe-uninitialized],,[$ax_append_compile_cflags_extra])
 138 AX_APPEND_COMPILE_FLAGS([-Wmissing-field-initializers],,[$ax_append_compile_cflags_extra])
 139   AS_IF([test "$MINGW" = "yes"],[
 140       AX_APPEND_COMPILE_FLAGS([-Wno-missing-noreturn],,[$ax_append_compile_cflags_extra])
 141       ],[
 142       AX_APPEND_COMPILE_FLAGS([-Wmissing-noreturn],,[$ax_append_compile_cflags_extra])
 143       ])
 144   AX_APPEND_COMPILE_FLAGS([-Wmissing-prototypes],,[$ax_append_compile_cflags_extra])
 145   AX_APPEND_COMPILE_FLAGS([-Wnested-externs],,[$ax_append_compile_cflags_extra])
 146   AX_APPEND_COMPILE_FLAGS([-Wnormalized=id],,[$ax_append_compile_cflags_extra])
 147   AX_APPEND_COMPILE_FLAGS([-Wold-style-definition],,[$ax_append_compile_cflags_extra])
 148   AX_APPEND_COMPILE_FLAGS([-Woverride-init],,[$ax_append_compile_cflags_extra])
 149   AX_APPEND_COMPILE_FLAGS([-Wpointer-arith],,[$ax_append_compile_cflags_extra])
 150 AX_APPEND_COMPILE_FLAGS([-Wpointer-sign],,[$ax_append_compile_cflags_extra])
 151   AS_IF([test "$MINGW" = "yes"],[
 152       AX_APPEND_COMPILE_FLAGS([-Wno-suggest-attribute=const],,[$ax_append_compile_cflags_extra])
 153       AX_APPEND_COMPILE_FLAGS([-Wno-suggest-attribute=noreturn],,[$ax_append_compile_cflags_extra])
 154       AX_APPEND_COMPILE_FLAGS([-Wno-suggest-attribute=pure],,[$ax_append_compile_cflags_extra])
 155       AX_APPEND_COMPILE_FLAGS([-Wno-redundant-decls],,[$ax_append_compile_cflags_extra])
 156       ],[
 157       AX_APPEND_COMPILE_FLAGS([-Wredundant-decls],,[$ax_append_compile_cflags_extra])
 158       ])
 159   AX_APPEND_COMPILE_FLAGS([-Wshadow],,[$ax_append_compile_cflags_extra])
 160   AX_APPEND_COMPILE_FLAGS([-Wshorten-64-to-32],,[$ax_append_compile_cflags_extra])
 161   AX_APPEND_COMPILE_FLAGS([-Wsign-compare],,[$ax_append_compile_cflags_extra])
 162   AX_APPEND_COMPILE_FLAGS([-Wstrict-overflow=1],,[$ax_append_compile_cflags_extra])
 163   AX_APPEND_COMPILE_FLAGS([-Wstrict-prototypes],,[$ax_append_compile_cflags_extra])
 164   AX_APPEND_COMPILE_FLAGS([-Wswitch-enum],,[$ax_append_compile_cflags_extra])
 165   AX_APPEND_COMPILE_FLAGS([-Wundef],,[$ax_append_compile_cflags_extra])
 166   AX_APPEND_COMPILE_FLAGS([-Wunused],,[$ax_append_compile_cflags_extra])
 167   AX_APPEND_COMPILE_FLAGS([-Wunused-result],,[$ax_append_compile_cflags_extra])
 168   AX_APPEND_COMPILE_FLAGS([-Wunused-variable],,[$ax_append_compile_cflags_extra])
 169   AX_APPEND_COMPILE_FLAGS([-Wwrite-strings],,[$ax_append_compile_cflags_extra])
 170   AX_APPEND_COMPILE_FLAGS([-floop-parallelize-all],,[$ax_append_compile_cflags_extra])
 171 AX_APPEND_COMPILE_FLAGS([-fwrapv],,[$ax_append_compile_cflags_extra])
 172   AC_LANG_POP
 173   ])
 174
 175   AC_DEFUN([AX_HARDEN_CXX_COMPILER_FLAGS],
 176       [AC_PREREQ([2.63])dnl
 177       AC_REQUIRE([AX_HARDEN_CC_COMPILER_FLAGS])
 178       AC_LANG_PUSH([C++])
 179
 180       ax_append_compile_cxxflags_extra=
 181       AS_IF([test "$ac_cv_warnings_as_errors" = "yes"],[
 182         AX_APPEND_COMPILE_FLAGS([-Werror])
 183         ],[
 184         AX_APPEND_COMPILE_FLAGS([-Werror],[ax_append_compile_cxxflags_extra])
 185         ])
 186
 187       AX_APPEND_COMPILE_FLAGS([-g],,[$ax_append_compile_cxxflags_extra])
 188       AS_IF([test "$ax_enable_debug" = "yes"], [
 189         AX_APPEND_COMPILE_FLAGS([-O0],,[$ax_append_compile_cxxflags_extra])
 190         AX_APPEND_COMPILE_FLAGS([-ggdb],,[$ax_append_compile_cxxflags_extra])
 191         ],[
 192         AX_APPEND_COMPILE_FLAGS([-O2],,[$ax_append_compile_cxxflags_extra])
 193         AX_APPEND_COMPILE_FLAGS([-D_FORTIFY_SOURCE=2],,[$ax_append_compile_cxxflags_extra])
 194         ])
 195
 196   AS_IF([test "$ac_cv_vcs_checkout" = "yes"], [
 197       AX_APPEND_COMPILE_FLAGS([-Werror],,[$ax_append_compile_cxxflags_extra])
 198       AX_APPEND_COMPILE_FLAGS([-fstack-check],,[$ax_append_compile_cxxflags_extra])
 199       ],[
 200       AX_APPEND_COMPILE_FLAGS([-Wno-pragmas],,[$ax_append_compile_cxxflags_extra])
 201       ])
 202
 203   AX_APPEND_COMPILE_FLAGS([-Wall],,[$ax_append_compile_cxxflags_extra])
 204   AX_APPEND_COMPILE_FLAGS([-Wextra],,[$ax_append_compile_cxxflags_extra])
 205   AX_APPEND_COMPILE_FLAGS([-Wunknown-pragmas],,[$ax_append_compile_cxxflags_extra])
 206 AX_APPEND_COMPILE_FLAGS([-Wthis-test-should-fail],,[$ax_append_compile_cxxflags_extra])
 207   dnl Anything below this comment please keep sorted.
 208 AX_APPEND_COMPILE_FLAGS([--param=ssp-buffer-size=1],,[$ax_append_compile_cxxflags_extra])
 209   dnl -Wmissing-format-attribute
 210   AX_APPEND_COMPILE_FLAGS([-Wno-attributes],,[$ax_append_compile_cxxflags_extra])
 211   AX_APPEND_COMPILE_FLAGS([-Waddress],,[$ax_append_compile_cxxflags_extra])
 212   AX_APPEND_COMPILE_FLAGS([-Warray-bounds],,[$ax_append_compile_cxxflags_extra])
 213   AX_APPEND_COMPILE_FLAGS([-Wchar-subscripts],,[$ax_append_compile_cxxflags_extra])
 214   AX_APPEND_COMPILE_FLAGS([-Wcomment],,[$ax_append_compile_cxxflags_extra])
 215   AX_APPEND_COMPILE_FLAGS([-Wctor-dtor-privacy],,[$ax_append_compile_cxxflags_extra])
 216   AX_APPEND_COMPILE_FLAGS([-Wfloat-equal],,[$ax_append_compile_cxxflags_extra])
 217   AX_APPEND_COMPILE_FLAGS([-Wformat=2],,[$ax_append_compile_cxxflags_extra])
 218   AX_APPEND_COMPILE_FLAGS([-Wmaybe-uninitialized],,[$ax_append_compile_cxxflags_extra])
 219 AX_APPEND_COMPILE_FLAGS([-Wmissing-field-initializers],,[$ax_append_compile_cxxflags_extra])
 220   AS_IF([test "$MINGW" = "yes"],[
 221       AX_APPEND_COMPILE_FLAGS([-Wno-missing-noreturn],,[$ax_append_compile_cxxflags_extra])
 222       ],[
 223       AX_APPEND_COMPILE_FLAGS([-Wmissing-noreturn],,[$ax_append_compile_cxxflags_extra])
 224       ])
 225   AX_APPEND_COMPILE_FLAGS([-Wlogical-op],,[$ax_append_compile_cxxflags_extra])
 226   AX_APPEND_COMPILE_FLAGS([-Wnon-virtual-dtor],,[$ax_append_compile_cxxflags_extra])
 227   AX_APPEND_COMPILE_FLAGS([-Wnormalized=id],,[$ax_append_compile_cxxflags_extra])
 228   AX_APPEND_COMPILE_FLAGS([-Woverloaded-virtual],,[$ax_append_compile_cxxflags_extra])
 229 AX_APPEND_COMPILE_FLAGS([-Wpointer-arith],,[$ax_append_compile_cxxflags_extra])
 230   AS_IF([test "$MINGW" = "yes"],[
 231       AX_APPEND_COMPILE_FLAGS([-Wno-suggest-attribute=const],,[$ax_append_compile_cxxflags_extra])
 232       AX_APPEND_COMPILE_FLAGS([-Wno-suggest-attribute=noreturn],,[$ax_append_compile_cxxflags_extra])
 233       AX_APPEND_COMPILE_FLAGS([-Wno-error=suggest-attribute=noreturn],,[$ax_append_compile_cxxflags_extra])
 234       AX_APPEND_COMPILE_FLAGS([-Wno-redundant-decls],,[$ax_append_compile_cxxflags_extra])
 235       ],[
 236       AX_APPEND_COMPILE_FLAGS([-Wredundant-decls],,[$ax_append_compile_cxxflags_extra])
 237       ])
 238   AX_APPEND_COMPILE_FLAGS([-Wshadow],,[$ax_append_compile_cxxflags_extra])
 239   AX_APPEND_COMPILE_FLAGS([-Wshorten-64-to-32],,[$ax_append_compile_cxxflags_extra])
 240   AX_APPEND_COMPILE_FLAGS([-Wsign-compare],,[$ax_append_compile_cxxflags_extra])
 241   AX_APPEND_COMPILE_FLAGS([-Wstrict-overflow=1],,[$ax_append_compile_cxxflags_extra])
 242   AX_APPEND_COMPILE_FLAGS([-Wswitch-enum],,[$ax_append_compile_cxxflags_extra])
 243   AX_APPEND_COMPILE_FLAGS([-Wundef],,[$ax_append_compile_cxxflags_extra])
 244   AX_APPEND_COMPILE_FLAGS([-Wc++11-compat],,[$ax_append_compile_cxxflags_extra])
 245   AX_APPEND_COMPILE_FLAGS([-Wunused],,[$ax_append_compile_cxxflags_extra])
 246   AX_APPEND_COMPILE_FLAGS([-Wunused-result],,[$ax_append_compile_cxxflags_extra])
 247   AX_APPEND_COMPILE_FLAGS([-Wunused-variable],,[$ax_append_compile_cxxflags_extra])
 248   AX_APPEND_COMPILE_FLAGS([-Wwrite-strings],,[$ax_append_compile_cxxflags_extra])
 249   AX_APPEND_COMPILE_FLAGS([-Wformat-security],,[$ax_append_compile_cxxflags_extra])
 250   AX_APPEND_COMPILE_FLAGS([-floop-parallelize-all],,[$ax_append_compile_cxxflags_extra])
 251 AX_APPEND_COMPILE_FLAGS([-fwrapv],,[$ax_append_compile_cxxflags_extra])
 252   AC_LANG_POP
 253   ])
 254
 255   AC_DEFUN([AX_HARDEN_COMPILER_FLAGS],
 256       [AC_PREREQ([2.63])dnl
 257       AC_REQUIRE([AX_HARDEN_CXX_COMPILER_FLAGS])
 258       AC_REQUIRE([AX_CC_OTHER_FLAGS])
 259       gl_VISIBILITY
 260       AS_IF([test -n "$CFLAG_VISIBILITY"], [ CPPFLAGS="$CPPFLAGS $CFLAG_VISIBILITY" ])
 261       ])
 262
 263   AC_DEFUN([AX_CC_OTHER_FLAGS],
 264       [AC_PREREQ([2.63])dnl
 265       AC_REQUIRE([AX_APPEND_COMPILE_FLAGS])
 266       AC_REQUIRE([AX_HARDEN_CC_COMPILER_FLAGS])
 267
 268       AC_LANG_PUSH([C])
 269       AX_APPEND_COMPILE_FLAGS([-pipe],,[$ax_append_compile_cflags_extra])
 270       AC_LANG_POP
 271       ])