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() AX_HARDEN_LINKER_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 # _APPEND_COMPILE_FLAGS_ERROR([-std=c++11]) -- Not ready yet
  51 # _APPEND_COMPILE_FLAGS_ERROR([-pedantic]) --
  52 # ?  _APPEND_COMPILE_FLAGS_ERROR([-Wlong-long]) -- Don't turn on for
  53 # compatibility issues memcached_stat_st
  54
  55 #serial 6
  56
  57 AC_DEFUN([_APPEND_LINK_FLAGS_ERROR],
  58          [AC_REQUIRE([AX_APPEND_LINK_FLAGS])
  59          AX_APPEND_LINK_FLAGS([$1],[LIB],[-Werror])
  60          ])
  61
  62 AC_DEFUN([_APPEND_COMPILE_FLAGS_ERROR],
  63          [AC_REQUIRE([AX_APPEND_COMPILE_FLAGS])
  64          AX_APPEND_COMPILE_FLAGS([$1],,[-Werror])
  65          ])
  66
  67 AC_DEFUN([_HARDEN_LINKER_FLAGS],
  68          [_APPEND_LINK_FLAGS_ERROR([-z relro -z now])
  69          _APPEND_LINK_FLAGS_ERROR([-pie])
  70          AS_IF([test "x$ac_cv_warnings_as_errors" = xyes],
  71                [_APPEND_LINK_FLAGS_ERROR([-Werror])])
  72          ])
  73
  74 AC_DEFUN([_HARDEN_CC_COMPILER_FLAGS],
  75          [AC_LANG_PUSH([C])dnl
  76
  77          _APPEND_COMPILE_FLAGS_ERROR([-g])
  78          AS_IF([test "x$ax_enable_debug" = xyes],
  79                [_APPEND_COMPILE_FLAGS_ERROR([-ggdb])
  80                _APPEND_COMPILE_FLAGS_ERROR([-O0])],
  81                [_APPEND_COMPILE_FLAGS_ERROR([-O2])])
  82
  83          _APPEND_COMPILE_FLAGS_ERROR([-Wno-pragmas])
  84          _APPEND_COMPILE_FLAGS_ERROR([-Wall])
  85          _APPEND_COMPILE_FLAGS_ERROR([-Wextra])
  86          _APPEND_COMPILE_FLAGS_ERROR([-Wunknown-pragmas])
  87          _APPEND_COMPILE_FLAGS_ERROR([-Wthis-test-should-fail])
  88          _APPEND_COMPILE_FLAGS_ERROR([-std=c99])
  89 # Anything below this comment please keep sorted.
  90          _APPEND_COMPILE_FLAGS_ERROR([--param=ssp-buffer-size=1])
  91 # _APPEND_COMPILE_FLAGS_ERROR([-Wmissing-format-attribute])
  92           _APPEND_COMPILE_FLAGS_ERROR([-Wno-attributes])
  93           _APPEND_COMPILE_FLAGS_ERROR([-Waddress])
  94           _APPEND_COMPILE_FLAGS_ERROR([-Warray-bounds])
  95           _APPEND_COMPILE_FLAGS_ERROR([-Wbad-function-cast])
  96 # Not in use -Wc++-compat
  97           _APPEND_COMPILE_FLAGS_ERROR([-Wchar-subscripts])
  98           _APPEND_COMPILE_FLAGS_ERROR([-Wcomment])
  99           _APPEND_COMPILE_FLAGS_ERROR([-Wfloat-equal])
 100           _APPEND_COMPILE_FLAGS_ERROR([-Wformat-security])
 101           _APPEND_COMPILE_FLAGS_ERROR([-Wformat=2])
 102           _APPEND_COMPILE_FLAGS_ERROR([-Wlogical-op])
 103           _APPEND_COMPILE_FLAGS_ERROR([-Wmaybe-uninitialized])
 104           _APPEND_COMPILE_FLAGS_ERROR([-Wmissing-field-initializers])
 105           AS_IF([test "x$MINGW" = xyes],
 106                 [_APPEND_COMPILE_FLAGS_ERROR([-Wno-missing-noreturn])],
 107                 [_APPEND_COMPILE_FLAGS_ERROR([-Wmissing-noreturn])])
 108           _APPEND_COMPILE_FLAGS_ERROR([-Wmissing-prototypes])
 109           _APPEND_COMPILE_FLAGS_ERROR([-Wnested-externs])
 110           _APPEND_COMPILE_FLAGS_ERROR([-Wnormalized=id])
 111           _APPEND_COMPILE_FLAGS_ERROR([-Wold-style-definition])
 112           _APPEND_COMPILE_FLAGS_ERROR([-Woverride-init])
 113           _APPEND_COMPILE_FLAGS_ERROR([-Wpointer-arith])
 114           _APPEND_COMPILE_FLAGS_ERROR([-Wpointer-sign])
 115           AS_IF([test "x$MINGW" = xyes],
 116                 [_APPEND_COMPILE_FLAGS_ERROR([-Wno-suggest-attribute=const])
 117                 _APPEND_COMPILE_FLAGS_ERROR([-Wno-suggest-attribute=noreturn])
 118                 _APPEND_COMPILE_FLAGS_ERROR([-Wno-suggest-attribute=pure])
 119                 _APPEND_COMPILE_FLAGS_ERROR([-Wno-redundant-decls])],
 120                 [_APPEND_COMPILE_FLAGS_ERROR([-Wredundant-decls])])
 121
 122           _APPEND_COMPILE_FLAGS_ERROR([-Wshadow])
 123           _APPEND_COMPILE_FLAGS_ERROR([-Wshorten-64-to-32])
 124           _APPEND_COMPILE_FLAGS_ERROR([-Wsign-compare])
 125           _APPEND_COMPILE_FLAGS_ERROR([-Wstrict-overflow=1])
 126           _APPEND_COMPILE_FLAGS_ERROR([-Wstrict-prototypes])
 127           _APPEND_COMPILE_FLAGS_ERROR([-Wswitch-enum])
 128           _APPEND_COMPILE_FLAGS_ERROR([-Wundef])
 129           _APPEND_COMPILE_FLAGS_ERROR([-Wunused])
 130           _APPEND_COMPILE_FLAGS_ERROR([-Wunused-result])
 131           _APPEND_COMPILE_FLAGS_ERROR([-Wunused-variable])
 132           _APPEND_COMPILE_FLAGS_ERROR([-Wwrite-strings])
 133           _APPEND_COMPILE_FLAGS_ERROR([-floop-parallelize-all])
 134           _APPEND_COMPILE_FLAGS_ERROR([-fwrapv])
 135           _APPEND_COMPILE_FLAGS_ERROR([-fmudflapt])
 136
 137           AS_IF([test "x$ax_enable_debug" = xno],
 138             [AS_IF([test "x$ac_cv_vcs_checkout" = xyes],
 139                   [_APPEND_COMPILE_FLAGS_ERROR([-fstack-check])
 140                   AS_IF([test "x$ac_c_gcc_recent" = xyes],
 141                         [_APPEND_COMPILE_FLAGS_ERROR([-D_FORTIFY_SOURCE=2])
 142                         _APPEND_COMPILE_FLAGS_ERROR([-Wstack-protector])
 143                         _APPEND_COMPILE_FLAGS_ERROR([-fstack-protector])
 144                         _APPEND_COMPILE_FLAGS_ERROR([-fstack-protector-all])
 145                         ])])])
 146
 147          AS_IF([test "x$ac_cv_vcs_checkout" = xyes],
 148                [_APPEND_COMPILE_FLAGS_ERROR([-fstack-check])],
 149                [_APPEND_COMPILE_FLAGS_ERROR([-Wno-pragmas])])
 150
 151           AC_LANG_POP([C])
 152   ])
 153
 154 AC_DEFUN([_HARDEN_CXX_COMPILER_FLAGS],
 155          [AC_LANG_PUSH([C++])
 156          AC_REQUIRE([_APPEND_COMPILE_FLAGS_ERROR])
 157
 158             _APPEND_COMPILE_FLAGS_ERROR([-g])
 159             AS_IF([test "x$ax_enable_debug" = xyes],
 160                   [_APPEND_COMPILE_FLAGS_ERROR([-O0])
 161                   _APPEND_COMPILE_FLAGS_ERROR([-ggdb])],
 162                   [_APPEND_COMPILE_FLAGS_ERROR([-O2])])
 163
 164             AS_IF([test "x$ac_cv_vcs_checkout" = xyes],
 165                   [_APPEND_COMPILE_FLAGS_ERROR([-fstack-check])],
 166                   [_APPEND_COMPILE_FLAGS_ERROR([-Wno-pragmas])])
 167
 168             _APPEND_COMPILE_FLAGS_ERROR([-Wall])
 169             _APPEND_COMPILE_FLAGS_ERROR([-Wextra])
 170             _APPEND_COMPILE_FLAGS_ERROR([-Wunknown-pragmas])
 171             _APPEND_COMPILE_FLAGS_ERROR([-Wthis-test-should-fail])
 172 # Anything below this comment please keep sorted.
 173             _APPEND_COMPILE_FLAGS_ERROR([--param=ssp-buffer-size=1])
 174 # _APPEND_COMPILE_FLAGS_ERROR([-Wmissing-format-attribute])
 175             _APPEND_COMPILE_FLAGS_ERROR([-Wno-attributes])
 176             _APPEND_COMPILE_FLAGS_ERROR([-Waddress])
 177             _APPEND_COMPILE_FLAGS_ERROR([-Warray-bounds])
 178             _APPEND_COMPILE_FLAGS_ERROR([-Wchar-subscripts])
 179             _APPEND_COMPILE_FLAGS_ERROR([-Wcomment])
 180             _APPEND_COMPILE_FLAGS_ERROR([-Wctor-dtor-privacy])
 181             _APPEND_COMPILE_FLAGS_ERROR([-Wfloat-equal])
 182             _APPEND_COMPILE_FLAGS_ERROR([-Wformat=2])
 183             _APPEND_COMPILE_FLAGS_ERROR([-Wmaybe-uninitialized])
 184             _APPEND_COMPILE_FLAGS_ERROR([-Wmissing-field-initializers])
 185             _APPEND_COMPILE_FLAGS_ERROR([-Wlogical-op])
 186             _APPEND_COMPILE_FLAGS_ERROR([-Wnon-virtual-dtor])
 187             _APPEND_COMPILE_FLAGS_ERROR([-Wnormalized=id])
 188             _APPEND_COMPILE_FLAGS_ERROR([-Woverloaded-virtual])
 189             _APPEND_COMPILE_FLAGS_ERROR([-Wpointer-arith])
 190             AS_IF([test "x$MINGW" = xyes],
 191                   [_APPEND_COMPILE_FLAGS_ERROR([-Wno-suggest-attribute=const])
 192                   _APPEND_COMPILE_FLAGS_ERROR([-Wno-missing-noreturn])
 193                   _APPEND_COMPILE_FLAGS_ERROR([-Wmissing-noreturn])
 194                   _APPEND_COMPILE_FLAGS_ERROR([-Wno-suggest-attribute=noreturn])
 195                   _APPEND_COMPILE_FLAGS_ERROR([-Wno-error=suggest-attribute=noreturn])
 196                   _APPEND_COMPILE_FLAGS_ERROR([-Wno-redundant-decls])],
 197                   [_APPEND_COMPILE_FLAGS_ERROR([-Wredundant-decls])])
 198             _APPEND_COMPILE_FLAGS_ERROR([-Wshadow])
 199             _APPEND_COMPILE_FLAGS_ERROR([-Wshorten-64-to-32])
 200             _APPEND_COMPILE_FLAGS_ERROR([-Wsign-compare])
 201             _APPEND_COMPILE_FLAGS_ERROR([-Wstrict-overflow=1])
 202             _APPEND_COMPILE_FLAGS_ERROR([-Wswitch-enum])
 203             _APPEND_COMPILE_FLAGS_ERROR([-Wundef])
 204             _APPEND_COMPILE_FLAGS_ERROR([-Wc++11-compat])
 205             _APPEND_COMPILE_FLAGS_ERROR([-Wunused])
 206             _APPEND_COMPILE_FLAGS_ERROR([-Wunused-result])
 207             _APPEND_COMPILE_FLAGS_ERROR([-Wunused-variable])
 208             _APPEND_COMPILE_FLAGS_ERROR([-Wwrite-strings])
 209             _APPEND_COMPILE_FLAGS_ERROR([-Wformat-security])
 210             _APPEND_COMPILE_FLAGS_ERROR([-floop-parallelize-all])
 211             _APPEND_COMPILE_FLAGS_ERROR([-fwrapv])
 212             _APPEND_COMPILE_FLAGS_ERROR([-fmudflapt])
 213
 214             AS_IF([test "x$ax_enable_debug" = xno],
 215             [AS_IF([test "x$ac_cv_vcs_checkout" = xyes],
 216                   [_APPEND_COMPILE_FLAGS_ERROR([-fstack-check])
 217                   AS_IF([test "x$ac_c_gcc_recent" = xyes],
 218                         [_APPEND_COMPILE_FLAGS_ERROR([-D_FORTIFY_SOURCE=2])
 219                         _APPEND_COMPILE_FLAGS_ERROR([-Wstack-protector])
 220                         _APPEND_COMPILE_FLAGS_ERROR([-fstack-protector])
 221                         _APPEND_COMPILE_FLAGS_ERROR([-fstack-protector-all])
 222                         ])])])
 223
 224             AS_IF([test "x$ac_cv_warnings_as_errors" = xyes],
 225                   [_APPEND_COMPILE_FLAGS_ERROR([-Werror])])
 226             AC_LANG_POP([C++])
 227   ])
 228
 229   AC_DEFUN([_CC_OTHER_FLAGS],
 230             [AC_REQUIRE([_APPEND_COMPILE_FLAGS_ERROR])
 231
 232             AC_LANG_PUSH([C])
 233             _APPEND_COMPILE_FLAGS_ERROR([-pipe])
 234             AC_LANG_POP([C])
 235             ])
 236
 237 # All of the heavy lifting happens in _HARDEN_LINKER_FLAGS,
 238 # _HARDEN_CC_COMPILER_FLAGS, _HARDEN_CXX_COMPILER_FLAGS, _CC_OTHER_FLAGS
 239   AC_DEFUN([AX_HARDEN_COMPILER_FLAGS],
 240            [AC_PREREQ([2.63])dnl
 241            AC_REQUIRE([AX_APPEND_LINK_FLAGS])
 242            AC_REQUIRE([AX_COMPILER_VERSION])
 243            AC_REQUIRE([AX_DEBUG])
 244            AC_REQUIRE([AX_VCS_CHECKOUT])
 245
 246            AC_REQUIRE([gl_VISIBILITY])
 247            AS_IF([test -n "$CFLAG_VISIBILITY"],[CPPFLAGS="$CPPFLAGS $CFLAG_VISIBILITY"])
 248
 249            AC_CACHE_CHECK([if all warnings into errors],[ac_cv_warnings_as_errors],
 250                           [AS_IF([test "x$ac_cv_vcs_checkout" = xyes],[ac_cv_warnings_as_errors=yes],
 251                                  [ac_cv_warnings_as_errors=no])
 252                           ])
 253
 254            AC_REQUIRE([_HARDEN_LINKER_FLAGS])
 255            AC_REQUIRE([_HARDEN_CC_COMPILER_FLAGS])
 256            AC_REQUIRE([_HARDEN_CXX_COMPILER_FLAGS])
 257            AC_REQUIRE([_CC_OTHER_FLAGS])
 258            ])