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_ERROR([-std=c++11]) -- Not ready yet
  54 # AX_APPEND_COMPILE_FLAGS_ERROR([-pedantic]) -- ?
  55 # AX_APPEND_COMPILE_FLAGS_ERROR([-Wstack-protector]) -- Issues on 32bit compile
  56 # AX_APPEND_COMPILE_FLAGS_ERROR([-fstack-protector-all]) -- Issues on 32bit compile
  57 # AX_APPEND_COMPILE_FLAGS_ERROR([-Wlong-long]) -- Don't turn on for compatibility issues memcached_stat_st
  58
  59 #serial 5
  60
  61 AC_DEFUN([AX_APPEND_LINK_FLAGS_ERROR],
  62     [AC_PREREQ([2.63])dnl
  63     AX_APPEND_LINK_FLAGS([$1],[LIB],[-Werror])
  64     ])
  65
  66 AC_DEFUN([AX_APPEND_COMPILE_FLAGS_ERROR],
  67     [AC_PREREQ([2.63])dnl
  68     AX_APPEND_COMPILE_FLAGS([$1],,[-Werror])
  69     ])
  70
  71 AC_DEFUN([AX_HARDEN_LINKER_FLAGS],
  72     [AC_PREREQ([2.63])dnl
  73     AC_REQUIRE([AX_APPEND_LINK_FLAGS])
  74     AC_REQUIRE([AX_CXX_COMPILER_VERSION])
  75     AC_REQUIRE([AX_DEBUG])
  76     AC_REQUIRE([AX_VCS_CHECKOUT])
  77
  78     AX_APPEND_LINK_FLAGS_ERROR([-z relro -z now])
  79     AX_APPEND_LINK_FLAGS_ERROR([-pie])
  80
  81     AS_IF([test "x$ac_cv_vcs_checkout" = xyes],[AX_APPEND_LINK_FLAGS_ERROR([-Werror])])
  82     ])
  83
  84 AC_DEFUN([AX_HARDEN_CC_COMPILER_FLAGS],
  85     [AC_PREREQ([2.63])dnl
  86     AC_REQUIRE([AX_APPEND_LINK_FLAGS])
  87     AC_REQUIRE([AX_CXX_COMPILER_VERSION])
  88     AC_REQUIRE([AX_DEBUG])
  89     AC_REQUIRE([AX_VCS_CHECKOUT])
  90
  91     AC_LANG_PUSH([C])dnl
  92
  93     AX_APPEND_COMPILE_FLAGS_ERROR([-g])
  94     AS_IF([test "x$ax_enable_debug" = xyes],
  95       [AX_APPEND_COMPILE_FLAGS_ERROR([-ggdb])
  96       AX_APPEND_COMPILE_FLAGS_ERROR([-O0])],
  97       [AX_APPEND_COMPILE_FLAGS_ERROR([-O2])])
  98
  99     AX_APPEND_COMPILE_FLAGS_ERROR([-fstack-check])
 100     AX_APPEND_COMPILE_FLAGS_ERROR([-Wno-pragmas])
 101     AX_APPEND_COMPILE_FLAGS_ERROR([-Wall])
 102     AX_APPEND_COMPILE_FLAGS_ERROR([-Wextra])
 103     AX_APPEND_COMPILE_FLAGS_ERROR([-Wunknown-pragmas])
 104     AX_APPEND_COMPILE_FLAGS_ERROR([-Wthis-test-should-fail])
 105     AX_APPEND_COMPILE_FLAGS_ERROR([-std=c99])
 106 # Anything below this comment please keep sorted.
 107     AX_APPEND_COMPILE_FLAGS_ERROR([--param=ssp-buffer-size=1])
 108 # -Wmissing-format-attribute
 109     AX_APPEND_COMPILE_FLAGS_ERROR([-Wno-attributes])
 110     AX_APPEND_COMPILE_FLAGS_ERROR([-Waddress])
 111     AX_APPEND_COMPILE_FLAGS_ERROR([-Warray-bounds])
 112     AX_APPEND_COMPILE_FLAGS_ERROR([-Wbad-function-cast])
 113 # Not in use -Wc++-compat
 114     AX_APPEND_COMPILE_FLAGS_ERROR([-Wchar-subscripts])
 115     AX_APPEND_COMPILE_FLAGS_ERROR([-Wcomment])
 116     AX_APPEND_COMPILE_FLAGS_ERROR([-Wfloat-equal])
 117     AX_APPEND_COMPILE_FLAGS_ERROR([-Wformat-security])
 118     AX_APPEND_COMPILE_FLAGS_ERROR([-Wformat=2])
 119     AX_APPEND_COMPILE_FLAGS_ERROR([-Wlogical-op])
 120     AX_APPEND_COMPILE_FLAGS_ERROR([-Wmaybe-uninitialized])
 121     AX_APPEND_COMPILE_FLAGS_ERROR([-Wmissing-field-initializers])
 122     AS_IF([test "$MINGW" = "yes"],
 123         [AX_APPEND_COMPILE_FLAGS_ERROR([-Wno-missing-noreturn])],
 124         [AX_APPEND_COMPILE_FLAGS_ERROR([-Wmissing-noreturn])])
 125     AX_APPEND_COMPILE_FLAGS_ERROR([-Wmissing-prototypes])
 126     AX_APPEND_COMPILE_FLAGS_ERROR([-Wnested-externs])
 127     AX_APPEND_COMPILE_FLAGS_ERROR([-Wnormalized=id])
 128     AX_APPEND_COMPILE_FLAGS_ERROR([-Wold-style-definition])
 129     AX_APPEND_COMPILE_FLAGS_ERROR([-Woverride-init])
 130     AX_APPEND_COMPILE_FLAGS_ERROR([-Wpointer-arith])
 131     AX_APPEND_COMPILE_FLAGS_ERROR([-Wpointer-sign])
 132     AS_IF([test "x$MINGW" = xyes],
 133         [AX_APPEND_COMPILE_FLAGS_ERROR([-Wno-suggest-attribute=const])
 134         AX_APPEND_COMPILE_FLAGS_ERROR([-Wno-suggest-attribute=noreturn])
 135         AX_APPEND_COMPILE_FLAGS_ERROR([-Wno-suggest-attribute=pure])
 136         AX_APPEND_COMPILE_FLAGS_ERROR([-Wno-redundant-decls])],
 137         [AX_APPEND_COMPILE_FLAGS_ERROR([-Wredundant-decls])])
 138
 139     AX_APPEND_COMPILE_FLAGS_ERROR([-Wshadow])
 140     AX_APPEND_COMPILE_FLAGS_ERROR([-Wshorten-64-to-32])
 141     AX_APPEND_COMPILE_FLAGS_ERROR([-Wsign-compare])
 142     AX_APPEND_COMPILE_FLAGS_ERROR([-Wstrict-overflow=1])
 143     AX_APPEND_COMPILE_FLAGS_ERROR([-Wstrict-prototypes])
 144     AX_APPEND_COMPILE_FLAGS_ERROR([-Wswitch-enum])
 145     AX_APPEND_COMPILE_FLAGS_ERROR([-Wundef])
 146     AX_APPEND_COMPILE_FLAGS_ERROR([-Wunused])
 147     AX_APPEND_COMPILE_FLAGS_ERROR([-Wunused-result])
 148     AX_APPEND_COMPILE_FLAGS_ERROR([-Wunused-variable])
 149     AX_APPEND_COMPILE_FLAGS_ERROR([-Wwrite-strings])
 150     AX_APPEND_COMPILE_FLAGS_ERROR([-floop-parallelize-all])
 151     AX_APPEND_COMPILE_FLAGS_ERROR([-fwrapv])
 152     AX_APPEND_COMPILE_FLAGS_ERROR([-fmudflapt])
 153     AS_IF([test "x$ac_cv_vcs_checkout" = xyes], [AX_APPEND_COMPILE_FLAGS_ERROR([-Werror])])
 154     AC_LANG_POP([C])
 155   ])
 156
 157 AC_DEFUN([AX_HARDEN_CXX_COMPILER_FLAGS],
 158     [AC_PREREQ([2.63])dnl
 159     AC_REQUIRE([AX_APPEND_LINK_FLAGS])
 160     AC_REQUIRE([AX_CXX_COMPILER_VERSION])
 161     AC_REQUIRE([AX_DEBUG])
 162     AC_REQUIRE([AX_VCS_CHECKOUT])
 163
 164     AC_LANG_PUSH([C++])
 165
 166     AX_APPEND_COMPILE_FLAGS_ERROR([-g])
 167     AS_IF([test "x$ax_enable_debug" = xyes],
 168       [AX_APPEND_COMPILE_FLAGS_ERROR([-O0])
 169       AX_APPEND_COMPILE_FLAGS_ERROR([-ggdb])],
 170       [AX_APPEND_COMPILE_FLAGS_ERROR([-O2])])
 171
 172     AS_IF([test "x$ac_c_gcc_recent" = xyes],
 173       [AX_APPEND_COMPILE_FLAGS_ERROR([-D_FORTIFY_SOURCE=2])])
 174
 175     AS_IF([test "x$ac_cv_vcs_checkout" = xyes],
 176       [AX_APPEND_COMPILE_FLAGS_ERROR([-Werror])
 177       AX_APPEND_COMPILE_FLAGS_ERROR([-fstack-check])],
 178       [AX_APPEND_COMPILE_FLAGS_ERROR([-Wno-pragmas])])
 179
 180     AX_APPEND_COMPILE_FLAGS_ERROR([-Wall])
 181     AX_APPEND_COMPILE_FLAGS_ERROR([-Wextra])
 182     AX_APPEND_COMPILE_FLAGS_ERROR([-Wunknown-pragmas])
 183     AX_APPEND_COMPILE_FLAGS_ERROR([-Wthis-test-should-fail])
 184 # Anything below this comment please keep sorted.
 185     AX_APPEND_COMPILE_FLAGS_ERROR([--param=ssp-buffer-size=1])
 186 # -Wmissing-format-attribute
 187     AX_APPEND_COMPILE_FLAGS_ERROR([-Wno-attributes])
 188     AX_APPEND_COMPILE_FLAGS_ERROR([-Waddress])
 189     AX_APPEND_COMPILE_FLAGS_ERROR([-Warray-bounds])
 190     AX_APPEND_COMPILE_FLAGS_ERROR([-Wchar-subscripts])
 191     AX_APPEND_COMPILE_FLAGS_ERROR([-Wcomment])
 192     AX_APPEND_COMPILE_FLAGS_ERROR([-Wctor-dtor-privacy])
 193     AX_APPEND_COMPILE_FLAGS_ERROR([-Wfloat-equal])
 194     AX_APPEND_COMPILE_FLAGS_ERROR([-Wformat=2])
 195     AX_APPEND_COMPILE_FLAGS_ERROR([-Wmaybe-uninitialized])
 196     AX_APPEND_COMPILE_FLAGS_ERROR([-Wmissing-field-initializers])
 197     AS_IF([test "x$MINGW" = xyes],
 198         [AX_APPEND_COMPILE_FLAGS_ERROR([-Wno-missing-noreturn])],
 199         [AX_APPEND_COMPILE_FLAGS_ERROR([-Wmissing-noreturn])])
 200     AX_APPEND_COMPILE_FLAGS_ERROR([-Wlogical-op])
 201     AX_APPEND_COMPILE_FLAGS_ERROR([-Wnon-virtual-dtor])
 202     AX_APPEND_COMPILE_FLAGS_ERROR([-Wnormalized=id])
 203     AX_APPEND_COMPILE_FLAGS_ERROR([-Woverloaded-virtual])
 204     AX_APPEND_COMPILE_FLAGS_ERROR([-Wpointer-arith])
 205     AS_IF([test "x$MINGW" = xyes],
 206         [AX_APPEND_COMPILE_FLAGS_ERROR([-Wno-suggest-attribute=const])
 207         AX_APPEND_COMPILE_FLAGS_ERROR([-Wno-suggest-attribute=noreturn])
 208         AX_APPEND_COMPILE_FLAGS_ERROR([-Wno-error=suggest-attribute=noreturn])
 209         AX_APPEND_COMPILE_FLAGS_ERROR([-Wno-redundant-decls])],
 210         [AX_APPEND_COMPILE_FLAGS_ERROR([-Wredundant-decls])])
 211     AX_APPEND_COMPILE_FLAGS_ERROR([-Wshadow])
 212     AX_APPEND_COMPILE_FLAGS_ERROR([-Wshorten-64-to-32])
 213     AX_APPEND_COMPILE_FLAGS_ERROR([-Wsign-compare])
 214     AX_APPEND_COMPILE_FLAGS_ERROR([-Wstrict-overflow=1])
 215     AX_APPEND_COMPILE_FLAGS_ERROR([-Wswitch-enum])
 216     AX_APPEND_COMPILE_FLAGS_ERROR([-Wundef])
 217     AX_APPEND_COMPILE_FLAGS_ERROR([-Wc++11-compat])
 218     AX_APPEND_COMPILE_FLAGS_ERROR([-Wunused])
 219     AX_APPEND_COMPILE_FLAGS_ERROR([-Wunused-result])
 220     AX_APPEND_COMPILE_FLAGS_ERROR([-Wunused-variable])
 221     AX_APPEND_COMPILE_FLAGS_ERROR([-Wwrite-strings])
 222     AX_APPEND_COMPILE_FLAGS_ERROR([-Wformat-security])
 223     AX_APPEND_COMPILE_FLAGS_ERROR([-floop-parallelize-all])
 224     AX_APPEND_COMPILE_FLAGS_ERROR([-fwrapv])
 225     AX_APPEND_COMPILE_FLAGS_ERROR([-fmudflapt])
 226     AS_IF([test "x$ac_cv_vcs_checkout" = xyes], [AX_APPEND_COMPILE_FLAGS_ERROR([-Werror])])
 227     AC_LANG_POP([C++])
 228   ])
 229
 230   AC_DEFUN([AX_HARDEN_COMPILER_FLAGS],
 231       [AC_PREREQ([2.63])dnl
 232       AC_REQUIRE([AX_APPEND_COMPILE_FLAGS])
 233       AC_REQUIRE([AX_APPEND_LINK_FLAGS])
 234       AC_REQUIRE([AX_CXX_COMPILER_VERSION])
 235       AC_REQUIRE([AX_DEBUG])
 236       AC_REQUIRE([AX_VCS_CHECKOUT])
 237
 238       AC_CACHE_CHECK([if all warnings into errors],[ac_cv_warnings_as_errors],
 239         [AS_IF([test "x$ac_cv_vcs_checkout" = xyes],[ac_cv_warnings_as_errors=yes],
 240           [ac_cv_warnings_as_errors=no])
 241         ])
 242
 243 # All of the actual checks happen via these Macros
 244       AC_REQUIRE([AX_HARDEN_LINKER_FLAGS])
 245       AC_REQUIRE([AX_HARDEN_CC_COMPILER_FLAGS])
 246       AC_REQUIRE([AX_HARDEN_CXX_COMPILER_FLAGS])
 247       AC_REQUIRE([AX_CC_OTHER_FLAGS])
 248
 249       AC_REQUIRE([gl_VISIBILITY])
 250       AS_IF([test -n "$CFLAG_VISIBILITY"],[CPPFLAGS="$CPPFLAGS $CFLAG_VISIBILITY"])
 251       ])
 252
 253   AC_DEFUN([AX_CC_OTHER_FLAGS],
 254       [AC_PREREQ([2.63])dnl
 255       AC_REQUIRE([AX_APPEND_COMPILE_FLAGS_ERROR])
 256       AC_REQUIRE([AX_HARDEN_CC_COMPILER_FLAGS])
 257
 258       AC_LANG_PUSH([C])
 259       AX_APPEND_COMPILE_FLAGS_ERROR([-pipe])
 260       AC_LANG_POP([C])
 261       ])