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