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cmake/configure.ac: Enable -fstack-protector-strong by default

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This commit contains the following changes:

- Drops -fstack-protector in favor of -fstack-protector-strong.
  Consequently, the ssp-buffer-size parameter has been removed as
  -fstack-protector-strong ignores array size.

- Add new global opt-out for stack smash protection. This is enabled
  by default for both autotools and CMake builds. Users can opt out
  of stack smash protection by passing -DWITH_STACK_PROTECTOR=OFF to
  CMake or --disable-stack-smash-protection when running ./configure.

- Renames HAVE_SSP_FLAG to HAVE_STACK_PROTECTOR_FLAG in
  CMakeLists.txt to be more readable.
This commit is contained in:
NotTsunami
2019-11-19 16:28:22 -05:00
committed by Erik de Castro Lopo
parent 1640e10e43
commit f706f28322
3 changed files with 19 additions and 11 deletions
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7
configure.ac
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@@ -310,8 +310,10 @@ AC_SUBST(FLAC__TEST_LEVEL)
AC_ARG_ENABLE(werror,
AC_HELP_STRING([--enable-werror], [Enable -Werror in all Makefiles]))
AC_ARG_ENABLE(stack-smash-protection,
AC_HELP_STRING([--enable-stack-smash-protection], [Enable GNU GCC stack smash protection]))
AC_ARG_ENABLE([stack-smash-protection],
[AS_HELP_STRING([--disable-stack-smash-protection],[Disable GNU GCC stack smash protection])],,
[AS_IF([test "$ac_cv_c_compiler_gnu" = "yes" && test "$os_is_windows" = "no"],
[enable_stack_smash_protection=yes],[enable_stack_smash_protection=no])])
AC_ARG_ENABLE(64-bit-words,
AC_HELP_STRING([--enable-64-bit-words], [Set FLAC__BYTES_PER_WORD to 8 (4 is the default)]))
@@ -627,5 +629,6 @@ fi
echo " SSE optimizations : ....................... ${sse_os}"
echo " Asm optimizations : ....................... ${asm_optimisation}"
echo " Ogg/FLAC support : ........................ ${have_ogg}"
echo " Stack protector : ........................ ${enable_stack_smash_protection}"
echo " Fuzzing support (Clang only) : ............ ${have_oss_fuzzers}"
echo