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cmake: Build with -fstack-protector-strong if available #2597

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If not available, fall back to -fstack-protector + --param=ssp-buffer-size=4
If that isn't available, do nothing.

See the following articles for more information:

https://lwn.net/Articles/584225/
https://outflux.net/blog/archives/2014/01/27/fstack-protector-strong/
This commit is contained in:
Michael Reed 2015-08-26 18:00:33 -04:00
parent b2ece148e6
commit 2b4cbbebf4
1 changed files with 12 additions and 3 deletions
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11
CMakeLists.txt
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@ -117,6 +117,16 @@ if (MINGW)
add_definitions(-D__USE_MINGW_ANSI_STDIO)
endif()
include(CheckCCompilerFlag)
check_c_compiler_flag(-fstack-protector-strong HAS_FSTACK_PROTECTOR_STRONG_FLAG)
check_c_compiler_flag(-fstack-protector HAS_FSTACK_PROTECTOR_FLAG)
if(HAS_FSTACK_PROTECTOR_STRONG_FLAG)
add_definitions(-fstack-protector-strong)
elseif(HAS_FSTACK_PROTECTOR_FLAG)
add_definitions(-fstack-protector --param ssp-buffer-size=4)
endif()
option(
TRAVIS_CI_BUILD "Travis CI build. Extra compilation flags will be set." OFF)
@ -126,7 +136,6 @@ if(TRAVIS_CI_BUILD)
endif()
if(CMAKE_COMPILER_IS_GNUCC)
include(CheckCCompilerFlag)
check_c_compiler_flag(-Og HAS_OG_FLAG)
else()
set(HAS_OG_FLAG 0)