[x265] [PATCH 5 of 6] cmake: use the more aggressive form -fstack-protector-all

[Steve Borho]

# HG changeset patch
# User Steve Borho <steve at borho.org>
# Date 1425661270 21600
#      Fri Mar 06 11:01:10 2015 -0600
# Node ID a07ea06f3ee8a5d1edb2edc584934d38f26583d8
# Parent  eea4096c1503850d057f8e4c64dfc1c2b5546574
cmake: use the more aggressive form -fstack-protector-all

The simpler -fstack-protector was only instrumenting a few functions in
search.cpp (we only noticed when there were link failures because of libssp)

diff -r eea4096c1503 -r a07ea06f3ee8 source/CMakeLists.txt
--- a/source/CMakeLists.txt	Fri Mar 06 10:51:00 2015 -0600
+++ b/source/CMakeLists.txt	Fri Mar 06 11:01:10 2015 -0600
@@ -187,7 +187,7 @@
     if(GCC)
         check_cxx_compiler_flag(-fsanitize=undefined-trap CC_HAS_CATCH_UNDEFINED) # clang
         check_cxx_compiler_flag(-ftrapv CC_HAS_FTRAPV)                            # gcc
-        check_cxx_compiler_flag(-fstack-protector CC_HAS_STACK_PROTECT)           # gcc
+        check_cxx_compiler_flag(-fstack-protector-all CC_HAS_STACK_PROTECT)       # gcc
         if(CC_HAS_FTRAPV)
             add_definitions(-ftrapv)
         endif()
@@ -195,7 +195,7 @@
             add_definitions(-fsanitize=undefined-trap -fsanitize-undefined-trap-on-error)
         endif()
         if(CC_HAS_STACK_PROTECT)
-            add_definitions(-fstack-protector)
+            add_definitions(-fstack-protector-all)
             if(MINGW)
                 list(APPEND PLATFORM_LIBS ssp)
             endif()