1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
#===============================================================================
# Copyright 2017-2019 Intel Corporation
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#===============================================================================
# Manage secure Development Lifecycle-related compiler flags
#===============================================================================
if(SDL_cmake_included)
return()
endif()
set(SDL_cmake_included true)
if(UNIX)
set(SDL_CXX_FLAGS "-O2 -Wformat -Wformat-security")
set(SDL_CXX_FLAGS "${SDL_CXX_FLAGS} -D_FORTIFY_SOURCE=2")
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -D_FORTIFY_SOURCE=2")
if("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
if(CMAKE_CXX_COMPILER_VERSION VERSION_LESS 4.9)
set(SDL_CXX_FLAGS "${SDL_CXX_FLAGS} -fstack-protector-all")
else()
set(SDL_CXX_FLAGS "${SDL_CXX_FLAGS} -fstack-protector-strong")
endif()
# GCC might be very paranoid for partial structure initialization, e.g.
# struct { int a, b; } s = { 0, };
# However the behavior is triggered by `Wmissing-field-initializers`
# only. To prevent warnings on users' side who use the library and turn
# this warning on, let's use it too. Applicable for the library sources
# and interfaces only (tests currently rely on that fact heavily)
# set(CMAKE_SRC_CCXX_FLAGS "${CMAKE_SRC_CCXX_FLAGS} -Wmissing-field-initializers")
# set(CMAKE_EXAMPLE_CCXX_FLAGS "${CMAKE_EXAMPLE_CCXX_FLAGS} -Wmissing-field-initializers")
elseif("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")
set(SDL_CXX_FLAGS "${SDL_CXX_FLAGS} -fstack-protector-all")
elseif("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Intel")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fstack-protector")
endif()
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${SDL_CXX_FLAGS}")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${SDL_CXX_FLAGS}")
if(APPLE)
set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -Wl,-bind_at_load")
set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -Wl,-bind_at_load")
else()
set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -pie")
set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -Wl,-z,noexecstack -Wl,-z,relro -Wl,-z,now")
set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -Wl,-z,noexecstack -Wl,-z,relro -Wl,-z,now")
endif()
endif()