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Documenting the compiler flags

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Hristo Stamenov 2021-01-26 11:06:57 +02:00
parent 65b299c6cf
commit 401b680218
1 changed files with 39 additions and 15 deletions
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54
cmake/CompilerFlags.cmake
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@ -1,28 +1,52 @@
include(AddIfFlagCompiles)
# Makes +/- operations on void pointers be considered an error
# https://gcc.gnu.org/onlinedocs/gcc/Pointer-Arith.html
add_if_flag_compiles(-Werror=pointer-arith CMAKE_C_FLAGS)
# Generates error whenever a function is used before being declared
# https://gcc.gnu.org/onlinedocs/gcc-4.0.1/gcc/Warning-Options.html
add_if_flag_compiles(-Werror=implicit-function-declaration CMAKE_C_FLAGS)
# src/external/jar_xm.h does shady stuff
# Allows some casting of pointers without generating a warning
add_if_flag_compiles(-fno-strict-aliasing CMAKE_C_FLAGS)
if (ENABLE_ASAN)
add_if_flag_compiles(-fno-omit-frame-pointer CMAKE_C_FLAGS CMAKE_LINKER_FLAGS)
add_if_flag_compiles(-fsanitize=address CMAKE_C_FLAGS CMAKE_LINKER_FLAGS)
endif()
if (ENABLE_UBSAN)
add_if_flag_compiles(-fno-omit-frame-pointer CMAKE_C_FLAGS CMAKE_LINKER_FLAGS)
add_if_flag_compiles(-fsanitize=undefined CMAKE_C_FLAGS CMAKE_LINKER_FLAGS)
endif()
if (ENABLE_MSAN)
add_if_flag_compiles(-fno-omit-frame-pointer CMAKE_C_FLAGS CMAKE_LINKER_FLAGS)
add_if_flag_compiles(-fsanitize=memory CMAKE_C_FLAGS CMAKE_LINKER_FLAGS)
endif()
if (ENABLE_MSAN AND ENABLE_ASAN)
# MSAN and ASAN both work on memory - ASAN does more things
MESSAGE(WARNING "Compiling with both AddressSanitizer and MemorySanitizer is not recommended")
endif()
add_definitions("-DRAYLIB_CMAKE=1")
if (ENABLE_ASAN)
# If enabled it would generate errors/warnings for all kinds of memory errors
# (like returning a stack variable by reference)
# https://clang.llvm.org/docs/AddressSanitizer.html
add_if_flag_compiles(-fno-omit-frame-pointer CMAKE_C_FLAGS CMAKE_LINKER_FLAGS)
add_if_flag_compiles(-fsanitize=address CMAKE_C_FLAGS CMAKE_LINKER_FLAGS)
endif()
if (ENABLE_UBSAN)
# If enabled this will generate errors for undefined behavior points
# (like adding +1 to the maximum int value)
# https://clang.llvm.org/docs/UndefinedBehaviorSanitizer.html
add_if_flag_compiles(-fno-omit-frame-pointer CMAKE_C_FLAGS CMAKE_LINKER_FLAGS)
add_if_flag_compiles(-fsanitize=undefined CMAKE_C_FLAGS CMAKE_LINKER_FLAGS)
endif()
if (ENABLE_MSAN)
# If enabled this will generate warnings for places where uninitialized memory is used
# https://clang.llvm.org/docs/MemorySanitizer.html
add_if_flag_compiles(-fno-omit-frame-pointer CMAKE_C_FLAGS CMAKE_LINKER_FLAGS)
add_if_flag_compiles(-fsanitize=memory CMAKE_C_FLAGS CMAKE_LINKER_FLAGS)
endif()
if(CMAKE_VERSION VERSION_LESS "3.1")
if(CMAKE_C_COMPILER_ID STREQUAL "GNU")