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#-------------------------------------------------------------------------------------------
# Compiler Flag Detection
#-------------------------------------------------------------------------------------------
include(CheckCXXCompilerFlag)
check_cxx_compiler_flag("-fchar8_t" EASTL_HAS_FCHAR8T_FLAG)
check_cxx_compiler_flag("/Zc:char8_t" EASTL_HAS_ZCCHAR8T_FLAG)
if(EASTL_HAS_FCHAR8T_FLAG)
set(EASTL_CHAR8T_FLAG "-fchar8_t")
set(EASTL_NO_CHAR8T_FLAG "-fno-char8_t")
elseif(EASTL_HAS_ZCCHAR8T_FLAG)
set(EASTL_CHAR8T_FLAG "/Zc:char8_t")
set(EASTL_NO_CHAR8T_FLAG "/Zc:char8_t-")
endif()
#-------------------------------------------------------------------------------------------
# Compiler Flags
#-------------------------------------------------------------------------------------------
if(UNIX AND "${CMAKE_CXX_COMPILER_ID}" STREQUAL "Intel" )
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11 -fasm-blocks" )
endif()
# NOT LESS == GREATER_OR_EQUAL; CMake doesn't support this out of the box.
if(CMAKE_CXX_COMPILER_ID MATCHES "AppleClang")
if(NOT (CMAKE_CXX_COMPILER_VERSION VERSION_LESS "6.2"))
SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++17")
endif()
if(CMAKE_CXX_COMPILER_VERSION VERSION_LESS "6.2" AND (NOT (CMAKE_CXX_COMPILER_VERSION VERSION_LESS "6.1")))
SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++14")
endif()
if(CMAKE_CXX_COMPILER_VERSION VERSION_LESS "6.1" AND (NOT (CMAKE_CXX_COMPILER_VERSION VERSION_LESS "4.3")))
SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++1y")
endif()
# It seems Apple started changing version numbers after 3.1, going straight to 4.0 after 3.1.
if(CMAKE_CXX_COMPILER_VERSION VERSION_LESS "4.3" AND (NOT (CMAKE_CXX_COMPILER_VERSION VERSION_LESS "3.1")))
SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")
endif()
if(CMAKE_CXX_COMPILER_VERSION VERSION_LESS "3.1")
message(FATAL_ERROR "Building with a Apple clang version less than 3.1 is not supported.")
endif()
elseif(CMAKE_CXX_COMPILER_ID MATCHES "Clang" AND NOT CMAKE_CXX_SIMULATE_ID MATCHES "MSVC") # clang, but not clang-cl.
# non-Apple clangs uses different versioning.
if(NOT (CMAKE_CXX_COMPILER_VERSION VERSION_LESS "5.0.0"))
SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++17")
endif()
if(CMAKE_CXX_COMPILER_VERSION VERSION_LESS "5.0.0" AND (NOT (CMAKE_CXX_COMPILER_VERSION VERSION_LESS "3.5.0")))
SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++14")
endif()
if(CMAKE_CXX_COMPILER_VERSION VERSION_LESS "3.5.0" AND (NOT (CMAKE_CXX_COMPILER_VERSION VERSION_LESS "3.2")))
SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++1y")
endif()
if(CMAKE_CXX_COMPILER_VERSION VERSION_LESS "3.2" AND (NOT (CMAKE_CXX_COMPILER_VERSION VERSION_LESS "3.0")))
SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")
endif()
if(CMAKE_CXX_COMPILER_VERSION VERSION_LESS "3.0")
message(FATAL_ERROR "Building with a clang version less than 3.0 is not supported.")
endif()
elseif(CMAKE_CXX_COMPILER_ID MATCHES "GNU")
if(NOT (CMAKE_CXX_COMPILER_VERSION VERSION_LESS "7.0.0"))
SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++17")
endif()
if((CMAKE_CXX_COMPILER_VERSION VERSION_LESS "7.0.0") AND (NOT (CMAKE_CXX_COMPILER_VERSION VERSION_LESS "5.2.0")))
SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++14")
endif()
if(CMAKE_CXX_COMPILER_VERSION VERSION_LESS "5.2.0" AND (NOT (CMAKE_CXX_COMPILER_VERSION VERSION_LESS "4.8.1")))
SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++1y")
endif()
if(CMAKE_CXX_COMPILER_VERSION VERSION_LESS "4.8.1" AND (NOT (CMAKE_CXX_COMPILER_VERSION VERSION_LESS "4.7.3")))
SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")
endif()
if(CMAKE_CXX_COMPILER_VERSION VERSION_LESS "4.7.3")
message(FATAL_ERROR "Building with a gcc version less than 4.7.3 is not supported.")
endif()
elseif(CMAKE_CXX_COMPILER_ID MATCHES "MSVC")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /std:c++latest /W4 /permissive-")
endif()
if (CMAKE_CXX_COMPILER_ID MATCHES "Clang" OR CMAKE_CXX_COMPILER_ID MATCHES "GNU")
set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -D_DEBUG")
set(CMAKE_C_FLAGS_DEBUG "${CMAKE_C_FLAGS_DEBUG} -D_DEBUG")
endif()
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