+# Helper function to check for linker flag support
+include(CheckCXXCompilerFlag)
+function(check_and_set_linker_flag flag name outvar)
+ cmake_push_check_state(RESET)
+ set(CMAKE_REQUIRED_FLAGS "${flag}")
+ check_cxx_compiler_flag("" LINKER_SUPPORTS_${name})
+ if (LINKER_SUPPORTS_${name})
+ set(${outvar} "${${outvar}} ${flag}" PARENT_SCOPE)
+ endif()
+ cmake_pop_check_state()
+endfunction()
+
+# General compile settings
+set(CMAKE_CXX_STANDARD 14)
+set(CMAKE_CXX_STANDARD_REQUIRED OFF) # Rely on compile features if standard is not supported
+set(CMAKE_CXX_EXTENSIONS OFF) # We like to be standard conform
+
+set(CMAKE_CXX_VISIBILITY_PRESET hidden)
+set(CMAKE_VISIBILITY_INLINES_HIDDEN ON)
+set(CMAKE_POSITION_INDEPENDENT_CODE ON)
+
+# For GCC and Clang, enable a whole bunch of warnings
+if (CMAKE_CXX_COMPILER_ID MATCHES "GNU|Clang")
+ add_compile_options(
+ -fdiagnostics-color=always
+ -fexceptions
+ -fno-common
+ -fstack-protector-strong
+ -Wall
+ -Wextra
+ -Wcast-align
+ -Wformat-security
+ -Wnon-virtual-dtor
+ -Woverloaded-virtual
+ -Wpedantic
+ -Wundef
+ -Wvla
+ -Werror=return-type
+ "$<$<BOOL:${FATAL_WARNINGS}>:-Werror>"
+ -Wno-unknown-pragmas
+ "$<$<NOT:$<CONFIG:Debug>>:-U_FORTIFY_SOURCE;-D_FORTIFY_SOURCE=2>"
+ )
+
+ # Check for and set linker flags
+ check_and_set_linker_flag("-Wl,-z,relro" RELRO LINKER_FLAGS)
+ check_and_set_linker_flag("-Wl,-z,now" NOW LINKER_FLAGS)
+ check_and_set_linker_flag("-Wl,--as-needed" AS_NEEDED LINKER_FLAGS)
+ check_and_set_linker_flag("-Wl,--enable-new-dtags" ENABLE_NEW_DTAGS LINKER_FLAGS)
+ check_and_set_linker_flag("-Wl,--no-undefined" NO_UNDEFINED LINKER_FLAGS)
+
+ set(CMAKE_EXE_LINKER_FLAGS "${LINKER_FLAGS} ${CMAKE_EXE_LINKER_FLAGS}")
+ set(CMAKE_MODULE_LINKER_FLAGS "${LINKER_FLAGS} ${CMAKE_MODULE_LINKER_FLAGS}")
+ set(CMAKE_SHARED_LINKER_FLAGS "${LINKER_FLAGS} ${CMAKE_SHARED_LINKER_FLAGS}")
+
+elseif(MSVC)
+ # Target Windows Vista
+ add_definitions(-D_WIN32_WINNT=0x0600 -DWINVER=0x0600 -D_WIN32_IE=0x0600)
+
+ # Various settings for the Windows API
+ add_definitions(-DWIN32_LEAN_AND_MEAN -DUNICODE -D_UNICODE -D_USE_MATH_DEFINES -DNOMINMAX)
+
+ # Compile options
+ add_compile_options(
+ /EHsc
+ "$<$<BOOL:${FATAL_WARNINGS}>:/WX>"
+ )
+
+ # Increase warning level on MSVC
+ # CMake puts /W3 in CMAKE_CXX_FLAGS which will be appended later, so we need to replace
+ string(REPLACE "/W3" "/W4" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
+
+ # Silence annoying/useless warnings
+ # C4127: conditional expression is constant
+ set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /wd4127")
+ # C4244: 'identifier': conversion from 't1' to 't2', possible loss of data
+ set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /wd4244")
+ # C4456: declaration of 'identifier' hides previous local declaration
+ set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /wd4456")
+ # C4458: declaration of 'identifier' hides class member
+ set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /wd4458")
+
+ # Link against the correct version of the C runtime
+ set(CMAKE_EXE_LINKER_FLAGS_RELEASE "/NODEFAULTLIB:libcmt /DEFAULTLIB:msvcrt ${CMAKE_EXE_LINKER_FLAGS_RELEASE}")
+ set(CMAKE_EXE_LINKER_FLAGS_RELWITHDEBINFO "/NODEFAULTLIB:libcmt /DEFAULTLIB:msvcrt ${CMAKE_EXE_LINKER_FLAGS_RELWITHDEBINFO}")
+ set(CMAKE_EXE_LINKER_FLAGS_MINSIZEREL "/NODEFAULTLIB:libcmt /DEFAULTLIB:msvcrt ${CMAKE_EXE_LINKER_FLAGS_MINSIZEREL}")
+ set(CMAKE_EXE_LINKER_FLAGS_DEBUG "/NODEFAULTLIB:libcmtd /DEFAULTLIB:msvcrtd ${CMAKE_EXE_LINKER_FLAGS_DEBUG}")