diff --git a/CMake/DolphinLibraryTools.cmake b/CMake/DolphinLibraryTools.cmake index 7d62966fc7..99f5f7f8f4 100644 --- a/CMake/DolphinLibraryTools.cmake +++ b/CMake/DolphinLibraryTools.cmake @@ -1,3 +1,6 @@ +include(CheckCXXSourceCompiles) +include(CheckCXXSymbolExists) + # like add_library(new ALIAS old) but avoids add_library cannot create ALIAS target "new" because target "old" is imported but not globally visible. on older cmake # This can be replaced with a direct alias call once our minimum is cmake 3.18 function(dolphin_alias_library new old) @@ -148,3 +151,21 @@ function(dolphin_check_toolset_version LABEL VERSION_VAR MIN_VERSION) message(FATAL_ERROR "Requires ${LABEL} ${MIN_VERSION} or higher") endif() endfunction() + + +function(dolphin_check_std_version LABEL VERSION_MACRO MIN_VERSION) + check_cxx_symbol_exists(${VERSION_MACRO} version IS_${LABEL}) + if(NOT IS_${LABEL}) + return() + endif() + check_cxx_source_compiles([[ + #include + #if ${VERSION_MACRO} < ${MIN_VERSION} + #error + #endif + int main(){} + ]] HAS_MINIMUM_${LABEL}) + if(NOT HAS_MINIMUM_${LABEL}) + message(FATAL_ERROR "Requires ${LABEL} ${MIN_VERSION} or higher") + endif() +endfunction() diff --git a/CMakeLists.txt b/CMakeLists.txt index 389e8ae7ee..7258caeec8 100644 --- a/CMakeLists.txt +++ b/CMakeLists.txt @@ -54,6 +54,9 @@ set(GCC_min_version 12) set(Clang_min_version 15) set(AppleClang_min_version 14.0.3) set(MSVC_min_version 19.32) +# Standard libraries +set(libstdc++_min_version 12) # This should match GCC_min_version's major version. +set(libc++_min_version 150000) # This should match Clang_min_version in the format "xxyyzz" instead of "xx.yy.zz" dolphin_check_toolset_version("Xcode" XCODE_VERSION ${Xcode_min_version}) dolphin_check_toolset_version("MSVC Toolset" MSVC_TOOLSET_VERSION ${MSVC_toolset_min_version}) @@ -66,6 +69,12 @@ elseif(CMAKE_CXX_COMPILER_VERSION VERSION_LESS ${${COMPILER}_min_version}) message(FATAL_ERROR "Requires ${COMPILER} ${${COMPILER}_min_version} or higher") endif() +# libstdc++ is almost always used on Linux, even when using clang as the compiler. +# libc++ is used on the likes of Android, Apple devices, FreeBSD, and a few (very) rare Linux distros like Chimera Linux. +# Windows uses its own standard library named STL, which we check as part of the toolset above. (outside of MinGW which can use either libstdc++ or libc++) +dolphin_check_std_version("GNU_libstdc++" _GLIBCXX_RELEASE ${libstdc++_min_version}) +dolphin_check_std_version("LLVM_libc++" _LIBCPP_VERSION ${libc++_min_version}) + # Name of the Dolphin distributor. If you redistribute Dolphin builds (forks, # unofficial builds) please consider identifying your distribution with a # unique name here.