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Author SHA1 Message Date
Andrew Kaster
061d36d603
Merge e467b38d3d into 63a5717bc7 2024-11-20 16:09:04 -05:00
Andrew Kaster
e467b38d3d CMake: Check for Swift-aware C++ compiler more robustly 
Instead of looking for "AppleClang", we can just check whether the
CMAKE_CXX_COMPILER understands swift_attr and swift_name.
 2024-11-20 10:47:03 -07:00
1 changed files with 9 additions and 8 deletions
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17
Meta/CMake/Swift/swift-settings.cmake
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@ -1,16 +1,17 @@
enable_language(Swift)
if (CMAKE_Swift_COMPILER_VERSION VERSION_LESS 6.0)
message(FATAL_ERROR
"Swift 6.0 or newer is required to parse C++ headers in C++23 mode"
)
message(FATAL_ERROR "Swift 6.0 or newer is required to parse C++ headers in C++23 mode")
endif()
# FIXME: How to verify this on non-Apple?
if (APPLE AND NOT CMAKE_CXX_COMPILER_ID STREQUAL "AppleClang")
message(FATAL_ERROR
"Swift files must use Clang that was bundled with swiftc"
)
# Check for a Swift-aware clang
include(CheckCXXSourceCompiles)
check_cxx_source_compiles([=[
struct __attribute__((swift_name("CxxS"))) __attribute__((swift_attr("~Copyable"))) S { int& x; };
int main() {}
]=] CXX_COMPILER_SUPPORTS_SWIFT_ATTRS)
if (NOT CXX_COMPILER_SUPPORTS_SWIFT_ATTRS)
message(FATAL_ERROR "A Swift-aware C++ compiler is required to build with Swift interop enabled")
endif()
include(${CMAKE_CURRENT_LIST_DIR}/InitializeSwift.cmake)