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# Test if the Swift compiler returns success for supplied compiler arguments....
function(swift_supports_compiler_arguments out_var)
file(WRITE "${CMAKE_BINARY_DIR}/tmp/dummy.swift" "")
execute_process(
COMMAND "${CMAKE_Swift_COMPILER}" -parse ${ARGN} -
INPUT_FILE "${CMAKE_BINARY_DIR}/tmp/dummy.swift"
OUTPUT_QUIET ERROR_QUIET
RESULT_VARIABLE result
)
if(NOT result)
set("${out_var}" "TRUE" PARENT_SCOPE)
else()
set("${out_var}" "FALSE" PARENT_SCOPE)
endif()
endfunction()
# Test if the Swift compiler supports -disable-implicit-<module>-module-import.
macro(swift_supports_implicit_module module_name out_var)
swift_supports_compiler_arguments(${out_var}
-Xfrontend -disable-implicit-${module_name}-module-import
)
endmacro()
function(swift_get_swiftlang_version out_var)
execute_process(
COMMAND "${CMAKE_Swift_COMPILER}" -version
OUTPUT_VARIABLE output ERROR_VARIABLE output
RESULT_VARIABLE result
TIMEOUT 10
)
if(output MATCHES [[swiftlang-([0-9]+\.[0-9]+\.[0-9]+\.[0-9]+)]])
set("${out_var}" "${CMAKE_MATCH_1}" PARENT_SCOPE)
endif()
endfunction()
# Get "package cross-module-optimization" compiler arguments suitable for the compiler.
function(swift_get_package_cmo_support out_var)
# > 6.0 : Fixed feature.
swift_supports_compiler_arguments(result
-package-name my-package
-Xfrontend -package-cmo
-Xfrontend -allow-non-resilient-access
)
if(result)
set(${out_var} IMPLEMENTED PARENT_SCOPE)
return()
endif()
# == 6.0 : Experimental.
swift_supports_compiler_arguments(result
-package-name my-package
-Xfrontend -experimental-package-cmo
-Xfrontend -experimental-allow-non-resilient-access
-Xfrontend -experimental-package-bypass-resilience
)
if(result)
# Package CMO is implmented in Xcode 16 Beta 4 (swiftlang-6.0.0.6.8) or later.
# Consider it's not supported in non Xcode toolchain with "-experimental" options.
swift_get_swiftlang_version(swiftlang_version)
if(swiftlang_version AND swiftlang_version VERSION_GREATER_EQUAL 6.0.0.6)
set(${out_var} EXPERIMENTAL PARENT_SCOPE)
return()
endif()
endif()
# < 6.0 : Not supported.
set(${out_var} NO PARENT_SCOPE)
endfunction()
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