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[SwiftCompilerSources][build] Bump the minimum supported compiler version to 5.9 #76575

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Merged
merged 1 commit into from
May 13, 2025
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[SwiftCompilerSources][build] Bump the minimum supported compiler version to 5.9 #76575

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11 changes: 2 additions & 9 deletions SwiftCompilerSources/CMakeLists.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -101,19 +101,12 @@ function(add_swift_compiler_modules_library name)
set(swift_compile_options
"-color-diagnostics"
"-Xfrontend" "-validate-tbd-against-ir=none"
"${cxx_interop_flag}"
"-cxx-interoperability-mode=default"
"-Xfrontend" "-disable-target-os-checking"
"-Xcc" "-std=c++17"
"-Xcc" "-DCOMPILED_WITH_SWIFT" "-Xcc" "-DSWIFT_TARGET"
"-Xcc" "-UIBOutlet" "-Xcc" "-UIBAction" "-Xcc" "-UIBInspectable")

# Prior to 5.9, we have to use the experimental flag for C++ interop.
if (CMAKE_Swift_COMPILER_VERSION VERSION_LESS 5.9)
list(APPEND swift_compile_options "-Xfrontend" "-enable-experimental-cxx-interop")
else()
list(APPEND swift_compile_options "-cxx-interoperability-mode=default")
endif()

if (NOT BOOTSTRAPPING_MODE STREQUAL "HOSTTOOLS")
if(SWIFT_MIN_RUNTIME_VERSION)
list(APPEND swift_compile_options
Expand Down Expand Up @@ -327,7 +320,7 @@ else()
message(FATAL_ERROR "The Swift compiler (${CMAKE_Swift_COMPILER}) differs from the Swift compiler in SWIFT_NATIVE_SWIFT_TOOLS_PATH (${SWIFT_NATIVE_SWIFT_TOOLS_PATH}/swiftc).")
endif()

set(min_supported_swift_version 5.8)
set(min_supported_swift_version 5.9)
if(CMAKE_Swift_COMPILER_VERSION VERSION_LESS "${min_supported_swift_version}")
message(FATAL_ERROR
"Outdated Swift compiler: building with host tools requires Swift ${min_supported_swift_version} or newer. "
Expand Down