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cmake: add support for bootstrapping with swiftly

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For hosts that have a swiftly-managed Swift compiler, we could not
bootstrap using those tools, because of some hardcoded assumptions
about where the `/lib` directory lives, relative to the `/bin`
directory that contains the detected `swiftc`.

This patch adds specific support for detecting when the `swiftc`
is coming from a swiftly install and uses the correct paths.

I've tested this patch on my Linux machine that has swiftly 1.0.1,
with the Swift 6.1.2 toolchain.
This commit is contained in:
Kavon Farvardin
2025-08-13 14:41:01 -07:00
parent 2caa726b0b
commit 771c99f895
4 changed files with 64 additions and 0 deletions
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13
tools/SourceKit/cmake/modules/AddSwiftSourceKit.cmake
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@@ -111,6 +111,19 @@ function(add_sourcekit_swift_runtime_link_flags target path HAS_SWIFT_MODULES)
# installed host toolchain.
get_filename_component(swift_bin_dir ${SWIFT_EXEC_FOR_SWIFT_MODULES} DIRECTORY)
get_filename_component(swift_dir ${swift_bin_dir} DIRECTORY)
# Detect and handle swiftly-managed hosts.
if(swift_bin_dir MATCHES ".*/swiftly/bin")
execute_process(COMMAND swiftly use --print-location
OUTPUT_VARIABLE swiftly_dir
ERROR_VARIABLE err)
if(err)
message(SEND_ERROR "Failed to find swiftly Swift compiler")
endif()
string(STRIP "${swiftly_dir}" swiftly_dir)
set(swift_dir "${swiftly_dir}/usr")
endif()
set(host_lib_dir "${swift_dir}/lib/swift/${SWIFT_SDK_${SWIFT_HOST_VARIANT_SDK}_LIB_SUBDIR}")
else()
set(host_lib_dir "${SWIFTLIB_DIR}/${SWIFT_SDK_${SWIFT_HOST_VARIANT_SDK}_LIB_SUBDIR}")