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[CMake] In LLVM unified builds, depend on the generation of Clang headers #70144

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Dec 2, 2023
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[CMake] In LLVM unified builds, depend on the generation of Clang headers #70144

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9 changes: 9 additions & 0 deletions SwiftCompilerSources/CMakeLists.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -263,6 +263,15 @@ else()
add_library(importedHeaderDependencies "${CMAKE_CURRENT_BINARY_DIR}/HeaderDependencies.cpp")
target_include_directories(importedHeaderDependencies PRIVATE "${CMAKE_CURRENT_SOURCE_DIR}/../include/swift")

# When building unified, we need to make sure all the Clang headers are
# generated before we try to use them.
# When building Swift against an already compiled LLVM/Clang, like
# build-script does, this target does not exist, but the headers
# are already completely generated at that point.
if(TARGET clang-tablegen-targets)
add_dependencies(importedHeaderDependencies clang-tablegen-targets)
endif()

if(BOOTSTRAPPING_MODE MATCHES "HOSTTOOLS|CROSSCOMPILE")

if (NOT SWIFT_EXEC_FOR_SWIFT_MODULES)
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