added cmakelist file to SwiftDocCUtilities

[johnbute]

Summary

swiftlang/swift builds are failing when building docs in windows due to SwiftDocCUtilities not having a CMakeLists.txt file.

`[2025-11-17 01:28:56] Building 'C:\Users\swift-ci\jenkins\workspace\swift-PR-windows\swift-docc' to 'T:\x86_64-unknown-windows-msvc\DocC' ...
C:\Program Files\CMake\bin\cmake.exe -B T:\x86_64-unknown-windows-msvc\DocC -S C:\Users\swift-ci\jenkins\workspace\swift-PR-windows\swift-docc -G Ninja -D ArgumentParser_DIR=T:/x86_64-unknown-windows-msvc/ArgumentParser/cmake/modules -D BUILD_SHARED_LIBS=YES -D CMAKE_BUILD_TYPE=Release -D CMAKE_C_COMPILER=T:/5/bin/clang-cl.exe -D CMAKE_C_COMPILER_TARGET=x86_64-unknown-windows-msvc -D CMAKE_C_FLAGS=/GS- /Gw /Gy /Oy /Oi /Zc:inline -D CMAKE_EXE_LINKER_FLAGS=/INCREMENTAL:NO /OPT:REF /OPT:ICF -D CMAKE_FIND_PACKAGE_PREFER_CONFIG=YES -D CMAKE_INSTALL_PREFIX=T:/Program Files/Swift/Toolchains/0.0.0+Asserts/usr -D CMAKE_MAKE_PROGRAM=C:/Program Files/Microsoft Visual Studio/2022/Community/Common7/IDE/CommonExtensions/Microsoft/CMake/Ninja/ninja.exe -D CMAKE_SHARED_LINKER_FLAGS=/INCREMENTAL:NO /OPT:REF /OPT:ICF -D CMAKE_STATIC_LIBRARY_PREFIX_Swift=lib -D CMAKE_Swift_COMPILER=T:/5/bin/swiftc.exe -D CMAKE_Swift_COMPILER_TARGET=x86_64-unknown-windows-msvc -D CMAKE_Swift_COMPILER_WORKS=YES -D CMAKE_Swift_FLAGS=-sdk "T:/Program Files/Swift/Platforms/Windows.platform/Developer/SDKs/Windows.sdk" -gnone -Xlinker /INCREMENTAL:NO -Xlinker /OPT:REF -Xlinker /OPT:ICF -D CMAKE_Swift_FLAGS_RELEASE=-O -D CMAKE_Swift_FLAGS_RELWITHDEBINFO=-O -D cmark-gfm_DIR=T:/Program Files/Swift/Toolchains/0.0.0+Asserts/usr/lib/cmake -D LMDB_DIR=T:/x86_64-unknown-windows-msvc/LMDB/cmake/modules -D SwiftASN1_DIR=T:/x86_64-unknown-windows-msvc/ASN1/cmake/modules -D SwiftCrypto_DIR=T:/x86_64-unknown-windows-msvc/Crypto/cmake/modules -D SwiftMarkdown_DIR=T:/x86_64-unknown-windows-msvc/Markdown/cmake/modules -D SymbolKit_DIR=T:/x86_64-unknown-windows-msvc/SymbolKit/cmake/modules
-- The C compiler identification is Clang 21.1.6 with MSVC-like command-line
-- The Swift compiler identification is Apple 6.3
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working C compiler: T:/5/bin/clang-cl.exe - skipped
-- Detecting C compile features
-- Detecting C compile features - done
CMake Error at Sources/CMakeLists.txt:11 (add_subdirectory):
The source directory

C:/Users/swift-ci/jenkins/workspace/swift-PR-windows/swift-docc/Sources/SwiftDocCUtilities

does not contain a CMakeLists.txt file.
`

[johnbute]

@swift-ci please test

[d-ronnqvist]

Is this sufficient for the Windows CMake build to work or does the "DocCCommon" target also need a CMakeLists file? Also, does the "SwiftDocC" CMakeLists file need to add the linking information for it?

[compnerd]

#1356 should address the required changes

[d-ronnqvist]

#1356 should address the required changes

So no changes are needed for the "DocCCommon" target?

[compnerd]

#1356 should address the required changes

So no changes are needed for the "DocCCommon" target?

That is rolled in, along with the changes to the file list for the SwiftDocC target, and its dependencies.

[d-ronnqvist]

Thanks for checking / confirming.