caio/clang-p2996
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[Clang][Cygwin] Disable shared libs on Cygwin by default (#138119)

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This change follows MinGW decisions, otherwise build with GCC fail with:
```
FAILED: bin/msys-clang-cpp-21.0git.dll lib/libclang-cpp.dll.a
...
/usr/lib/gcc/x86_64-pc-msys/13.3.0/../../../../x86_64-pc-msys/bin/ld: error: export ordinal too large: 92250
```

Co-authored-by: jeremyd2019 <github@jdrake.com>
This commit is contained in:
Mateusz Mikuła
2025-05-02 10:02:11 +02:00
committed by GitHub
parent db247ddc9d
commit 9bc20fbbad
2 changed files with 5 additions and 3 deletions
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5
clang/tools/CMakeLists.txt
View File

@@ -26,9 +26,10 @@ endif()
add_clang_subdirectory(c-index-test)
add_clang_subdirectory(clang-refactor)
# For MinGW we only enable shared library if LLVM_LINK_LLVM_DYLIB=ON.
# For MinGW/Cygwin we only enable shared library if LLVM_LINK_LLVM_DYLIB=ON.
# Without that option resulting library is too close to 2^16 DLL exports limit.
if(UNIX OR (MSVC AND LLVM_BUILD_LLVM_DYLIB_VIS) OR (MINGW AND LLVM_LINK_LLVM_DYLIB))
if((UNIX AND NOT CYGWIN) OR (MSVC AND LLVM_BUILD_LLVM_DYLIB_VIS) OR
((MINGW OR CYGWIN) AND LLVM_LINK_LLVM_DYLIB))
add_clang_subdirectory(clang-shlib)
endif()

3
clang/tools/libclang/CMakeLists.txt
View File

@@ -106,7 +106,8 @@ if (LLVM_EXPORTED_SYMBOL_FILE)
DEPENDS ${LIBCLANG_VERSION_SCRIPT_FILE})
endif()
if(LLVM_ENABLE_PIC OR (WIN32 AND NOT LIBCLANG_BUILD_STATIC))
if((NOT (WIN32 OR CYGWIN) AND LLVM_ENABLE_PIC) OR
((WIN32 OR CYGWIN) AND NOT LIBCLANG_BUILD_STATIC))
set(ENABLE_SHARED SHARED)
endif()