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[LLVM][Cygwin] Define _GNU_SOURCE on Cygwin as well. #138329

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Merged
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May 3, 2025
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[LLVM][Cygwin] Define _GNU_SOURCE on Cygwin as well. #138329

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12 changes: 6 additions & 6 deletions llvm/cmake/config-ix.cmake
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Original file line number Diff line number Diff line change
Expand Up @@ -86,15 +86,15 @@ endif()
# Keep this at the top to make sure we don't add _GNU_SOURCE dependent checks
# before adding it.
check_symbol_exists(__GLIBC__ stdio.h LLVM_USING_GLIBC)
if(LLVM_USING_GLIBC)
if(LLVM_USING_GLIBC OR CYGWIN)
add_compile_definitions(_GNU_SOURCE)
list(APPEND CMAKE_REQUIRED_DEFINITIONS "-D_GNU_SOURCE")
endif()

# enable 64bit off_t on 32bit systems using glibc
if(CMAKE_SIZEOF_VOID_P EQUAL 4)
add_compile_definitions(_FILE_OFFSET_BITS=64)
list(APPEND CMAKE_REQUIRED_DEFINITIONS "-D_FILE_OFFSET_BITS=64")
endif()
# enable 64bit off_t on 32bit systems using glibc
if(LLVM_USING_GLIBC AND CMAKE_SIZEOF_VOID_P EQUAL 4)
add_compile_definitions(_FILE_OFFSET_BITS=64)
list(APPEND CMAKE_REQUIRED_DEFINITIONS "-D_FILE_OFFSET_BITS=64")
endif()

# include checks
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