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[z/OS] Improve compiler options on z/OS #166415

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Merged
merged 2 commits into from
Nov 4, 2025
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[z/OS] Improve compiler options on z/OS #166415

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[z/OS] Improve compiler options on z/OS
redstar Nov 4, 2025
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redstar Nov 4, 2025
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2 changes: 1 addition & 1 deletion llvm/CMakeLists.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -1264,10 +1264,10 @@ endif()
# Build with _XOPEN_SOURCE on z/OS.
if (CMAKE_SYSTEM_NAME MATCHES "OS390")
add_compile_definitions(_XOPEN_SOURCE=600)
add_compile_definitions(_XPLATFORM_SOURCE)
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@abhina-sree abhina-sree Nov 4, 2025

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nit: can we add a comment that we need this for O_CLOEXEC

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@redstar redstar Nov 4, 2025

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Changed.

add_compile_definitions(_OPEN_SYS) # Needed for process information.
add_compile_definitions(_OPEN_SYS_FILE_EXT) # Needed for EBCDIC I/O.
add_compile_definitions(_EXT) # Needed for file data.
add_compile_definitions(_UNIX03_THREADS) # Multithreading support.
# Need to build LLVM as ASCII application.
# This can't be a global setting because other projects may
# need to be built in EBCDIC mode.
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