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[flang] Set compile definitions for flang-rt build on AIX #127919

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Feb 24, 2025
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[flang] Set compile definitions for flang-rt build on AIX #127919

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[flang] Set flang-rt build options for AIX
kkwli Feb 19, 2025
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kkwli Feb 24, 2025
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6 changes: 6 additions & 0 deletions flang-rt/CMakeLists.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -227,6 +227,12 @@ if (WIN32)
find_compiler_rt_library(builtins FLANG_RT_BUILTINS_LIBRARY)
endif ()

# Build with _XOPEN_SOURCE on AIX to avoid errors caused by _ALL_SOURCE.
# We need to enable the large-file API as well.
if (UNIX AND ${CMAKE_SYSTEM_NAME} MATCHES "AIX")
add_compile_definitions(_XOPEN_SOURCE=700)
add_compile_definitions(_LARGE_FILE_API)
endif ()

# Check whether the compiler can undefine a macro using the "-U" flag.
# Aternatively, we could use
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