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[flang] Add FLANG_PARALLEL_COMPILE_JOBS option #95672

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Merged
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Jun 18, 2024
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[flang] Add FLANG_PARALLEL_COMPILE_JOBS option #95672

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fb0f076
[flang] Add FLANG_PARALLEL_COMPILE_JOBS option
tstellar Jun 15, 2024
dc13198
Update flang/CMakeLists.txt
tstellar Jun 17, 2024
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12 changes: 12 additions & 0 deletions flang/CMakeLists.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -445,6 +445,18 @@ if (APPLE)
endif()
endif()

# Set up job pools for flang. Some of the flang sources take a lot of memory to
# compile, so allow users to limit the number of parallel flang jobs. This is
# useful for building flang alongside several other projects since you can use
# the maximum number of build jobs for the other projects while limiting the
# number of flang compile jobs.
#
# We want this set to infinity by default
set(FLANG_PARALLEL_COMPILE_JOBS 0 CACHE STRING
"The maximum number of concurrent compilation jobs (Ninja only)")

set_property(GLOBAL APPEND PROPERTY JOB_POOLS flang_compile_job_pool=${FLANG_PARALLEL_COMPILE_JOBS})

include(CMakeParseArguments)
include(AddFlang)

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1 change: 1 addition & 0 deletions flang/cmake/modules/AddFlang.cmake
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Expand Up @@ -89,6 +89,7 @@ function(add_flang_library name)
set_property(GLOBAL APPEND PROPERTY FLANG_LIBS ${name})
endif()
set_property(GLOBAL APPEND PROPERTY FLANG_EXPORTS ${name})
set_property(TARGET obj.${name} PROPERTY JOB_POOL_COMPILE flang_compile_job_pool)
else()
# Add empty "phony" target
add_custom_target(${name})
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