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cmake: use nproc if _num_cores is zero #259

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Nov 26, 2023
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cmake: use nproc if _num_cores is zero #259

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6 changes: 5 additions & 1 deletion cmake/modules/LimitJobs.cmake
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Original file line number Diff line number Diff line change
Expand Up @@ -5,7 +5,11 @@ cmake_host_system_information(RESULT _num_cores QUERY NUMBER_OF_LOGICAL_CORES)
# This will never be zero on a real system, but it can be if you're doing
# weird things like trying to cross-compile using qemu emulation.
if(_num_cores EQUAL 0)
set(_num_cores 1)
execute_process(
COMMAND "nproc"
OUTPUT_VARIABLE _num_cores
OUTPUT_STRIP_TRAILING_WHITESPACE)
message(WARNING "Unable to query NUMBER_OF_LOGICAL_CORES, defaulting to nproc (${_num_cores})")
endif()
cmake_host_system_information(RESULT _total_mem QUERY TOTAL_PHYSICAL_MEMORY)

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