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36 lines
1.5 KiB
CMake
36 lines
1.5 KiB
CMake
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# Usage:
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# set (MAX_COMPILER_MEMORY 2000 CACHE INTERNAL "") # In megabytes
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# set (MAX_LINKER_MEMORY 3500 CACHE INTERNAL "")
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# include (cmake/limit_jobs.cmake)
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cmake_host_system_information(RESULT AVAILABLE_PHYSICAL_MEMORY QUERY AVAILABLE_PHYSICAL_MEMORY) # Not available under freebsd
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option(PARALLEL_COMPILE_JOBS "Define the maximum number of concurrent compilation jobs" "")
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if (NOT PARALLEL_COMPILE_JOBS AND AVAILABLE_PHYSICAL_MEMORY)
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math(EXPR PARALLEL_COMPILE_JOBS ${AVAILABLE_PHYSICAL_MEMORY}/2500) # ~2.5gb max per one compiler
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if (NOT PARALLEL_COMPILE_JOBS)
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set (PARALLEL_COMPILE_JOBS 1)
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endif ()
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endif ()
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if (PARALLEL_COMPILE_JOBS)
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set_property(GLOBAL APPEND PROPERTY JOB_POOLS compile_job_pool=${PARALLEL_COMPILE_JOBS})
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set(CMAKE_JOB_POOL_COMPILE compile_job_pool)
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endif ()
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option(PARALLEL_LINK_JOBS "Define the maximum number of concurrent link jobs" "")
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if (NOT PARALLEL_LINK_JOBS AND AVAILABLE_PHYSICAL_MEMORY)
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math(EXPR PARALLEL_LINK_JOBS ${AVAILABLE_PHYSICAL_MEMORY}/4000) # ~4gb max per one linker
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if (NOT PARALLEL_LINK_JOBS)
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set (PARALLEL_LINK_JOBS 1)
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endif ()
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endif ()
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if (PARALLEL_COMPILE_JOBS OR PARALLEL_LINK_JOBS)
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message(STATUS "Have ${AVAILABLE_PHYSICAL_MEMORY} megabytes of memory. Limiting concurrent linkers jobs to ${PARALLEL_LINK_JOBS} and compiler jobs to ${PARALLEL_COMPILE_JOBS}")
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endif ()
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if (LLVM_PARALLEL_LINK_JOBS)
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set_property(GLOBAL APPEND PROPERTY JOB_POOLS link_job_pool=${PARALLEL_LINK_JOBS})
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set(CMAKE_JOB_POOL_LINK link_job_pool)
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endif ()
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