1 files changed, 47 insertions, 0 deletions
diff --git a/cmake/modules/LimitJobs.cmake b/cmake/modules/LimitJobs.cmake
new file mode 100644
index 000000000..591a9321b
--- /dev/null
+++ b/cmake/modules/LimitJobs.cmake
@@ -0,0 +1,47 @@
+set(MAX_COMPILE_MEM 3500 CACHE INTERNAL "maximum memory used by each compiling job (in MiB)")
+set(MAX_LINK_MEM 4500 CACHE INTERNAL "maximum memory used by each linking job (in MiB)")
+
+cmake_host_system_information(RESULT _num_cores QUERY NUMBER_OF_LOGICAL_CORES)
+cmake_host_system_information(RESULT _total_mem QUERY TOTAL_PHYSICAL_MEMORY)
+
+math(EXPR _avg_compile_jobs "${_total_mem} / ${MAX_COMPILE_MEM}")
+if(_avg_compile_jobs EQUAL 0)
+  set(_avg_compile_jobs 1)
+endif()
+if(_num_cores LESS _avg_compile_jobs)
+  set(_avg_compile_jobs ${_num_cores})
+endif()
+set(NINJA_MAX_COMPILE_JOBS "${_avg_compile_jobs}" CACHE STRING
+  "The maximum number of concurrent compilation jobs, for Ninja build system." FORCE)
+mark_as_advanced(NINJA_MAX_COMPILE_JOBS)
+if(NINJA_MAX_COMPILE_JOBS)
+  math(EXPR _heavy_compile_jobs "${_avg_compile_jobs} / 2")
+  if(_heavy_compile_jobs EQUAL 0)
+    set(_heavy_compile_jobs 1)
+  endif()
+  set_property(GLOBAL APPEND PROPERTY JOB_POOLS
+    avg_compile_job_pool=${NINJA_MAX_COMPILE_JOBS}
+    heavy_compile_job_pool=${_heavy_compile_jobs})
+  set(CMAKE_JOB_POOL_COMPILE avg_compile_job_pool)
+endif()
+
+math(EXPR _avg_link_jobs "${_total_mem} / ${MAX_LINK_MEM}")
+if(_avg_link_jobs EQUAL 0)
+  set(_avg_link_jobs 1)
+endif()
+if(_num_cores LESS _avg_link_jobs)
+  set(_avg_link_jobs ${_num_cores})
+endif()
+set(NINJA_MAX_LINK_JOBS "${_avg_link_jobs}" CACHE STRING
+  "The maximum number of concurrent link jobs, for Ninja build system." FORCE)
+mark_as_advanced(NINJA_MAX_LINK_JOBS)
+if(NINJA_MAX_LINK_JOBS)
+  math(EXPR _heavy_link_jobs "${_avg_link_jobs} / 2")
+  if(_heavy_link_jobs EQUAL 0)
+    set(_heavy_link_jobs 1)
+  endif()
+  set_property(GLOBAL APPEND PROPERTY JOB_POOLS
+    avg_link_job_pool=${NINJA_MAX_LINK_JOBS}
+    heavy_link_job_pool=${_heavy_link_jobs})
+  set(CMAKE_JOB_POOL_LINK avg_link_job_pool)
+endif()