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Swift: support multithreaded compilation

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Query the number of logical CPUs available to enable parallel
compilation for Swift.
This commit is contained in:
Saleem Abdulrasool
2019-06-30 20:50:08 -07:00
parent 8a42cd155f
commit 08cd7f6a02
3 changed files with 19 additions and 6 deletions
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1
Help/manual/cmake-variables.7.rst
View File

@@ -98,6 +98,7 @@ Variables that Provide Information
/variable/CMAKE_STATIC_LIBRARY_PREFIX
/variable/CMAKE_STATIC_LIBRARY_SUFFIX
/variable/CMAKE_Swift_MODULE_DIRECTORY
/variable/CMAKE_Swift_NUM_THREADS
/variable/CMAKE_TOOLCHAIN_FILE
/variable/CMAKE_TWEAK_VERSION
/variable/CMAKE_VERBOSE_MAKEFILE

8
Help/variable/CMAKE_Swift_NUM_THREADS.rst Normal file
View File

@@ -0,0 +1,8 @@
CMAKE_Swift_NUM_THREADS
-----------------------
Number of threads for parallel compilation for Swift targets.
This variable controls the number of parallel jobs that the swift driver creates
for building targets. If not specified, it will default to the number of
logical CPUs on the host.

16
Modules/CMakeSwiftInformation.cmake
View File

@@ -49,11 +49,15 @@ if(NOT CMAKE_Swift_COMPILE_OBJECT)
set(CMAKE_Swift_COMPILE_OBJECT ":")
endif()
if(NOT CMAKE_Swift_NUM_THREADS MATCHES "^[0-9]+$")
cmake_host_system_information(RESULT CMAKE_Swift_NUM_THREADS QUERY NUMBER_OF_LOGICAL_CORES)
endif()
if(NOT CMAKE_Swift_CREATE_SHARED_LIBRARY)
if(CMAKE_Swift_COMPILER_TARGET)
set(CMAKE_Swift_CREATE_SHARED_LIBRARY "${CMAKE_Swift_COMPILER} -target <CMAKE_Swift_COMPILER_TARGET> -output-file-map <SWIFT_OUTPUT_FILE_MAP> -incremental -emit-library -o <TARGET> -module-name <SWIFT_MODULE_NAME> -module-link-name <SWIFT_LIBRARY_NAME> -emit-module -emit-module-path <SWIFT_MODULE> -emit-dependencies <DEFINES> <FLAGS> <INCLUDES> <SWIFT_SOURCES> <LINK_FLAGS> <LINK_LIBRARIES>")
set(CMAKE_Swift_CREATE_SHARED_LIBRARY "${CMAKE_Swift_COMPILER} -target <CMAKE_Swift_COMPILER_TARGET> -output-file-map <SWIFT_OUTPUT_FILE_MAP> -incremental -num-threads ${CMAKE_Swift_NUM_THREADS} -emit-library -o <TARGET> -module-name <SWIFT_MODULE_NAME> -module-link-name <SWIFT_LIBRARY_NAME> -emit-module -emit-module-path <SWIFT_MODULE> -emit-dependencies <DEFINES> <FLAGS> <INCLUDES> <SWIFT_SOURCES> <LINK_FLAGS> <LINK_LIBRARIES>")
else()
set(CMAKE_Swift_CREATE_SHARED_LIBRARY "${CMAKE_Swift_COMPILER} -output-file-map <SWIFT_OUTPUT_FILE_MAP> -incremental -emit-library -o <TARGET> -module-name <SWIFT_MODULE_NAME> -module-link-name <SWIFT_LIBRARY_NAME> -emit-module -emit-module-path <SWIFT_MODULE> -emit-dependencies <DEFINES> <FLAGS> <INCLUDES> <SWIFT_SOURCES> <LINK_FLAGS> <LINK_LIBRARIES>")
set(CMAKE_Swift_CREATE_SHARED_LIBRARY "${CMAKE_Swift_COMPILER} -output-file-map <SWIFT_OUTPUT_FILE_MAP> -incremental -num-threads ${CMAKE_Swift_NUM_THREADS} -emit-library -o <TARGET> -module-name <SWIFT_MODULE_NAME> -module-link-name <SWIFT_LIBRARY_NAME> -emit-module -emit-module-path <SWIFT_MODULE> -emit-dependencies <DEFINES> <FLAGS> <INCLUDES> <SWIFT_SOURCES> <LINK_FLAGS> <LINK_LIBRARIES>")
endif()
endif()
@@ -63,17 +67,17 @@ endif()
if(NOT CMAKE_Swift_LINK_EXECUTABLE)
if(CMAKE_Swift_COMPILER_TARGET)
set(CMAKE_Swift_LINK_EXECUTABLE "${CMAKE_Swift_COMPILER} -target <CMAKE_Swift_COMPILER_TARGET> -output-file-map <SWIFT_OUTPUT_FILE_MAP> -incremental -emit-executable -o <TARGET> -emit-module -emit-module-path <SWIFT_MODULE> -emit-dependencies <DEFINES> <FLAGS> <INCLUDES> <SWIFT_SOURCES> <LINK_FLAGS> <LINK_LIBRARIES>")
set(CMAKE_Swift_LINK_EXECUTABLE "${CMAKE_Swift_COMPILER} -target <CMAKE_Swift_COMPILER_TARGET> -output-file-map <SWIFT_OUTPUT_FILE_MAP> -incremental -num-threads ${CMAKE_Swift_NUM_THREADS} -emit-executable -o <TARGET> -emit-module -emit-module-path <SWIFT_MODULE> -emit-dependencies <DEFINES> <FLAGS> <INCLUDES> <SWIFT_SOURCES> <LINK_FLAGS> <LINK_LIBRARIES>")
else()
set(CMAKE_Swift_LINK_EXECUTABLE "${CMAKE_Swift_COMPILER} -output-file-map <SWIFT_OUTPUT_FILE_MAP> -incremental -emit-executable -o <TARGET> -emit-module -emit-module-path <SWIFT_MODULE> -emit-dependencies <DEFINES> <FLAGS> <INCLUDES> <SWIFT_SOURCES> <LINK_FLAGS> <LINK_LIBRARIES>")
set(CMAKE_Swift_LINK_EXECUTABLE "${CMAKE_Swift_COMPILER} -output-file-map <SWIFT_OUTPUT_FILE_MAP> -incremental -num-threads ${CMAKE_Swift_NUM_THREADS} -emit-executable -o <TARGET> -emit-module -emit-module-path <SWIFT_MODULE> -emit-dependencies <DEFINES> <FLAGS> <INCLUDES> <SWIFT_SOURCES> <LINK_FLAGS> <LINK_LIBRARIES>")
endif()
endif()
if(NOT CMAKE_Swift_CREATE_STATIC_LIBRARY)
if(CMAKE_Swift_COMPILER_TARGET)
set(CMAKE_Swift_CREATE_STATIC_LIBRARY "${CMAKE_Swift_COMPILER} -target <CMAKE_Swift_COMPILER_TARGET> -output-file-map <SWIFT_OUTPUT_FILE_MAP> -incremental -emit-library -static -o <TARGET> -module-name <SWIFT_MODULE_NAME> -module-link-name <SWIFT_LIBRARY_NAME> -emit-module -emit-module-path <SWIFT_MODULE> -emit-dependencies <DEFINES> <FLAGS> <INCLUDES> <SWIFT_SOURCES> <LINK_FLAGS> <LINK_LIBRARIES>")
set(CMAKE_Swift_CREATE_STATIC_LIBRARY "${CMAKE_Swift_COMPILER} -target <CMAKE_Swift_COMPILER_TARGET> -output-file-map <SWIFT_OUTPUT_FILE_MAP> -incremental -num-threads ${CMAKE_Swift_NUM_THREADS} -emit-library -static -o <TARGET> -module-name <SWIFT_MODULE_NAME> -module-link-name <SWIFT_LIBRARY_NAME> -emit-module -emit-module-path <SWIFT_MODULE> -emit-dependencies <DEFINES> <FLAGS> <INCLUDES> <SWIFT_SOURCES> <LINK_FLAGS> <LINK_LIBRARIES>")
else()
set(CMAKE_Swift_CREATE_STATIC_LIBRARY "${CMAKE_Swift_COMPILER} -output-file-map <SWIFT_OUTPUT_FILE_MAP> -incremental -emit-library -static -o <TARGET> -module-name <SWIFT_MODULE_NAME> -module-link-name <SWIFT_LIBRARY_NAME> -emit-module -emit-module-path <SWIFT_MODULE> -emit-dependencies <DEFINES> <FLAGS> <INCLUDES> <SWIFT_SOURCES> <LINK_FLAGS> <LINK_LIBRARIES>")
set(CMAKE_Swift_CREATE_STATIC_LIBRARY "${CMAKE_Swift_COMPILER} -output-file-map <SWIFT_OUTPUT_FILE_MAP> -incremental -num-threads ${CMAKE_Swift_NUM_THREADS} -emit-library -static -o <TARGET> -module-name <SWIFT_MODULE_NAME> -module-link-name <SWIFT_LIBRARY_NAME> -emit-module -emit-module-path <SWIFT_MODULE> -emit-dependencies <DEFINES> <FLAGS> <INCLUDES> <SWIFT_SOURCES> <LINK_FLAGS> <LINK_LIBRARIES>")
endif()
set(CMAKE_Swift_ARCHIVE_CREATE "<CMAKE_AR> crs <TARGET> <OBJECTS>")