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[CMake] Parallel make breaks on native tablegen

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Patch by Alex Wang

This patch resolves a parallelization issue that occurs when native tablegen targets are built at the same time. They both try to build libSupport and clobber each other causing the builds to fail.

llvm-svn: 249911
This commit is contained in:
Chris Bieneman 2015-10-09 22:26:04 +00:00
parent f5bab94d5d
commit b8bce812e5
1 changed files with 10 additions and 1 deletions
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11
cmake/modules/TableGen.cmake
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@ -70,6 +70,15 @@ function(add_public_tablegen_target target)
set(LLVM_COMMON_DEPENDS ${LLVM_COMMON_DEPENDS} ${target} PARENT_SCOPE)
endfunction()
if(LLVM_USE_HOST_TOOLS)
add_custom_command(OUTPUT LIB_LLVMSUPPORT
COMMAND ${CMAKE_COMMAND} --build . --target LLVMSupport --config Release
DEPENDS CONFIGURE_LLVM_NATIVE
WORKING_DIRECTORY ${LLVM_NATIVE_BUILD}
COMMENT "Building libLLVMSupport for native TableGen...")
add_custom_target(NATIVE_LIB_LLVMSUPPORT DEPENDS LIB_LLVMSUPPORT)
endif(LLVM_USE_HOST_TOOLS)
macro(add_tablegen target project)
set(${target}_OLD_LLVM_LINK_COMPONENTS ${LLVM_LINK_COMPONENTS})
set(LLVM_LINK_COMPONENTS ${LLVM_LINK_COMPONENTS} TableGen)
@ -109,7 +118,7 @@ macro(add_tablegen target project)
add_custom_command(OUTPUT ${${project}_TABLEGEN_EXE}
COMMAND ${CMAKE_COMMAND} --build . --target ${target} --config Release
DEPENDS CONFIGURE_LLVM_NATIVE ${target}
DEPENDS ${target} NATIVE_LIB_LLVMSUPPORT
WORKING_DIRECTORY ${LLVM_NATIVE_BUILD}
COMMENT "Building native TableGen...")
add_custom_target(${project}-tablegen-host DEPENDS ${${project}_TABLEGEN_EXE})