llvm-project/llvm/lib/Linker/CMakeLists.txt

add_llvm_component_library(LLVMLinker
  IRMover.cpp
  LinkModules.cpp

  ADDITIONAL_HEADER_DIRS
  ${LLVM_MAIN_INCLUDE_DIR}/llvm/Linker

  DEPENDS
  intrinsics_gen

  LINK_COMPONENTS
  Core
  Object
  Support
  TransformUtils
  )
[cmake] Explicitly mark libraries defined in lib/ as "Component Libraries" Summary: Most libraries are defined in the lib/ directory but there are also a few libraries defined in tools/ e.g. libLLVM, libLTO. I'm defining "Component Libraries" as libraries defined in lib/ that may be included in libLLVM.so. Explicitly marking the libraries in lib/ as component libraries allows us to remove some fragile checks that attempt to differentiate between lib/ libraries and tools/ libraires: 1. In tools/llvm-shlib, because llvm_map_components_to_libnames(LIB_NAMES "all") returned a list of all libraries defined in the whole project, there was custom code needed to filter out libraries defined in tools/, none of which should be included in libLLVM.so. This code assumed that any library defined as static was from lib/ and everything else should be excluded. With this change, llvm_map_components_to_libnames(LIB_NAMES, "all") only returns libraries that have been added to the LLVM_COMPONENT_LIBS global cmake property, so this custom filtering logic can be removed. Doing this also fixes the build with BUILD_SHARED_LIBS=ON and LLVM_BUILD_LLVM_DYLIB=ON. 2. There was some code in llvm_add_library that assumed that libraries defined in lib/ would not have LLVM_LINK_COMPONENTS or ARG_LINK_COMPONENTS set. This is only true because libraries defined lib lib/ use LLVMBuild.txt and don't set these values. This code has been fixed now to check if the library has been explicitly marked as a component library, which should now make it easier to remove LLVMBuild at some point in the future. I have tested this patch on Windows, MacOS and Linux with release builds and the following combinations of CMake options: - "" (No options) - -DLLVM_BUILD_LLVM_DYLIB=ON - -DLLVM_LINK_LLVM_DYLIB=ON - -DBUILD_SHARED_LIBS=ON - -DBUILD_SHARED_LIBS=ON -DLLVM_BUILD_LLVM_DYLIB=ON - -DBUILD_SHARED_LIBS=ON -DLLVM_LINK_LLVM_DYLIB=ON Reviewers: beanz, smeenai, compnerd, phosek Reviewed By: beanz Subscribers: wuzish, jholewinski, arsenm, dschuff, jyknight, dylanmckay, sdardis, nemanjai, jvesely, nhaehnle, mgorny, mehdi_amini, sbc100, jgravelle-google, hiraditya, aheejin, fedor.sergeev, asb, rbar, johnrusso, simoncook, apazos, sabuasal, niosHD, jrtc27, MaskRay, zzheng, edward-jones, atanasyan, steven_wu, rogfer01, MartinMosbeck, brucehoult, the_o, dexonsmith, PkmX, jocewei, jsji, dang, Jim, lenary, s.egerton, pzheng, sameer.abuasal, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D70179 2019-11-14 13:39:58 +08:00			`add_llvm_component_library(LLVMLinker`
Slit lib/Linker in two. A linker normally has two stages: symbol resolution and "moving stuff". In lib/Linker there is the complication of lazy linking some globals, but it was still far more mixed than it needed to. This splits the linker into a lower level IRMover and the linker proper. The IRMover just takes a list of globals to move and a callback that lets the user control what is lazy linked. The main motivation is that now tools/gold (and soon lld) can use their own symbol resolution to instruct IRMover what to do. llvm-svn: 255254 2015-12-10 22:19:35 +08:00			`IRMover.cpp`
Initial support for the CMake build system. llvm-svn: 56419 2008-09-22 09:08:49 +08:00			`LinkModules.cpp`
Use ADDITIONAL_HEADER_DIRS in all LLVM CMake projects. This allows IDEs to recognize the entire set of header files for each of the core LLVM projects. Differential Revision: http://reviews.llvm.org/D7526 Reviewed By: Chris Bieneman llvm-svn: 228798 2015-02-11 11:28:02 +08:00
			`ADDITIONAL_HEADER_DIRS`
			`${LLVM_MAIN_INCLUDE_DIR}/llvm/Linker`
modules: Add explicit dependency on intrinsics_gen `LLVM_ENABLE_MODULES` builds sometimes fail because `Intrinsics.td` needs to regenerate `Instrinsics.h` before anyone can include anything from the LLVM_IR module. Represent the dependency explicitly to prevent that. llvm-svn: 239796 2015-06-16 08:44:12 +08:00
			`DEPENDS`
			`intrinsics_gen`
llvmbuildectomy - replace llvm-build by plain cmake No longer rely on an external tool to build the llvm component layout. Instead, leverage the existing `add_llvm_componentlibrary` cmake function and introduce `add_llvm_component_group` to accurately describe component behavior. These function store extra properties in the created targets. These properties are processed once all components are defined to resolve library dependencies and produce the header expected by llvm-config. Differential Revision: https://reviews.llvm.org/D90848 2020-10-10 00:41:21 +08:00
			`LINK_COMPONENTS`
			`Core`
[ThinLTO] Import symver directives for imported symbols (PR48214) When importing symbols from another module, also import any corresponding symver directives. Differential revision: https://reviews.llvm.org/D92335 2020-11-30 23:21:54 +08:00			`Object`
llvmbuildectomy - replace llvm-build by plain cmake No longer rely on an external tool to build the llvm component layout. Instead, leverage the existing `add_llvm_componentlibrary` cmake function and introduce `add_llvm_component_group` to accurately describe component behavior. These function store extra properties in the created targets. These properties are processed once all components are defined to resolve library dependencies and produce the header expected by llvm-config. Differential Revision: https://reviews.llvm.org/D90848 2020-10-10 00:41:21 +08:00			`Support`
			`TransformUtils`
Initial support for the CMake build system. llvm-svn: 56419 2008-09-22 09:08:49 +08:00			`)`