llvm-project/llvm/lib/Target/Hexagon/MCTargetDesc
Tom Stellard ab411801b8 [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
2019-11-21 10:48:08 -08:00
..
CMakeLists.txt [cmake] Explicitly mark libraries defined in lib/ as "Component Libraries" 2019-11-21 10:48:08 -08:00
HexagonAsmBackend.cpp Hexagon - fix uninitialized variable warnings. NFCI. 2019-11-14 14:21:16 +00:00
HexagonBaseInfo.h
HexagonELFObjectWriter.cpp [MC] Minor cleanup to MCFixup::Kind handling. NFC. 2019-08-23 01:00:55 +00:00
HexagonFixupKinds.h
HexagonInstPrinter.cpp Include what you use in HexagonInstPrinter.cpp 2019-06-03 11:41:22 +00:00
HexagonInstPrinter.h
HexagonMCAsmInfo.cpp
HexagonMCAsmInfo.h
HexagonMCChecker.cpp [llvm-mc] Add reportWarning() to MCContext 2019-08-08 19:13:23 +00:00
HexagonMCChecker.h
HexagonMCCodeEmitter.cpp Include what you use in HexagonMCCodeEmitter.cpp 2019-06-03 11:20:53 +00:00
HexagonMCCodeEmitter.h
HexagonMCCompound.cpp [Hexagon] getCompoundCandidateGroup - fix 'false' value is implicitly cast to unsigned warning. NFCI. 2019-11-05 21:37:53 +00:00
HexagonMCDuplexInfo.cpp
HexagonMCELFStreamer.cpp [Alignment][NFC] Remove unneeded llvm:: scoping on Align types 2019-09-27 12:54:21 +00:00
HexagonMCELFStreamer.h
HexagonMCExpr.cpp
HexagonMCExpr.h
HexagonMCInstrInfo.cpp Include what you use in HexagonMCInstrInfo.cpp 2019-06-03 11:25:37 +00:00
HexagonMCInstrInfo.h
HexagonMCShuffler.cpp Include what you use in HexagonMCShuffler.cpp 2019-06-03 11:14:05 +00:00
HexagonMCShuffler.h
HexagonMCTargetDesc.cpp [Mips] Use appropriate private label prefix based on Mips ABI 2019-10-23 12:24:35 +02:00
HexagonMCTargetDesc.h
HexagonShuffler.cpp Include what you use in HexagonShuffler.cpp 2019-06-03 11:14:20 +00:00
HexagonShuffler.h Include what you use in HexagonShuffler.h 2019-06-03 09:33:48 +00:00
LLVMBuild.txt