All the existing runtimes relies on flags which are set by AddLLVM
and HandleLLVMOptions. In the standalone case, they would include
these themselves, but when being built using LLVM runtimes we should
include these in the top-level runtimes CMake files.
Differential Revision: https://reviews.llvm.org/D28389
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This change enables building builtins for multiple different targets
using LLVM runtimes directory.
To specify the builtin targets to be built, use the LLVM_BUILTIN_TARGETS
variable, where the value is the list of targets. To pass a per target
variable to the builtin build, you can set BUILTINS_<target>_<variable>
where <variable> will be passed to the builtin build for <target>.
Differential Revision: https://reviews.llvm.org/D26652
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This patch builds on clang r284648, and allows the runtime directory to make the bootstrap builds depend on the builtin libraries.
This patch also make the bootstrap build depend on configuring the other runtimes because the libcxx headers are copied during configuration. I have left a TODO in the code to remove that once I come up with a better solution.
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Copy variable LLVM_BUILD_MAIN_SRC_DIR from LLVMConfig.cmake to
LLVM_MAIN_SRC_DIR as it is named for in-tree builds. This ensures that
add_lit_target() can reliably find llvm-lit which is not necessarily
in the PATH.
Differential Revision: https://reviews.llvm.org/D24503
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My previous attempt at this connected the sub-project check targets to the test-depends target instead of to the check-all target. That resulted in the tests running multiple times on bots that built "test-depends" and "check-all" in separate build invocations.
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This will enable other runtime projects to detect the presence of sanitizer runtimes by referring to the sanitizer targets directly.
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This allows the builtins archives to build into the correct subdirectory under the binary dir. Addresses the issue discussed in D24001.
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Generating the Components import file is useless if there are no components coming in from the runtimes configuration, so we should skip generation in that case.
This also should fix the configuration error that Renato reported on llvm-dev.
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This will expose the check targets for runtime project components into the top-level build. It will enable exposing targets like check-asan.
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We need to explicitly pass LLVM_INCLUDE_TESTS through from the top-level to the runtimes configuration because it isn't in LLVMConfig.cmake
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This patch adds support to the runtimes build for exposing sub-project targets through the high-level configuration. This will enable exposing the build, check and install targets for sub-project components (i.e. asan, check-asan, install-asan...).
This patch requires minor changes to the runtime projects to take advantage of it, and I'll phase those changes into Compiler-RT shortly.
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Each runtime project has a top-level target that is the name of the runtime (minus the "lib" prefix if applicable). This creates top-level targets mapping to runtime projects.
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The subproject interface being used for runtime libraries expects that llvm-config is passed into the subproject for consumption. We currently do this for every subproject, so we should expect that all LLVM ExternalProjects depend on llvm-config for the time being.
Eventually I'd like to see the sub-projects using LLVMConfig.cmake instead of the llvm-config binary, but that will take time to roll out.
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Summary:
There are a few LLVM projects that produce runtime libraries. Ideally
runtime libraries should be built differently than other projects,
specifically they should be built using the just-built toolchain.
There is support for building compiler-rt in this way from the clang
build. Moving this logic into the LLVM build is interesting because it
provides a simpler way to extend the just-built toolchain to include
LLD and the LLVM object file tools.
Once this functionality is better fleshed out and tested we’ll want to
encapsulate it in a module that can be used for clang standalone
builds, and we’ll want to make it the default way to build compiler-rt.
With this patch applied there is no immediate change in the build.
Moving compiler-rt out from llvm/projects into llvm/runtimes enables
the functionality.
This code has a few improvements over the method provided by
LLVM_BUILD_EXTERNAL_COMPILER_RT. Specifically the sub-ninja command is
always invoked, so changes to compiler-rt source files will get built
properly, so this patch can be used for iterative development with
just-built tools.
This first patch only works with compiler-rt. Support for other
runtime projects will be coming in follow-up patches.
Reviewers: chandlerc, bogner
Subscribers: kubabrecka, llvm-commits
Differential Revision: http://reviews.llvm.org/D20992
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