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https://github.com/RGBCube/serenity
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100 lines
3.2 KiB
Markdown
100 lines
3.2 KiB
Markdown
# Patches for llvm on SerenityOS
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## `0001-Support-Add-support-for-building-LLVM-on-SerenityOS.patch`
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Add support for building LLVM on SerenityOS
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Adds SerenityOS `#ifdef`s for platform-specific code.
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We stub out wait4, as SerenityOS doesn't support querying a child
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process's resource usage information.
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## `0002-Triple-Add-triple-for-SerenityOS.patch`
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Add triple for SerenityOS
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## `0003-Driver-Add-support-for-SerenityOS.patch`
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Add support for SerenityOS
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Adds support for the `$arch-pc-serenity` target to the Clang front end.
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This makes the compiler look for libraries and headers in the right
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places, and enables some security mitigations like stack-smashing
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protection and position-independent code by default.
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## `0004-Driver-Default-to-ftls-model-initial-exec-on-Serenit.patch`
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Default to -ftls-model=initial-exec on SerenityOS
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This is a hack to make Clang use the initial-exec TLS model instead of
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the default local-exec when building code for Serenity.
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This patch should be removed when we implement proper TLS support.
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## `0005-libc-Add-support-for-SerenityOS.patch`
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Add support for SerenityOS
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This commit teaches libc++ about what features are available in our
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LibC, namely:
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* We do not have locale support, so no-op shims should be used in place
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of the C locale API.
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* The number of errno constants defined by us is given by the value of
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the `ELAST` macro.
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* Multithreading is implemented though the pthread library.
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* Use libc++'s builtin character type table instead of the one provided
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by LibC as there's a lot of extra porting work to convince the rest of
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locale.cpp to use our character type table properly.
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## `0006-compiler-rt-Build-crtbegin.o-crtend.o-for-SerenityOS.patch`
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Build crtbegin.o/crtend.o for SerenityOS
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## `0007-cmake-Allow-undefined-symbols-on-SerenityOS.patch`
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Allow undefined symbols on SerenityOS
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Allow undefined symbols in LLVM libraries, which is needed because only
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stubs are available for SerenityOS libraries when libc++ and libunwind
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are built.
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## `0008-cmake-Support-building-shared-libLLVM-and-libClang-f.patch`
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Support building shared libLLVM and libClang for SerenityOS
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This patch tells CMake that the --whole-archive linker option should be
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used for specifying the archives whose members will constitute these
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shared libraries.
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Symbol versioning is disabled, as the SerenityOS loader doesn't support
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it, and the ELF sections that store version data would just waste space.
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## `0009-compiler-rt-llvm-Enable-profile-instrumentation-for-.patch`
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Enable profile instrumentation for SerenityOS
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Treat SerenityOS the same as other *NIX platforms that behave close
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enough to linux to use the pre-canned InstrProfiling implementation.
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Curiously, enabling profiling for the SerenityOS target changes the ELF
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OS ABI for userspace binaries to 3, or GNU/Linux.
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## `0010-Add-SerenityOS-to-config.guess.patch`
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Add SerenityOS to config.guess
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## `0011-llvm-Prevent-the-use-of-POSIX-shm-on-SerenityOS.patch`
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Prevent the use of POSIX shm on SerenityOS
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POSIX shm is not supported by SerenityOS yet, so this causes a
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compilation error.
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## `0012-cmake-Increase-the-default-stack-size-when-running-o.patch`
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cmake: Increase the default stack size when running on SerenityOS
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