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Summary: This patch illustrates some of the features like modularity we want in the new libc. Few other ideas like different kinds of testing, redirectors etc are not yet present. Reviewers: dlj, hfinkel, theraven, jfb, alexshap, jdoerfert Subscribers: mgorny, dexonsmith, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D67867 llvm-svn: 373764
25 lines
1006 B
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25 lines
1006 B
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LLVM libc build rules
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=====================
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At the cost of verbosity, we want to keep the build system of LLVM libc
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as simple as possible. We also want to be highly modular with our build
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targets. This makes picking and choosing desired pieces a straighforward
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task.
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Targets for entrypoints
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-----------------------
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Every entrypoint in LLVM-libc has its own build target. This target is listed
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using the ``add_entrypoint_object`` rule. This rule generates a single object
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file containing the implementation of the entrypoint.
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Targets for entrypoint libraries
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--------------------------------
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Standards like POSIX require that a libc provide certain library files like
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``libc.a``, ``libm.a``, etc. The targets for such library files are listed in
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the ``lib`` directory as ``add_entrypoint_library`` targets. An
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``add_entrypoint_library`` target takes a list of ``add_entrypoint_object``
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targets and produces a static library containing the object files corresponding
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to the ``add_entrypoint_targets``.
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