423bdb2bf2
Adds the remaining optional feature macros from the OpenCL C 3.0 spec (section 6.2.1 table). Targets can now enable these via OpenCLFeaturesMap returned by getSupportedOpenCLOpts(). Reverta84599f177(header‑only feature macros). Header‑only macros are difficult to disable on SPIR-V targets, and the prior undef approach (a60b8f4681) does not scale. After this PR, they can be disabled via `-cl-ext=-<feature>`. https://github.com/KhronosGroup/OpenCL-Docs/issues/1328 also notes that unconditional definition of the header‑only macros in opencl-c-base.h should be removed.
C language Family Front-end
Welcome to Clang.
This is a compiler front-end for the C family of languages (C, C++ and Objective-C) which is built as part of the LLVM compiler infrastructure project.
Unlike many other compiler frontends, Clang is useful for a number of things beyond just compiling code: we intend for Clang to be host to a number of different source-level tools. One example of this is the Clang Static Analyzer.
If you're interested in more (including how to build Clang) it is best to read the relevant websites. Here are some pointers:
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Information on Clang: http://clang.llvm.org/
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Building and using Clang: http://clang.llvm.org/get_started.html
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Clang Static Analyzer: http://clang-analyzer.llvm.org/
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Information on the LLVM project: http://llvm.org/
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If you have questions or comments about Clang, a great place to discuss them is on the Clang forums:
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If you find a bug in Clang, please file it in the LLVM bug tracker: