What is the LLVM version bundled with Xcode?

Question

Up to Xcode 6 when typing clang --version we got the information on what LLVM version it was built:

Apple LLVM version 6.1.0 (clang-602.0.53) (based on LLVM 3.6.0svn)

But now with Xcode 7 we only get the following:

Apple LLVM version 7.0.0 (clang-700.0.72)

score 5 · Accepted Answer · answered Aug 22 '16 at 10:19

See https://gist.github.com/yamaya/2924292 in which an interesting comment says:

Looking at the sources (src/CMakeLists.txt), it appears AppleClang is based on (approximately) the following LLVM branches: clang-700.0.72 => LLVM 3.7.0 clang-700.1.76 => LLVM 3.7.0 clang-700.1.81 => LLVM 3.7.0 clang-703.0.29 => LLVM 3.8.0 clang-703.0.31 => LLVM 3.8.0

score 4 · Answer 2 · answered Oct 07 '15 at 16:02

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The LLVM version reported was always misleading. "3.6.0svn" means that code was branched some time after 3.5 and before 3.6. However, Apple also applies bunch of local changes and backports bug fixes, so there is no way in general to relate to a particular mainline revision. This is why they removed it. And really, one need to treat Apple-shipped clang as a separate compiler (compared to the mainline clang).

answered Oct 07 '15 at 16:02

Anton Korobeynikov

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So how do you find documentation about what features are supported? – hadley Oct 21 '15 at 11:50
@hadley, the only reliable way it to use __has_feature macro to check for a particular feature. Given the whole mess with the version, I wouldn't trust anything else. Is there any particulare "feature" you're interested in? – Anton Korobeynikov Oct 22 '15 at 01:00
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I meant feature in the sense of what command line flags does clang support. i.e. how do you get to the equivalent of http://clang.llvm.org/docs/UsersManual.html? `man clang` doesn't appear to be comprehensive. – hadley Oct 22 '15 at 13:12
`configure` script is the fallback, I guess. – Jack Wasey May 03 '17 at 01:39

J1ngB0 · Answer 3 · 2018-12-27T09:20:09.043

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The wiki had show us already. https://en.wikipedia.org/wiki/Xcode#Latest_versions

Actually we can check swift version the Xcode used, and see the llvm version in swift-llvm

For Xcode 10, the swift version is 4.2, from CMakeLists.txt we can get the llvm version is 6.0.1 if(NOT DEFINED LLVM_VERSION_MAJOR) set(LLVM_VERSION_MAJOR 6) endif() if(NOT DEFINED LLVM_VERSION_MINOR) set(LLVM_VERSION_MINOR 0) endif() if(NOT DEFINED LLVM_VERSION_PATCH) set(LLVM_VERSION_PATCH 1) endif()

And Apple should not use two versions of llvm in clang and swift :)

edited Dec 27 '18 at 09:20

answered Dec 27 '18 at 08:50

J1ngB0

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Not that the answer is wrong, but providing links is okay if you also provide the answer directly, that way even dead links won't impact your answer validity – Mikitori Dec 27 '18 at 08:58

score 1 · Answer 4 · answered Jun 10 '20 at 07:33

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wiki of xcode should be helpful.

Xcode7.0 => LLVM3.7.0

answered Jun 10 '20 at 07:33

CK98

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What is the LLVM version bundled with Xcode?

4 Answers4

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