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| Xcode | cctools | ld64 | GCC | LLVM-GCC | Apple LLVM/Clang | Swift |
| --- | --- | --- | --- | --- | --- | --- |
| 1.0 |  ? |  ? |  3.3  3.1  2.95.2 | - | - |  |
| 1.5 |  ? |  ? |  3.3  3.1  2.95.2 | - | - |  |
| 2.2.1 | 590.23.2.obj~17 | 26.0.81 |  4.0.1 (Apple Computer, Inc. build 5250)  3.3 20030304 (Apple Computer, Inc. build 1819) | - | - |  |
| 2.3 |  ? |  ? |  4.0.1 (Apple Computer, Inc. build 5341)  3.3 20030304 (Apple Computer, Inc. build 1819) | - | - |  |
| 2.4 |  ? |  ? |  4.0.1 (Apple Computer, Inc. build 5363)  3.3 20030304 (Apple Computer, Inc. build 1819) | - | - |  |
| 2.4.1 |  ? |  ? |  4.0.1 (Apple Computer, Inc. build 5367)  3.3 20030304 (Apple Computer, Inc. build 1819) | - | - |  |
| 2.5 | 622.9 | 62.1 |  4.0.1 (Apple Computer, Inc. build 5370)  3.3 20030304 (Apple Computer, Inc. build 1819) | - | - |  |
| 3.0 | 667.3~21 | 77 |  4.0.1 (Apple Inc. build 5465)  3.3 20030304 (Apple Computer, Inc. build 1823) | - | - |  |
| 3.1 | 698~13 | 85 |  4.2.1 (Apple Inc. build 5564)  4.0.1 (Apple Inc. build 5484)  3.3 20030304 (Apple Computer, Inc. build 1823) | 4.2.1 (Based on Apple Inc. build 5555) (LLVM build 2039) | - | - |
| 3.1.1 |  ? |  ? |  4.2.1 (Apple Inc. build 5564)  4.0.1 (Apple Inc. build 5488)  3.3 20030304 (Apple Computer, Inc. build 1823) | 4.2.1 (Based on Apple Inc. build 5555) (LLVM build 2056) | - | - |
| 3.1.2 |  ? |  ? |  4.2.1 (Apple Inc. build 5566)  4.0.1 (Apple Inc. build 5490)  3.3 20030304 (Apple Computer, Inc. build 1823) | 4.2.1 (Based on Apple Inc. build 5555) (LLVM build 2056) | - | - |
| 3.1.3 |  ? |  ? |  4.2.1 (Apple Inc. build 5574)  4.0.1 (Apple Inc. build 5493)  3.3 20030304 (Apple Computer, Inc. build 1823) | 4.2.1 (Based on Apple Inc. build 5555) (LLVM build 2064.3) | - | - |
| 3.1.4 | 698.1 | 85.2.1 |  4.2.1 (Apple Inc. build 5577)  4.0.1 (Apple Inc. build 5493)  3.3 20030304 (Apple Computer, Inc. build 1823) | 4.2.1 (Based on Apple Inc. build 5555) (LLVM build 2064.3) | - | - |
| 3.2 | 750 | 95.2.12 |  4.2.1 (Apple Inc. build 5646)  4.0.1 (Apple Inc. build 5493) | 4.2.1 (Based on Apple Inc. build 5646) (LLVM build 2118) | - | - |
| 3.2.1 | 750 | 95.2.12 |  4.2.1 (Apple Inc. build 5646)  4.0.1 (Apple Inc. build 5493) | 4.2.1 (Based on Apple Inc. build 5646) (LLVM build 2206) | - | - |
| 3.2.2 | 773 | 97.2 |  4.2.1 (Apple Inc. build 5659)  4.0.1 (Apple Inc. build 5493) | 4.2.1 (Based on Apple Inc. build 5646) (LLVM build 2207.5) | clang version 1.0.2 (http://llvm.org/svn/llvm-project/cfe/tags/Apple/clang-32 exported) |  |
| 3.2.3 | 782 | 97.14 |  4.2.1 (Apple Inc. build 5664)  4.0.1 (Apple Inc. build 5494) | 4.2.1 (Based on Apple Inc. build 5658) (LLVM build 2326.10) | Apple clang version 1.5 (tags/Apple/clang-60) |  |
| 3.2.4 | 782 | 97.14 |  4.2.1 (Apple Inc. build 5664)  4.0.1 (Apple Inc. build 5494) | 4.2.1 (Based on Apple Inc. build 5658) (LLVM build 2326.10) | Apple clang version 1.5 (tags/Apple/clang-60) |  |
| 3.2.5 | 782 | 97.17 |  4.2.1 (Apple Inc. build 5664)  4.0.1 (Apple Inc. build 5494) | 4.2.1 (Based on Apple Inc. build 5658) (LLVM build 2333.4) | Apple clang version 1.6 (tags/Apple/clang-70) |  |
| 3.2.6 | 795~45 | 97.17 |  4.2.1 (Apple Inc. build 5666) (dot 3)  4.0.1 (Apple Inc. build 5494) | 4.2.1 (Based on Apple Inc. build 5658) (LLVM build 2335.6) | Apple clang version 1.7 (tags/Apple/clang-77) (based on LLVM 2.9svn) | - |
| 4.0 | 800 | 123.2 |  ? |  ? | Apple clang version 2.0 (tags/Apple/clang-137) (based on LLVM 2.9svn) | - |
| 4.0.1 |  ? |  ? | 4.2.1 (Apple Inc. build 5666) (dot 3) | 4.2.1 (Based on Apple Inc. build 5658) (LLVM build 2335.9) | Apple clang version 2.0 (tags/Apple/clang-138) (based on LLVM 2.9svn) | - |
| 4.0.2 | 800~26 | 123.2 | 4.2.1 (Apple Inc. build 5666) (dot 3) | 4.2.1 (Based on Apple Inc. build 5658) (LLVM build 2335.9) | Apple clang version 2.0 (tags/Apple/clang-139) (based on LLVM 2.9svn) | - |
| 4.1 | 806 | 123.2.1 | 4.2.1 (Apple Inc. build 5666) (dot 3) | 4.2.1 (Based on Apple Inc. build 5658) (LLVM build 2335.15.00) | Apple clang version 2.1 (tags/Apple/clang-163.7.1) (based on LLVM 3.0svn) | - |
| 4.2 | 809 | 127.2 | - | 4.2.1 (Based on Apple Inc. build 5658) (LLVM build 2336.1.00) | Apple clang version 3.0 (tags/Apple/clang-211.10.1) (based on LLVM 3.0svn) | - |
| 4.2.1 |  ? |  ? | - |  ? | Apple clang version 3.0 (tags/Apple/clang-211.12) (based on LLVM 3.0svn) | - |
| 4.3 | 822 | 112 | - |  ? | Apple clang version 3.1 (tags/Apple/clang-318.0.45) (based on LLVM 3.1svn) | - |
| 4.3.1 |  ? |  ? | - |  ? | Apple clang version 3.1 (tags/Apple/clang-318.0.54) (based on LLVM 3.1svn) | - |
| 4.3.2 |  ? |  ? | - |  ? | Apple clang version 3.1 (tags/Apple/clang-318.0.58) (based on LLVM 3.1svn) |  |
| 4.3.3 | 822 | 128.2 | - | 4.2.1 (Based on Apple Inc. build 5658) (LLVM build 2336.9.00) | Apple clang version 3.1 (tags/Apple/clang-318.0.61) (based on LLVM 3.1svn) | - |
| 4.4 | 829 | 133.3 | - |  ? | Apple clang version 4.0 (tags/Apple/clang-421.0.57) (based on LLVM 3.1svn) | - |
| 4.4.1 |  ? |  ? | - |  ? | Apple clang version 4.0 (tags/Apple/clang-421.0.60) (based on LLVM 3.1svn) | - |
| 4.5 | 836 | 134.9 | - | 4.2.1 (Based on Apple Inc. build 5658) (LLVM build 2336.11.00) | Apple clang version 4.1 (tags/Apple/clang-421.11.65) (based on LLVM 3.1svn) | - |
| 4.5.1 |  ? |  ? | - | 4.2.1 (Based on Apple Inc. build 5658) (LLVM build 2336.11.00) | Apple clang version 4.1 (tags/Apple/clang-421.11.66) (based on LLVM 3.1svn) | - |
| 4.5.2 |  ? |  ? | - | 4.2.1 (Based on Apple Inc. build 5658) (LLVM build 2336.11.00) | Apple clang version 4.1 (tags/Apple/clang-421.11.66) (based on LLVM 3.1svn) | - |
| 4.6 | 839 | 136 | - | 4.2.1 (Based on Apple Inc. build 5658) (LLVM build 2336.11.00) | Apple LLVM version 4.2 (clang-425.0.24) (based on LLVM 3.2svn) | - |
| 4.6.1 | 839 | 136 | - | 4.2.1 (Based on Apple Inc. build 5658) (LLVM build 2336.11.00) | Apple LLVM version 4.2 (clang-425.0.27) (based on LLVM 3.2svn) | - |
| 4.6.2 | 839 | 136 | - | 4.2.1 (Based on Apple Inc. build 5658) (LLVM build 2336.11.00) | Apple LLVM version 4.2 (clang-425.0.28) (based on LLVM 3.2svn) | - |
| 4.6.3 | 839 | 136 | - | 4.2.1 (Based on Apple Inc. build 5658) (LLVM build 2336.11.00) | Apple LLVM version 4.2 (clang-425.0.28) (based on LLVM 3.2svn) | - |
| 5.0 | 846.2.1 | 224.1 | - | - | Apple LLVM version 5.0 (clang-500.2.75) (based on LLVM 3.3svn) | - |
| 5.0.1 | 846.2.4 | 224.1 | - | - | Apple LLVM version 5.0 (clang-500.2.79) (based on LLVM 3.3svn) | - |
| 5.0.2 | 846.2.4 | 224.1 | - | - | Apple LLVM version 5.0 (clang-500.2.79) (based on LLVM 3.3svn) | - |
| 5.1 | 855 | 236.3 | - | - | Apple LLVM version 5.1 (clang-503.0.38) (based on LLVM 3.4svn) | - |
| 5.1.1 | 855 | 236.4 | - | - | Apple LLVM version 5.1 (clang-503.0.40) (based on LLVM 3.4svn) | - |
| 6.0.1 |  ? |  ? | - | - | 6.0 (clang-600.0.51) (based on LLVM 3.5svn) | 1.0 (swift-600.0.51.4) |
| 6.1 |  ? |  ? | - | - | 6.0 (clang-600.0.54) (based on LLVM 3.5svn) | 1.1 (swift-600.0.54.20) |
| 6.1.1 | 862 | 241.9 | - | - | 6.0 (clang-600.0.56) (based on LLVM 3.5svn) | 1.1 (swift-600.0.56.1) |
| 6.2 | Apple Inc version cctools-862, GNU assembler version 1.38 | 241.9 | - | - | 6.0 (clang-600.0.57) (based on LLVM 3.5svn) | 1.1 (swift-600.0.57.4) |
| 8.2.1 | Apple Inc. version cctools-895 | 274.2 | - | - | Apple LLVM version 8.0.0 (clang-800.0.42.1) | Apple Swift version 3.0.2 (swiftlang-800.0.63 clang-800.0.42.1) |