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<p>Hi,</p>
<p>I just found the perl script for x86_64 assembly failed to detect Xcode 7 environment (Apple LLVM 7.x), and skipped generating AVX code for MAC OS ($avx variable is always false). The reason is Apple since Xcode 7.0 removed string "based on LLVM x.y.z" from
version information. Now the clang -v command returns:</p>
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Apple LLVM version 7.0.0 (clang-700.1.76)</p>
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Target: x86_64-apple-darwin15.0.0</p>
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Thread model: posix</p>
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<div>So the way to detect compiler version becomes to check either "LLVM version" or "clang-". Here is a patch to check the first string (take rsaz-avx2.pl as an example):</div>
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if (!$avx && `$ENV{CC} -v 2>&1` =~ /LLVM version ([0-9]+)\./) {</p>
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<span class="Apple-tab-span" style="white-space:pre"></span>$avx = ($1>=5) + ($1>=5);</p>
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<span class="Apple-tab-span" style="white-space:pre"></span>$addx = ($1>=5);</p>
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}</p>
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<div>Version number 5 is used but not 7 due to the reason Apple start AVX support from Xcode 5 (LLVM 5).</div>
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<div>A list of Xcode records can be found here:</div>
<div><a href="https://gist.github.com/yamaya/2924292" id="LPlnk213655" title="https://gist.github.com/yamaya/2924292
Cmd+Click or tap to follow the link">https://gist.github.com/yamaya/2924292</a>
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Xcode clang version record · GitHub</div>
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After today's update of command line tools/xcode I get: About Xcode: Version 6.3 (6D570) /usr/bin/clang++ --version Apple LLVM version 6.1.0 (clang-602.0.49) (based ...</div>
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<a id="LPUrlAnchor_14474367631440.5186906603630632" href="https://gist.github.com/yamaya/2924292" target="_blank" style="font-size: 11px; font-family: wf_segoe-ui_normal, 'Segoe UI', 'Segoe WP', Tahoma, Arial, sans-serif; text-decoration: none;">Read more...</a></div>
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