Date: Sat, 21 Nov 2015 18:24:18 +0100 From: u-uy74@...ey.se To: musl@...ts.openwall.com Subject: for information, gcc-4.2.3 miscompiles musl math Good to be aware of: gcc-4.2.3 miscompiles musl math since at least 1.1.6, tested while targeting i486, 1.0.x seems to have been alright. The symptom is that sin(larger-than-2*pi) yields large values like "sin(8.000000) = 21.709544". Looks like the argument reduction logic has changed in a way which is not compatible with gcc-4.2.3. I do not notice any problems while compiling musl with gcc-5.2, nor have a compelling reason to insist on using gcc-4.2.3 (somebody else might have though, gcc-4.2.3 is the last one under gpl 2). Regards, Rune
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