Created attachment 525452 [details, diff] configure patch for musl ieee math And it's not a very good test, so I replaced it with functional checks for isnan and isinf (configure fails on the latter). The patch is in my fork on github; I'll upload it here for your convenience. https://github.com/gentoo/musl/blob/b4754e384cc2e5bd9e8bdcbae4764c11bdce7be0/app-office/dia/files/dia-0.97.3-fix-detection-of-isinf.patch
Sorry, bad link from a diff view; this one should work: https://github.com/sarnold/musl/blob/master/app-office/dia/files/dia-0.97.3-fix-detection-of-isinf.patch
This bug misses a log, but I think it is the same error I get
tinderbox_musl has reproduced this issue with version 0.97.3-r1 - Updating summary.