See attached build log.
(Please do not complain about the need for looking at the build log until you can provide an easy way to open bugs with the correct data picked out of a tinderbox log. Thanks.)
Created attachment 245625 [details]
Created attachment 245828 [details, diff]
Patch to fio-1.34.ebuild to fix LDFLAGS issue and avoid duplicate link call
This patch adds a sed call to fix the LDFLAGS issue reported in comment #0. While testing, I noticed that fio is linked again during the install phase. This is because the dependency rules specify that 'depend' has no prerequisites and that it is a prerequisite of fio. Thus, depend is always rebuilt, and everything which depends on it must then be rebuilt because 'depend' is now newer. As a minimal change, I simply delete the rule that makes 'depend' a prerequisite of 'fio'.
Fixed with permission from Robin.