Install of Postgis 2.1 on Gentoo generates warning: "may exhibit random runtime failures"

[jlpoole]

Install of Postgis 2.1 (I built a custom ebuild to pull 2.1 in since that version currently is not offered by Gentoo's package manager) warns:

* QA Notice: Package triggers severe warnings which indicate that it
 *            may exhibit random runtime failures.
 * generator.c:73: warning: implicit declaration of function 'trim_trailing_zeros'
 
 * Please do not file a Gentoo bug and instead report the above QA
 * issues directly to the upstream developers of this software.
 * Homepage: http://postgis.net

I pasted the build output, 1222 lines, at ​http://pastebin.com/3etJUx2Q and I can attach it to this bug if someone desires it. The pastebin will only be active for 30 days. Specifically see line 1187 for the above quoted message.

The install otherwise proceeded without failure. It is disconcerting to be warned that there could be a runtime failure.

[robe]

Not too much concern for the actual running of postgis. The generator.c is only used to generate the images in the postgis manual. Pushing this to next micro since I don't want to hold up 2.1.1 for this.