This is an auto-filed bug because sys-cluster/pacemaker fails to compile with -fno-common or gcc-10. The issue was originally discovered on amd64, but it may be reproducible on other arches as well. If you think that a different summary clarifies the issue better, feel free to change it. Attached build log and emerge --info. NOTE: To reproduce this issue you may want to set CFLAGS="${CFLAGS} -fno-common" or compile it with gcc-10 that enables -fno-common by default.
Created attachment 642288 [details] build.log build log and emerge --info
FWIU, this package has been revived. Please CC treecleaners again if the new 'maintainer' doesn't cope.
Fixed in 2.0.5 (https://gitweb.gentoo.org/repo/gentoo.git/commit/sys-cluster/pacemaker?id=8f24402dfd6437c52f328fd4f2b4f4412e244ace)