Gentoo's Bugzilla –
Attachment 634338 Details for
Bug 719198media-libs/gegl-0.3.34 CFLAGS=-fno-common - ld: gcut-util.o:.../work/gegl-0.3.34/gcut/gcut.h:237: multiple definition of `_GeglEDL'; gcut.o:.../work/gegl-0.3.34/gcut/gcut.h:237: first defined here