hi,

just got this one doing a make fetch in /usr/pkgsrc:

===> package devel/bcc
Variable MASTER_SITES is recursive.
*** Error code 2

Stop.
*** Error code 1

Stop.

seems to be my assumption, that MASTER_SITES will always be
initialized by the package Makefile wasn't so good ;-)

so a better patch would be to initialize both MASTER_SITES and
PATCH_SITES in the else case:

.else
MASTER_SITES?=
PATCH_SITES?=
MASTER_SITES:=  ${MASTER_SITE_OVERRIDE} ${MASTER_SITES}
PATCH_SITES:=   ${MASTER_SITE_OVERRIDE} ${PATCH_SITES}
.endif

-ks