from bsd.port.mk(7):
FETCH_SYMLINK_DISTFILES
User settings. Set to `Yes' to link distribution files off
CDROM_SITE instead of copying them.
CDROM_SITE Path to a local source that holds distribution files
(usually a CD-ROM or other similar media), used to retrieve
distribution files before going to the network. Defaults
to empty, set to /cdrom/distfiles/${DIST_SUBDIR} to check
that path. Distribution files are still copied or linked
(see FETCH_SYMLINK_DISTFILES) into DISTDIR if they are
found under CDROM_SITE.
it says that the files are linked "if they are found under CDROM_SITE", but
it seems to link them regardless, and then complains.
$ ls -l /usr/ports/unace* /ext/distfiles/unace*
ls: /ext/distfiles/unace*: No such file or directory
ls: /usr/ports/unace*: No such file or directory
$ CDROM_SITE=/ext/distfiles FETCH_SYMLINK_DISTFILES=Yes make build
===> Checking files for unace-1.2bp1
>> cksum: cannot open unace-1.2b.tar.gz: No such file or directory
(SHA256) unace-1.2b.tar.gz: MISSING
>> Checksum mismatch for unace-1.2b.tar.gz. (sha256)
Make sure the Makefile and checksum file (/usr/ports/archivers/unace/distinfo)
are up to date. If you want to fetch a good copy of this
file from the OpenBSD main archive, type
"make REFETCH=true [other args]".
*** Error 1 in . (/usr/ports/infrastructure/mk/bsd.port.mk:2376
'_internal-checksum')
*** Error 1 in . (/usr/ports/infrastructure/mk/bsd.port.mk:2559
'/usr/ports/pobj/unace-1.2b/.extract_done')
*** Error 1 in /usr/ports/archivers/unace
(/usr/ports/infrastructure/mk/bsd.port.mk:2476 'build')
$ ls -l /usr/ports/distfiles/unace-1.2b.tar.gz
lrwxr-xr-x 1 null wheel 32 Apr 21 16:51
/usr/ports/distfiles/unace-1.2b.tar.gz -> /ext/distfiles/unace-1.2b.tar.gz
$ ls -l /ext/distfiles/unace*
ls: /ext/distfiles/unace*: No such file or directory
so i added a test for the file before linking/copying, which seems to work
fine (though i am not entirely fluent in make.) this also fixes a 'problem'
wherein the error for copy is reported (which always seem a bit ugly to me).
$ CDROM_SITE="/ext/distfiles" make build
===> Verifying specs: c
===> found c.79.0
===> Checking files for unace-1.2bp1
cp: /ext/distfiles/unace-1.2b.tar.gz: No such file or directory
>> Fetch http://www.ibiblio.org/pub/Linux/utils/compress/unace-1.2b.tar.gz
unace-1.2b.tar.gz 100% |********************************| 43423 00:00
>> (SHA256) unace-1.2b.tar.gz: OK
===> Extracting for unace-1.2bp1
...
--- infrastructure/mk/bsd.port.mk.orig Fri Apr 10 19:45:45 2015
+++ infrastructure/mk/bsd.port.mk Tue Apr 21 17:04:14 2015
@@ -1216,10 +1216,11 @@ MASTER_SITES${_I} := ${MASTER_SITE_OVERRIDE} ${MASTER_
CDROM_SITE ?=
.if !empty(CDROM_SITE)
+_CDROM_OVERRIDE = test -f ${CDROM_SITE}/$$f &&
. if defined(FETCH_SYMLINK_DISTFILES)
-_CDROM_OVERRIDE = if ln -s ${CDROM_SITE}/$$f .; then exit 0; fi
+_CDROM_OVERRIDE += if ln -s ${CDROM_SITE}/$$f .; then exit 0; fi
. else
-_CDROM_OVERRIDE = if cp -f ${CDROM_SITE}/$$f .; then exit 0; fi
+_CDROM_OVERRIDE += if cp -f ${CDROM_SITE}/$$f .; then exit 0; fi
. endif
.else
_CDROM_OVERRIDE =:
