Package build errors

[Donald Allen <donaldcallen%gmail.com@localhost>]

I am attempting a 5.1 install on a Lenovo workstation. I don't think the
 particular hardware configuration is of interest here, so I won't 
include dmesg output, other than that it's amd64. As with a previous 
amd64 5.1 installation I did a week or so ago, I downloaded the 2010Q3 
pkgsrc tarball and attempted to build editors/emacs. This worked fine in
 the prior install, same pkgsrc tarball. Now, I get

rsvg-styles.c:951:31: error: libcroco/libcroco.h: No such file or 
directory
rsvg-styles.c:955: error: expected specifier-qualifier-list
 before 'CRSelector'
rsvg-styles.c: In function 'css_user_data_init':
rsvg-styles.c:962: error: 'CSSUserData' has no member named 'selector'
rsvg-styles.c:
 At top level:
rsvg-styles.c:966: error: expected ')' before '*' 
token
rsvg-styles.c:978: error: expected ')' before '*' token
rsvg-styles.c:991: error: expected ')' before '*' token
rsvg-styles.c:1027:
 error: expected ')' before '*' token
rsvg-styles.c:1035: error: 
expected ')' before '*' token
rsvg-styles.c:1043: error: expected ')' before '*' token
rsvg-styles.c:1048:
 error: expected ')' before '*' token
rsvg-styles.c: In function 
'rsvg_real_parse_cssbuffer':
rsvg-styles.c:1072: error: variable 
'status' has initializer but incomplete type
rsvg-styles.c:1072: error: 'CR_OK' undeclared (first use in this 
function)
rsvg-styles.c:1072: error: (Each undeclared identifier is 
reported only once
rsvg-styles.c:1072: error: for each function it 
appears in.)
rsvg-styles.c:1072: error: storage size of 'status' isn't known
rsvg-styles.c:1073:
 error: 'CRParser' undeclared (first use in this function)
rsvg-styles.c:1073:
 error: 'parser' undeclared (first use in this function)
rsvg-styles.c:1074: error: 'CRDocHandler' undeclared (first use in this 
function)
rsvg-styles.c:1074: error: 'css_handler' undeclared (first 
use in this function)
rsvg-styles.c:1084: error: 'CR_UTF_8' 
undeclared (first use in this function)
rsvg-styles.c: At top level:
rsvg-styles.c:1100: error: expected ')' 
before '*' token

Attempting to build graphics/gimp results in the
 same error.

The NetBSD pkgsrc documentation leads one to believe
 that these quarterly pkgsrc updates are "releases", e.g., they are 
referred to as "the stable 
	branch to be downloaded" in the pkgsrc guide instructions for getting 
pkgsrc via tarball. I'm surprised, therefore, that things are changing, 
working one week and not the next; obviously not "stable". This, and the
 fact that the nature of the error is that things don't build (much more
 easily detectable mechanically than, say, a subtle logic bug) creates doubts about release-engineering/QA practices, quite frankly. 

I should mention that there is a copy of libcroco.h in 
/usr/pkg/include/libcroco-0.6/

libcroco, so it looks like the search path for include files is not correct.

/Don Allen