Add a way to cleanly handle terminfo.db file used by devel/ncurses

This database contains compiled terminfo entries and is merged from
a large part which comes with ncurses themselves and compiled
.terminfo files installed by other ports (currently only rxvt-unicode
and jfbterm)

- Now the database is always kept up to date, regardless of port
  installation order (both ncurses installed before .terminfo files
  and the other way around work as expected)
- All affected ports now support clean deinstallation and do not
  produce stage-qa errors
- Affected ports are simplified, as they now only need to define
  USES=terminfo
- rxvt-unicode no longer pulls in ncurses: the dependency is not
  really needed for anything beside updating it's own database
- The patch contains Q/A test to check whether a port needs, or
  needs not USES=terminfo

Approved by:	portmgr (mat, bapt)
Differential Revision:	D3747

1 files changed, 3 insertions, 0 deletions

diff --git a/Mk/bsd.port.mk b/Mk/bsd.port.mk
index da50034a4526..8e41cce41721 100644
--- a/Mk/bsd.port.mk
+++ b/Mk/bsd.port.mk
@@ -1539,6 +1539,9 @@ QA_ENV+=		USESLIBTOOL=yes
 .if !empty(USES:Mshared-mime-info)
 QA_ENV+=		USESSHAREDMIMEINFO=yes
 .endif
+.if !empty(USES:Mterminfo)
+QA_ENV+=		USESTERMINFO=yes
+.endif
 
 CO_ENV+=		STAGEDIR=${STAGEDIR} \
 				PREFIX=${PREFIX} \