Problem building (wide) ncurses on Solaris because of _XOPEN_EXTENDED_SOURCES

[Jean-Pierre Flori]

Dea Thomas,

Here is another problem we encounter while building ncurses with wide
characters support on Solaris for the Sage project:
when required, -D_XOPEN_SOURCE_EXTENDED is passed to CPPFLAGS rather
than CFLAGS, and for this reason it is also passed to g++ which does
not need it, but also fails on Solaris.
A tentative fix is described at
https://bitbucket.org/lmnd/lmnd-prefix/src/5901f00d116284a75b9142d13f06ea60df568758/sys-libs/ncurses/ncurses-5.9-r02.1.ebuild?at=lmnd#cl-75

See http://trac.sagemath.org/ticket/15268#ticket for more details and
some error logs.
That link also describes a problem with ADA support, but it may be on
the old ADA compiler available on the test system side and not on
ncurses side.

Best and thanks again for the awesome support,

-- 
Jean-Pierre Flori