+ Introduce a way for a user to set the default curses implementation

  used by packages that need curses.  From curses.buildlink3.mk:

  CURSES_DEFAULT
	This value represents the type of curses we wish to use on the
	system.  Setting this to "curses" means that the system curses
	implementation is fine.

	Possible: curses, ncurses, pdcurses

+ Move all code to detect a built-in version of curses into a
  curses.builtin.mk file.

+ Add code to {n,pd}curses/buildlink3.mk so make the headers and
  libraries usable as <curses.h> and -lcurses if _PKG_USE_CURSES is
  defined.  _PKG_USE_CURSES is only defined by curses.buildlink3.mk.

+ Improve the detection of native ncurses in ncurses/builtin.mk and
  allow headers and libraries to be usable as <ncurses.h> and -lncurses.

1 files changed, 71 insertions, 0 deletions

diff --git a/mk/curses.builtin.mk b/mk/curses.builtin.mk
new file mode 100644
index 00000000000..4b4fc2ff9c1
--- /dev/null
+++ b/mk/curses.builtin.mk
@@ -0,0 +1,71 @@
+# $NetBSD: curses.builtin.mk,v 1.1 2008/02/25 04:19:34 jlam Exp $
+
+BUILTIN_PKG:=	curses
+
+BUILTIN_FIND_LIBS:=		curses
+BUILTIN_FIND_FILES_VAR:=	H_CURSES
+BUILTIN_FIND_FILES.H_CURSES=	/usr/include/curses.h
+
+.include "buildlink3/bsd.builtin.mk"
+
+###
+### Determine if there is a built-in implementation of the package and
+### set IS_BUILTIN.<pkg> appropriately ("yes" or "no").
+###
+.if !defined(IS_BUILTIN.curses)
+IS_BUILTIN.curses=	no
+.  if empty(H_CURSES:M${LOCALBASE}/*) && exists(${H_CURSES})
+IS_BUILTIN.curses=	yes
+.  endif
+.endif
+MAKEVARS+=	IS_BUILTIN.curses
+
+###
+### Determine whether we should use the built-in implementation if it
+### exists, and set USE_BUILTIN.<pkg> appropriate ("yes" or "no").
+###
+.if !defined(USE_BUILTIN.curses)
+#
+# There will probably never be a devel/curses package because ncurses is
+# the recommended curses on many platforms, so we should always prefer the
+# native curses package.
+#
+PREFER.curses=		native
+.  if ${PREFER.curses} == "pkgsrc"
+USE_BUILTIN.curses=	no
+.  else
+USE_BUILTIN.curses=	${IS_BUILTIN.curses}
+.    if defined(BUILTIN_PKG.curses) && !empty(IS_BUILTIN.curses:M[yY][eE][sS])
+USE_BUILTIN.curses=	yes
+.      for _dep_ in ${BUILDLINK_API_DEPENDS.curses}
+.        if !empty(USE_BUILTIN.curses:M[yY][eE][sS])
+USE_BUILTIN.curses!=							\
+	if ${PKG_ADMIN} pmatch ${_dep_:Q} ${BUILTIN_PKG.curses:Q}; then	\
+		${ECHO} yes;						\
+	else								\
+		${ECHO} no;						\
+	fi
+.        endif
+.      endfor
+.    endif
+.  endif  # PREFER.curses
+.endif
+MAKEVARS+=	USE_BUILTIN.curses
+
+###
+### The section below only applies if we are not including this file
+### solely to determine whether a built-in implementation exists.
+###
+CHECK_BUILTIN.curses?=	no
+.if !empty(CHECK_BUILTIN.curses:M[nN][oO])
+
+.  if !empty(USE_BUILTIN.curses:M[yY][eE][sS])
+.    if exists(${H_CURSES})
+BUILDLINK_INCDIRS.curses?=	${H_CURSES:H:S/^${BUILDLINK_PREFIX.curses}\///}
+.    endif
+.    if !empty(BUILTIN_LIB_FOUND.curses:M[yY][eE][sS])
+BUILDLINK_LDADD.curses?=	-lcurses
+.    endif
+.  endif
+
+.endif	# CHECK_BUILTIN.curses