NetBSD has these functions in libc since 5.0 at least, librfuncs

installs an empty library here. Allow to filter it out, to avoid
the overhead.

1 files changed, 44 insertions, 0 deletions

diff --git a/devel/librfuncs/builtin.mk b/devel/librfuncs/builtin.mk
new file mode 100644
index 00000000000..4438b89b7b1
--- /dev/null
+++ b/devel/librfuncs/builtin.mk
@@ -0,0 +1,44 @@
+# $NetBSD: builtin.mk,v 1.1 2010/08/09 10:49:28 drochner Exp $
+
+BUILTIN_PKG:=	librfuncs
+.include "../../mk/buildlink3/bsd.builtin.mk"
+
+###
+### Determine if there is a built-in implementation of the package and
+### set IS_BUILTIN.<pkg> appropriately ("yes" or "no").
+###
+.include "../../mk/bsd.fast.prefs.mk"
+# NetBSD-5 and later has all these functions in libc
+# other OSes: append your patterns here
+_RFUNCS_IN_LIBC= NetBSD-[5-9].*-*
+.for _pl in ${_RFUNCS_IN_LIBC}
+.  if !empty(MACHINE_PLATFORM:M${_pl})
+IS_BUILTIN.librfuncs=	yes
+.  endif
+.endfor
+IS_BUILTIN.librfuncs?=	no
+MAKEVARS+=	IS_BUILTIN.librfuncs
+
+###
+### 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.librfuncs)
+.  if ${PREFER.librfuncs} == "pkgsrc"
+USE_BUILTIN.librfuncs=	no
+.  else
+USE_BUILTIN.librfuncs=	${IS_BUILTIN.librfuncs}
+.  endif
+.endif
+MAKEVARS+=	USE_BUILTIN.librfuncs
+
+###
+### The section below only applies if we are not including this file
+### solely to determine whether a built-in implementation exists.
+###
+CHECK_BUILTIN.librfuncs?=	no
+.if !empty(CHECK_BUILTIN.librfuncs:M[nN][oO])
+.  if !empty(USE_BUILTIN.librfuncs:M[yY][eE][sS])
+BUILDLINK_TRANSFORM+=		rm:-lrfuncs
+.  endif
+.endif	# CHECK_BUILTIN.librfuncs