Add a use to handle gperf dependency

It uses gperf from base if it exists and its version is 3.x.x
Otherwise it uses gperf from ports

1 files changed, 35 insertions, 0 deletions

diff --git a/Mk/Uses/gperf.mk b/Mk/Uses/gperf.mk
new file mode 100644
index 000000000000..5f8a478c0e8b
--- /dev/null
+++ b/Mk/Uses/gperf.mk
@@ -0,0 +1,35 @@
+# $FreeBSD$
+#
+# handle dependency on gperf
+#
+# Feature:	gperf
+# Usage:	USES=gperf
+#
+# Take no arguments
+
+.if !defined(_INCLUDE_USES_GPERG_MK)
+_INCLUDE_USES_GPERF_MK=	yes
+
+.if !exists(/usr/bin/gperf)
+BUILD_DEPENDS+=	${LOCALBASE}/bin/gperf:${PORTSDIR}/devel/gperf
+GPERF=	${LOCALBASE}/bin/gperf
+.else
+_GPERF_VERSION!=	/usr/bin/gperf --version | head -1 || true
+_GPERF_MAJ_VERSION=	${_GPERF_VERSION:M[0-9].[0-9].[0-9]:C/.*([0-9]).[0-9].[0-9].*/\1/g}
+
+.if empty(_GPERF_MAJ_VERSION)
+_GPERF_MAJ_VERSION=	0
+.endif
+
+.if ${_GPERF_MAJ_VERSION} < 3
+BUILD_DEPENDS+=	${LOCALBASE}/bin/gperf:${PORTSDIR}/devel/gperf
+GPERF=	${LOCALBASE}/bin/gperf
+.else
+GPERF=	/usr/bin/gperf
+.endif
+.endif
+
+CONFIGURE_ENV+=	GPERF=${GPERF}
+MAKE_ENV+=	GPERF=${GPERF}
+
+.endif