hcxdumptool: add GPIO support just in case (RPI only)

net-wireless/hcxdumptool/hcxdumptool-4.2.0.ebuild

@@ -5,15 +5,15 @@ EAPI=6
 
 inherit eutils
 
-DESCRIPTION="This is a sample skeleton ebuild file"
-HOMEPAGE="https://foo.example.org/"
+DESCRIPTION="Small tool to capture packets from wlan devices"
+HOMEPAGE="https://github.com/ZerBea/hcxdumptool"
 MY_COMMIT="ebfcdf0243604d36dfac2757d4373bd9331b8a9a"
 SRC_URI="https://github.com/ZerBea/hcxdumptool/archive/${MY_COMMIT}.zip -> ${P}.zip"
 
 LICENSE=""
 SLOT="0"
 KEYWORDS="~amd64"
-IUSE=""
+IUSE="gpio"
 
 DEPEND=""
 RDEPEND="${DEPEND}"
@@ -25,6 +25,14 @@ src_prepare(){
 	eapply_user
 }
 
-src_install(){
-	emake DESTDIR="${ED}" PREFIX="${EPREFIX}/usr" install
+src_configure(){
+	local GPIOSUPPORT
+	if use gpio; then
+		GPIOSUPPORT="GPIOSUPPORT=on"
+	fi
+	emake ${GPIOSUPPORT}
+}
+
+src_install(){
+	emake ${GPIOSUPPORT} DESTDIR="${ED}" PREFIX="${EPREFIX}/usr" install
 }