--- ./hdparm-9.45.ebuild.orig	2014-10-02 10:44:59.000000000 +0200
+++ ./hdparm-9.45.ebuild.orig	2014-10-28 19:58:42.650764873 +0100
@@ -21,6 +21,11 @@ 
 		-e "/^CFLAGS/ s:-O2:${CFLAGS}:" \
 		-e "/^LDFLAGS/ s:-s:${LDFLAGS}:" \
 		Makefile || die "sed"
+	
+	# clang does not know about this gcc parameter
+	if [[ "tc-getCC()" == "clang" ]] ; then
+		sed -i -e "/^CFLAGS/ s:-fkeep-inline-functions::" Makefile || die "sed clang failed"
+	fi
 }
 
 src_compile() {