--- procmail-3.22-r10.ebuild.orig	2015-01-10 20:55:45.741238398 +0100
+++ procmail-3.22-r10.ebuild	2015-01-10 20:53:58.325867496 +0100
@@ -65,7 +65,11 @@
 	# -finline-functions (implied by -O3) leaves strstr() in an infinite loop.
 	# To work around this, we append -fno-inline-functions to CFLAGS
 	# Since GCC 4.7 we also need -fno-ipa-cp-clone (bug #466552)
-	append-flags -fno-inline-functions -fno-ipa-cp-clone
+	# If it's clang, ignore -fno-ipa-cp-clone, as clang doesn't support this
+	case "$(tc-getCC)" in
+		"clang") append-flags -fno-inline-functions;;
+		"gcc"|*) append-flags -fno-inline-functions -fno-ipa-cp-clone;;
+	esac
 
 	sed -e "s:CFLAGS0 = -O:CFLAGS0 = ${CFLAGS}:" \
 		-e "s:LDFLAGS0= -s:LDFLAGS0 = ${LDFLAGS}:" \