Index: configure.ac
==================================================================
--- configure.ac
+++ configure.ac
@@ -175,10 +175,16 @@
 				;;
 			dnl Clang's assembler on Windows is not complete yet
 			dnl and cannot compile all .S files.
 			*-*-mingw*)
 				ASFLAGS="$ASFLAGS -no-integrated-as"
+				;;
+			dnl Clang generates assembly output on SPARC64 that
+			dnl OpenBSD's assembler does not accept.
+			sparc64-*-*openbsd*)
+				OBJCFLAGS="$OBJCFLAGS -integrated-as"
+				AC_SUBST(INTEGRATED_AS, "-integrated-as")
 				;;
 		esac
 		;;
 esac