Unbreak WITHOUT_LIBPHREAD/WITHOUT_LIBC_R option support, depending

on platform.

Makefile

@@ -6,7 +6,12 @@ SUBDIR=	${_ggatec} \
 	${_ggated} \
 	ggatel
 
-.if ${MK_LIBPTHREAD} != "no"
+.if ${MACHINE_ARCH} == "alpha" || ${MACHINE_ARCH} == "sparc64"
+.if ${MK_LIBC_R} != "no"
+_ggatec=	ggatec
+_ggated=	ggated
+.endif
+.elif ${MK_LIBPTHREAD} != "no"
 _ggatec=	ggatec
 _ggated=	ggated
 .endif