py/mkrules.mk: Don't pass COPT to linker.

pfalcon · pfalcon · commit 645045a799ba · 2015-12-10T00:49:25.000+02:00
Oftentimes, libc, libm, etc. don't come compiled with CPU compressed code
option (Thumb, MIPS16, etc.), but we may still want to use such compressed
code for MicroPython itself.
diff --git a/py/mkrules.mk b/py/mkrules.mk
@@ -81,7 +81,9 @@ all: $(PROG)
 
 $(PROG): $(OBJ)
 	$(ECHO) "LINK $@"
-	$(Q)$(CC) $(COPT) -o $@ $^ $(LIB) $(LDFLAGS)
+# Do not pass COPT here - it's *C* compiler optimizations. For example,
+# we may want to compile using Thumb, but link with non-Thumb libc.
+	$(Q)$(CC) -o $@ $^ $(LIB) $(LDFLAGS)
 ifndef DEBUG
 	$(Q)$(STRIP) $(STRIPFLAGS_EXTRA) $(PROG)
 endif
