Allow to override toolchain path (#45)

* Allow to override toolchain path

* abspath to provide correct TOOLS downstream

* ensure patch can patch again

* also abspath provided arg

Author: mcspr

Makefile.arduino

@@ -1,3 +1,4 @@
+PREFIX ?= ../../../xtensa-lx106-elf
 
 %:
 	for v6 in 0 1; do \
@@ -14,7 +15,7 @@
 			LWIP_LIB=liblwip$$((2+4*v6))-$$mss$$featname.a \
 			LWIP_LIB_RELEASE=../../lib/liblwip$$((2+4*v6))-$$mss$$featname.a \
 			LWIP_INCLUDES_RELEASE=../include \
-			TOOLS=../../../xtensa-lx106-elf/bin/xtensa-lx106-elf- \
+			TOOLS=$(abspath $(wildcard $(PREFIX)))/bin/xtensa-lx106-elf- \
 			TCP_MSS=$$mss LWIP_FEATURES=$$feat LWIP_IPV6=$$v6 \
 			BUILD=build-$$mss$$featname-v$$((4+2*v6)) \
 			$@ ; \

makefiles/Makefile.build-lwip2

@@ -52,7 +52,7 @@ $(LWIP_LIB):
 	make -f makefiles/Makefile.glue-esp BUILD=$(BUILD) V=$(V)
 	make -f makefiles/Makefile.glue target=$(target) BUILD=$(BUILD) TCP_MSS=$(TCP_MSS) LWIP_FEATURES=$(LWIP_FEATURES) LWIP_IPV6=$(LWIP_IPV6) V=$(V)
 ifeq ($(target),arduino)
-	make -C lwip2-src/src -f ../../makefiles/Makefile.lwip2 BUILD=../../$(BUILD) LWIP_LIB=../../$(LWIP_LIB) SDK=../../$(SDK) TOOLS=../../$(TOOLS) TCP_MSS=$(TCP_MSS) LWIP_FEATURES=$(LWIP_FEATURES) LWIP_IPV6=$(LWIP_IPV6) V=$(V)
+	make -C lwip2-src/src -f ../../makefiles/Makefile.lwip2 BUILD=../../$(BUILD) LWIP_LIB=../../$(LWIP_LIB) SDK=../../$(SDK) TCP_MSS=$(TCP_MSS) LWIP_FEATURES=$(LWIP_FEATURES) LWIP_IPV6=$(LWIP_IPV6) V=$(V)
 else
 	make -C lwip2-src/src -f ../../makefiles/Makefile.lwip2 BUILD=../../$(BUILD) LWIP_LIB=../../$(LWIP_LIB) TCP_MSS=$(TCP_MSS) LWIP_FEATURES=$(LWIP_FEATURES) LWIP_IPV6=$(LWIP_IPV6) V=$(V)
 endif
@@ -81,4 +81,4 @@ endif
 
 clean:
 	rm -rf $(BUILD) $(LWIP_LIB) $(AUTO)
-	cd lwip2-src; rm -f src/.patched src/core/*.c.orig src/core/ipv6/*.c.orig; git checkout -- src;
+	cd lwip2-src; git checkout -f -- src; git clean -f -- src;