Enable CONFIG_TCP_NO_OPTIMIZE; simplify build dirs

Add -DCONFIG_TCP_NO_OPTIMIZE to firmware-template-gd32/Rules.mk to disable TCP optimizations. In firmware-template-gd32/lib/Rules.mk introduce BUILD_DIRS_ALL (including EXTRA_C_BUILD_DIRS, EXTRA_CPP_BUILD_DIRS and lib_gd32) and replace multiple conditional mkdir calls with a single mkdir -p $(BUILD_DIRS_ALL) to simplify and harden build directory creation.

Author: vanvught

firmware-template-gd32/Rules.mk

@@ -53,6 +53,7 @@ LIBDEP=$(addprefix ../lib-,$(LIBS))
 DEFINES+=-DHTTPD_CONTENT_SIZE=2048
 DEFINES+=-DTCP_MAX_TCBS_ALLOWED=10
 DEFINES+=-DCONFIG_NETWORK_MEMORY_BLOCKS=12
+DEFINES+=-DCONFIG_TCP_NO_OPTIMIZE
 
 COPS=-DGD32 -D$(FAMILY_UCA) -D$(LINE_UC) -D$(MCU) -D$(BOARD) -DPHY_TYPE=$(ENET_PHY)
 COPS+=$(strip $(DEFINES) $(MAKE_FLAGS) $(INCLUDES) $(LIBINCDIRS))

firmware-template-gd32/lib/Rules.mk

@@ -78,11 +78,10 @@ all : builddirs $(TARGET)
 
 .PHONY: clean builddirs
 
+BUILD_DIRS_ALL := $(BUILD_DIRS) $(EXTRA_C_BUILD_DIRS) $(EXTRA_CPP_BUILD_DIRS) lib_gd32
+
 builddirs:
-	mkdir -p $(BUILD_DIRS) 
-	if [[ -n "${EXTRA_C_BUILD_DIRS}" ]]; then mkdir -p $(EXTRA_C_BUILD_DIRS); fi
-	if [[ -n "${EXTRA_CPP_BUILD_DIRS}" ]]; then mkdir -p $(EXTRA_CPP_BUILD_DIRS); fi
-	mkdir -p lib_gd32
+	mkdir -p $(BUILD_DIRS_ALL)
 
 clean:
 	rm -rf build_gd32