From 6bb235b676a62ac1abdd0d385f9a9599c206b3b6 Mon Sep 17 00:00:00 2001
From: Thomas Klaehn <thomas.klaehn@perinet.io>
Date: Sun, 29 Mar 2020 15:48:12 +0200
Subject: [PATCH] Build: Add c++ build ability.

---
 Makefile                          | 30 +++++++++++++++++++++++++-----
 config/build/nrf52/Makefile.nrf52 | 17 +++++++++++++++++
 2 files changed, 42 insertions(+), 5 deletions(-)

diff --git a/Makefile b/Makefile
index 3085516..8de653d 100644
--- a/Makefile
+++ b/Makefile
@@ -7,6 +7,7 @@ TARGET_FILE ?= $(APPLICATION).elf
 
 CC = $(CROSS_COMPILE)gcc
 CPP = $(CROSS_COMPILE)cpp
+CXX = $(CROSS_COMPILE)g++
 OBJCOPY = $(CROSS_COMPILE)objcopy
 SIZE = $(CROSS_COMPILE)size
 
@@ -19,8 +20,14 @@ CPP_FLAGS += $(addprefix -I, $(INCLUDES))
 C_SRCS = $(wildcard $(SRC_DIR)/*.c)
 C_SRCS += $(wildcard $(SRC_DIR)/platform/$(PLATFORM)/*.c)
 C_SRCS += $(wildcard $(SRC_DIR)/application/$(APPLICATION)/*.c)
-C_OBJS = $(patsubst $(SRC_DIR)%,$(OBJ_DIR)%,$(patsubst %.c,%.o,$(C_SRCS)))
-OBJS = $(NRF_A_OBJS) $(NRF_C_OBJS) $(C_OBJS)
+C_OBJS = $(patsubst $(SRC_DIR)%,$(OBJ_DIR)%,$(patsubst %.c,%.c.o,$(C_SRCS)))
+
+CC_SRCS = $(wildcard $(SRC_DIR)/*.cc)
+CC_SRCS += $(wildcard $(SRC_DIR)/platform/$(PLATFORM)/*.cc)
+CC_SRCS += $(wildcard $(SRC_DIR)/application/$(APPLICATION)/*.cc)
+CC_OBJS = $(patsubst $(SRC_DIR)%,$(OBJ_DIR)%,$(patsubst %.cc,%.cc.o,$(CC_SRCS)))
+
+OBJS = $(NRF_A_OBJS) $(NRF_C_OBJS) $(C_OBJS) $(CC_OBJS)
 
 TARGET = $(BIN_DIR)/$(TARGET_FILE)
 TARGET_HEX = $(patsubst %.elf,%.hex,$(TARGET))
@@ -36,6 +43,11 @@ C_FLAGS += -Wall -Werror
 C_FLAGS += -ffunction-sections -fdata-sections -fno-strict-aliasing
 C_FLAGS += -DPLATFORM_$(PLATFORM)
 
+CXX_FLAGS += -O$(OPT) -g$(OPT)
+CXX_FLAGS += -Wall -Werror
+CXX_FLAGS += -ffunction-sections -fdata-sections -fno-strict-aliasing
+CXX_FLAGS += -DPLATFORM_$(PLATFORM)
+
 LIBS += c nosys m
 
 include config/build/$(PLATFORM)/$(APPLICATION)/Makefile.$(APPLICATION)
@@ -44,7 +56,7 @@ include config/build/$(PLATFORM)/$(APPLICATION)/Makefile.$(APPLICATION)
 all: $(TARGET)
 
 debug:
-	@echo $(TARGET_HEX)
+	@echo $(CC_OBJS)
 
 clean:
 	rm -f $(TARGET) $(TARGET_HEX) $(TARGET_PACKAGE)
@@ -55,7 +67,7 @@ distclean:
 
 $(TARGET): $(OBJS) $(THIS_MAKEFILE)
 	@mkdir -p $(dir $@)
-	$(CC) $(CC_FLAGS) $(LD_FLAGS) $(OBJS) $(addprefix -l,$(LIBS)) -o $@
+	$(CXX) $(CXX_FLAGS) $(LD_FLAGS) $(OBJS) $(addprefix -l,$(LIBS)) -o $@
 	ln -sf $(shell pwd)/$@ $(shell pwd)/bin/firmware.elf
 	$(SIZE) -x $@
 
@@ -67,7 +79,15 @@ $(OBJ_DIR)/%.d: $(SRC_DIR)/%.c $(THIS_MAKEFILE)
 	@mkdir -p $(dir $@)
 	$(CPP) -MM -MF $@ -MP -MT $(patsubst %.d,%.o,$@) $(C_FLAGS) $(CPP_FLAGS) $(patsubst $(OBJ_DIR)/%.d,$(SRC_DIR)/%.c,$@)
 
-$(OBJ_DIR)/%.o: $(SRC_DIR)/%.c $(THIS_MAKEFILE)
+$(OBJ_DIR)/%.d: $(SRC_DIR)/%.cc $(THIS_MAKEFILE)
+	@mkdir -p $(dir $@)
+	$(CPP) -MM -MF $@ -MP -MT $(patsubst %.d,%.o,$@) $(CXX_FLAGS) $(CPP_FLAGS) $(patsubst $(OBJ_DIR)/%.d,$(SRC_DIR)/%.cc,$@)
+
+$(OBJ_DIR)/%.cc.o: $(SRC_DIR)/%.cc $(THIS_MAKEFILE)
+	@mkdir -p $(dir $@)
+	$(CXX) -c $(CPP_FLAGS) $(CXX_FLAGS) $< -o $@
+
+$(OBJ_DIR)/%.c.o: $(SRC_DIR)/%.c $(THIS_MAKEFILE)
 	@mkdir -p $(dir $@)
 	$(CC) -c $(CPP_FLAGS) $(C_FLAGS) $< -o $@
 
diff --git a/config/build/nrf52/Makefile.nrf52 b/config/build/nrf52/Makefile.nrf52
index c4f82bf..20d28b6 100644
--- a/config/build/nrf52/Makefile.nrf52
+++ b/config/build/nrf52/Makefile.nrf52
@@ -23,6 +23,23 @@ C_FLAGS += -fno-builtin -fshort-enums
 C_FLAGS += -D__HEAP_SIZE=8192
 C_FLAGS += -D__HEAP_SIZE=8192
 
+CXX_FLAGS += -DBOARD_PCA10040
+CXX_FLAGS += -DBSP_DEFINES_ONLY
+CXX_FLAGS += -DCONFIG_GPIO_AS_PINRESET
+CXX_FLAGS += -DFLOAT_ABI_HARD
+CXX_FLAGS += -DNRF52
+CXX_FLAGS += -DNRF52832_XXAA
+CXX_FLAGS += -DNRF52_PAN_74
+CXX_FLAGS += -DNRF_SD_BLE_API_VERSION=7
+CXX_FLAGS += -DS132
+CXX_FLAGS += -DSOFTDEVICE_PRESENT
+CXX_FLAGS += -mcpu=$(CPU)
+CXX_FLAGS += -mthumb -mabi=aapcs
+CXX_FLAGS += -mfloat-abi=hard -mfpu=fpv4-sp-d16
+CXX_FLAGS += -fno-builtin -fshort-enums
+CXX_FLAGS += -D__HEAP_SIZE=8192
+CXX_FLAGS += -D__HEAP_SIZE=8192
+
 # Assembler flags common to all targets
 A_FLAGS += -g$(OPT)
 A_FLAGS += -mcpu=$(CPU)