Changed RIOT/Makefile.include, Makefile.base, Makefile.cflags, and native/Makefile.include to compile C and C++ files.

Author: Pham Huu Dang Nhat

Makefile.base

@@ -30,8 +30,19 @@ ASMOBJ += $(ASSMSRC:%.S=$(BINDIR)$(MODULE)/%.o)
 ifeq ($(strip $(SRC)),)
 	SRC = $(wildcard *.c)
 endif
-OBJ = $(SRC:%.c=$(BINDIR)$(MODULE)/%.o)
+
+ifeq ($(strip $(SRCXX)),)
+	SRCXX = $(wildcard *.cpp)
+endif
+
+OBJC = $(SRC:%.c=$(BINDIR)$(MODULE)/%.o)
+OBJCXX = $(SRCXX:%.cpp=$(BINDIR)$(MODULE)/%.o)
+
+OBJ = $(OBJC)
+OBJ += $(OBJCXX)
+
 DEP = $(SRC:%.c=$(BINDIR)$(MODULE)/%.d)
+DEP += $(SRCXX:%.cpp=$(BINDIR)$(MODULE)/%.d)
 
 $(BINDIR)$(MODULE).a: $(OBJ) $(ASMOBJ) ${DIRS:%=ALL--%}
 	@mkdir -p $(BINDIR)$(MODULE)
@@ -46,6 +57,10 @@ $(BINDIR)$(MODULE)/%.o: %.c
 	@mkdir -p $(BINDIR)$(MODULE)
 	$(AD)$(CC) $(CFLAGS) $(INCLUDES) -MD -MP -c -o $(BINDIR)$(MODULE)/$*.o $(abspath $*.c)
 
+$(BINDIR)$(MODULE)/%.o: %.cpp
+	@mkdir -p $(BINDIR)$(MODULE)
+	$(AD)$(CXX) $(filter-out $(CXXUWFLAGS), $(CFLAGS)) $(CXXEXFLAGS) $(INCLUDES) -MD -MP -c -o $(BINDIR)$(MODULE)/$*.o $(abspath $*.cpp)
+
 $(BINDIR)$(MODULE)/%.o: %.s
 	@mkdir -p $(BINDIR)$(MODULE)
 	$(AD)$(AS) $(ASFLAGS) $*.s -o $(BINDIR)$(MODULE)/$*.o

Makefile.cflags

@@ -29,3 +29,6 @@ ifeq ($(shell $(CC) -Wstrict-prototypes -Werror=strict-prototypes -Wold-style-de
 # duplicated parameters don't hurt
 CFLAGS += -Wstrict-prototypes -Werror=strict-prototypes -Wold-style-definition -Werror=old-style-definition
 endif
+
+# Unwanted flags for c++
+CXXUWFLAGS += -std=gnu99 -std=c99 -Wstrict-prototypes -Wold-style-definition

Makefile.include

@@ -90,14 +90,19 @@ BASELIBS += $(USEPKG:%=${BINDIR}%.a)
 export ELFFILE ?= $(BINDIR)$(APPLICATION).elf
 export HEXFILE ?= $(ELFFILE:.elf=.hex)
 
+# variables used to complie and link c++
+export CPPMIX ?= $(if $(wildcard *.cpp),1,)
+export CXXUWFLAGS
+export CXXEXFLAGS
+
 ## make script for your application. Build RIOT-base here!
 all: ..build-message $(USEPKG:%=${BINDIR}%.a) $(APPDEPS)
 	$(AD)DIRS="$(DIRS)" "$(MAKE)" -C $(CURDIR) -f $(RIOTBASE)/Makefile.application
 ifeq (,$(RIOTNOLINK))
 ifeq ($(BUILDOSXNATIVE),1)
-	$(AD)$(LINK) $(UNDEF) -o $(ELFFILE) $(BASELIBS) $(LINKFLAGS) -Wl,-no_pie
+	$(AD)$(if $(CPPMIX),$(CXX),$(LINK)) $(UNDEF) -o $(ELFFILE) $(BASELIBS) $(LINKFLAGS) -Wl,-no_pie
 else
-	$(AD)$(LINK) $(UNDEF) -o $(ELFFILE) -Wl,--start-group $(BASELIBS) -lm -Wl,--end-group  -Wl,-Map=$(BINDIR)$(APPLICATION).map $(LINKFLAGS)
+	$(AD)$(if $(CPPMIX),$(CXX),$(LINK)) $(UNDEF) -o $(ELFFILE) -Wl,--start-group $(BASELIBS) -lm -Wl,--end-group  -Wl,-Map=$(BINDIR)$(APPLICATION).map $(LINKFLAGS)
 endif
 	$(AD)$(SIZE) $(ELFFILE)
 	$(AD)$(OBJCOPY) $(OFLAGS) $(ELFFILE) $(HEXFILE)

boards/native/Makefile.include

@@ -10,6 +10,7 @@ export ELF = $(BINDIR)$(APPLICATION).elf
 # toolchain:
 export PREFIX =
 export CC ?= $(PREFIX)gcc
+export CXX ?= $(PREFIX)g++
 export AR ?= $(PREFIX)ar
 export AS ?= $(PREFIX)as
 export LINK ?= $(PREFIX)gcc
@@ -31,6 +32,10 @@ export CFLAGS += -DCOMPAT_32BIT -L/usr/lib32 -B/usr/lib32
 endif
 endif
 
+# unwanted (CXXUWFLAGS) and extra (CXXEXFLAGS) flags for c++
+export CXXUWFLAGS +=
+export CXXEXFLAGS +=
+
 export LINKFLAGS += -m32
 ifeq ($(shell uname -s),FreeBSD)
 ifeq ($(shell uname -m),amd64)