Add helloworld sample.

samples/helloworld/Makefile

@@ -0,0 +1,62 @@
+.SUFFIXES:
+
+ifeq ($(strip $(WUT_ROOT)),)
+$(error "Please ensure WUT_ROOT is in your environment.")
+endif
+
+include $(WUT_ROOT)/rules/rpl.mk
+
+TARGET   := $(notdir $(CURDIR))
+BUILD    := build
+SOURCE   := src
+INCLUDE  := include
+DATA     := data
+LIBS     := -lcoreinit
+
+CFLAGS	 += -O2 -Wall -std=c11
+CXXFLAGS += -O2 -Wall
+LDFLAGS  += -lcoreinit -lgx2
+
+ifneq ($(BUILD),$(notdir $(CURDIR)))
+
+export OUTPUT   := $(CURDIR)/$(TARGET)
+export VPATH    := $(foreach dir,$(SOURCE),$(CURDIR)/$(dir)) \
+                   $(foreach dir,$(DATA),$(CURDIR)/$(dir))
+export BUILDDIR := $(CURDIR)/$(BUILD)
+export DEPSDIR  := $(BUILDDIR)
+
+CFILES    := $(foreach dir,$(SOURCE),$(notdir $(wildcard $(dir)/*.c)))
+CXXFILES  := $(foreach dir,$(SOURCE),$(notdir $(wildcard $(dir)/*.cpp)))
+SFILES    := $(foreach dir,$(SOURCE),$(notdir $(wildcard $(dir)/*.S)))
+
+ifeq ($(strip $(CXXFILES)),)
+export LD := $(CC)
+else
+export LD := $(CXX)
+endif
+
+export OFILES := $(CFILES:.c=.o) \
+                 $(CXXFILES:.cpp=.o) \
+                 $(SFILES:.S=.o)
+export INCLUDES := $(foreach dir,$(INCLUDE),-I$(CURDIR)/$(dir)) \
+                   -I$(CURDIR)/$(BUILD)
+
+.PHONY: $(BUILD) clean pkg run
+
+$(BUILD):
+	@[ -d $@ ] || mkdir -p $@
+	@$(MAKE) --no-print-directory -C $(BUILD) -f $(CURDIR)/Makefile
+
+clean:
+	@echo "[RM]  $(notdir $(OUTPUT))"
+	@rm -rf $(BUILD) $(OUTPUT).elf $(OUTPUT).rpx $(OUTPUT).a
+
+else
+
+DEPENDS	:= $(OFILES:.o=.d)
+
+$(OUTPUT).elf: $(OFILES)
+
+-include $(DEPENDS)
+
+endif

samples/helloworld/src/main.c

@@ -0,0 +1,9 @@
+#include <coreinit_debug.h>
+#include <gx2_init.h>
+
+int main(int argc, char **argv)
+{
+	GX2Init();
+	OSFatal("my first rpx");
+	return 0;
+}