Init repo with basic BG framebuffer renderer

1 files changed, 79 insertions, 0 deletions

diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..1dd6375
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,79 @@
+.POSIX:
+.SUFFIXES:
+
+# Path to the development kit (devkitARM) and the GBA library.
+DEVKITPRO   := /opt/devkitpro
+DEVKITBIN   := $(DEVKITPRO)/devkitARM/bin
+DEVKITTOOLS := $(DEVKITPRO)/tools/bin
+LIBGBA_DIR  := $(DEVKITPRO)/libgba
+LIBGBA_SRC  := $(DEVKITPRO)/libgba/include/
+LIBGBA      := $(LIBGBA_DIR)/lib/libgba.a
+LIBGBA      += $(LIBGBA_DIR)/lib/libfat.a
+LIBGBA      += $(LIBGBA_DIR)/lib/libmm.a
+
+# Source code location and files to watch for changes.
+SRC_DIR     := src
+BUILD_DIR   := build
+SRC_MAIN    := $(SRC_DIR)/main.c
+ASM_FILES   := $(wildcard $(SRC_DIR)/*.s)
+WATCH_SRC   := $(shell find $(SRC_DIR) -name *.c -or -name *.s -or -name *.h)
+INC_DIRS    := $(shell find $(SRC_DIR) -type d)
+INC_DIRS    += $(BUILD_DIR)
+INC_FLAGS   := $(addprefix -I,$(INC_DIRS))
+INC_FLAGS   += -I$(LIBGBA_SRC)
+
+# Output library names and executables.
+TARGET         := sequencer
+ELF            := $(BUILD_DIR)/$(TARGET).elf
+BIN            := $(BUILD_DIR)/$(TARGET).gba
+
+# Compiler and linker configuration.
+CC             := $(DEVKITBIN)/arm-none-eabi-gcc
+OBJCOPY        := $(DEVKITBIN)/arm-none-eabi-objcopy
+ARCH           := -mthumb -mthumb-interwork
+SPECS          := -specs=gba.specs
+CONFIG         :=
+CFLAGS         := -Wall -Wextra -pedantic -Wno-incompatible-pointer-types
+CFLAGS         += -fno-strict-aliasing
+CFLAGS         += -mcpu=arm7tdmi -mtune=arm7tdmi $(ARCH)
+CFLAGS         += $(INC_FLAGS)
+CFLAGS         += $(CONFIG)
+LDFLAGS        := $(ARCH) $(SPECS)
+LDLIBS         := $(LIBGBA)
+RELEASE_CFLAGS := -DNDEBUG -O3
+DEBUG_CFLAGS   := -DDEBUG -O2 -g
+
+.PHONY: clean run
+
+# Setup debug/release builds.
+#     make clean && make <target> DEBUG=0
+#     make clean && make <target> DEBUG=1
+DEBUG ?= 0
+ifeq ($(DEBUG), 1)
+    CFLAGS += $(DEBUG_CFLAGS)
+else
+    CFLAGS += $(RELEASE_CFLAGS)
+endif
+
+main: $(BUILD_DIR) $(BIN)
+
+# Strip and fix header to create final .gba file.
+$(BIN): $(ELF)
+        $(OBJCOPY) -v -O binary $(ELF) $(BIN)
+        $(DEVKITTOOLS)/gbafix $(BIN)
+
+# Link files.
+$(ELF): $(SRC_MAIN) $(WATCH_SRC)
+        $(CC) $(CFLAGS) $(LDFLAGS) -o $(ELF) $(SRC_MAIN) $(ASM_FILES) $(LDLIBS)
+
+# Create build directory if needed.
+$(BUILD_DIR):
+        mkdir -p $(BUILD_DIR)
+
+# Test the output .gba in an emulator.
+run: main
+        mgba-qt $(BIN)
+
+# Remove build directory.
+clean:
+        rm -rf $(BUILD_DIR)