| # | |
| # File: BuildEnvironment.mk | |
| # Copyright (c) 2019, Dornerworks Ltd. | |
| # | |
| BUILD_DIR = ./build | |
| CROSS_COMPILE_PREFIX = riscv32-unknown-elf | |
| SDK_DIR = ./freedom-e-sdk | |
| LINKER_SCRIPT = $(SDK_DIR)/env/freedom-e300-hifive1/flash.lds | |
| #----------------------------------------------------------- | |
| GCC = $(CROSS_COMPILE_PREFIX)-gcc | |
| OBJCOPY = $(CROSS_COMPILE_PREFIX)-objcopy | |
| OBJDUMP = $(CROSS_COMPILE_PREFIX)-objdump | |
| AR = $(CROSS_COMPILE_PREFIX)-ar | |
| RANLIB = $(CROSS_COMPILE_PREFIX)-ranlib | |
| GDB = $(CROSS_COMPILE_PREFIX)-gdb | |
| # if using the multi-arch (riscv64-unknown-elf-gcc): | |
| ARCH_FLAGS = -march=rv32imac -mabi=ilp32 -mcmodel=medany | |
| # Basic CFLAGS: | |
| CFLAGS = -Wall -Wextra -O0 -g3 -msmall-data-limit=8 -std=gnu11 | |
| CFLAGS += -ffunction-sections -fdata-sections -fno-builtin-printf | |
| CFLAGS += -DDONT_USE_PLIC -DDONT_USE_M_TIME | |
| CFLAGS += -include sys/cdefs.h | |
| CFLAGS += $(ARCH_FLAGS) | |
| # These flags are for outputing *.d dependency files for make | |
| CFLAGS += -MT"$@" -MMD -MP -MF"$(@:%.o=%.d)" -MT"$(@)" | |
| ASMFLAGS = -O0 -g3 | |
| ASMFLAGS += $(ARCH_FLAGS) | |
| ASMFLAGS += -DportasmHANDLE_INTERRUPT=handle_trap | |
| ASMFLAGS += -msmall-data-limit=8 | |
| ASMFLAGS += -ffunction-sections -fdata-sections | |
| ASMFLAGS += -x assembler-with-cpp | |
| ASMFLAGS += -MT"$@" -MMD -MP -MF"$(@:%.o=%.d)" -MT"$(@)" | |
| # Linker arguments __________________________________________ | |
| LDFLAGS := -Xlinker --gc-sections -Xlinker --defsym=__stack_size=1K | |
| LDFLAGS += -O0 -g3 | |
| LDFLAGS += -ffunction-sections -fdata-sections --specs=nano.specs | |
| LDFLAGS += -nostartfiles | |
| LDFLAGS += -T $(LINKER_SCRIPT) | |
| LDFLAGS += -L../ | |
| LDFLAGS += -Wl,--start-group -Wl,--end-group | |
| LDFLAGS += -Wl,--wrap=malloc -Wl,--wrap=free -Wl,--wrap=open -Wl,--wrap=lseek -Wl,--wrap=read -Wl,--wrap=write | |
| LDFLAGS += -Wl,--wrap=fstat -Wl,--wrap=stat -Wl,--wrap=close -Wl,--wrap=link -Wl,--wrap=unlink -Wl,--wrap=execve | |
| LDFLAGS += -Wl,--wrap=fork -Wl,--wrap=getpid -Wl,--wrap=kill -Wl,--wrap=wait -Wl,--wrap=isatty -Wl,--wrap=times | |
| LDFLAGS += -Wl,--wrap=sbrk -Wl,--wrap=_exit -Wl,--wrap=puts -Wl,--wrap=_malloc -Wl,--wrap=_free -Wl,--wrap=_open | |
| LDFLAGS += -Wl,--wrap=_lseek -Wl,--wrap=_read -Wl,--wrap=_write -Wl,--wrap=_fstat -Wl,--wrap=_stat -Wl,--wrap=_close | |
| LDFLAGS += -Wl,--wrap=_link -Wl,--wrap=_unlink -Wl,--wrap=_execve -Wl,--wrap=_fork -Wl,--wrap=_getpid -Wl,--wrap=_kill | |
| LDFLAGS += -Wl,--wrap=_wait -Wl,--wrap=_isatty -Wl,--wrap=_times -Wl,--wrap=_sbrk -Wl,--wrap=__exit -Wl,--wrap=_puts |