2 CROSS_COMPILE_PREFIX = riscv32-unknown-elf
\r
4 SDK_DIR = ./freedom-e-sdk
\r
6 LINKER_SCRIPT = $(SDK_DIR)/env/freedom-e300-hifive1/flash.lds
\r
7 #-----------------------------------------------------------
\r
8 GCC = $(CROSS_COMPILE_PREFIX)-gcc
\r
9 OBJCOPY = $(CROSS_COMPILE_PREFIX)-objcopy
\r
10 OBJDUMP = $(CROSS_COMPILE_PREFIX)-objdump
\r
11 AR = $(CROSS_COMPILE_PREFIX)-ar
\r
12 RANLIB = $(CROSS_COMPILE_PREFIX)-ranlib
\r
13 GDB = $(CROSS_COMPILE_PREFIX)-gdb
\r
15 # if using the multi-arch (riscv64-unknown-elf-gcc):
\r
16 ARCH_FLAGS = -march=rv32imac -mabi=ilp32 -mcmodel=medany
\r
18 CFLAGS = -Wall -Wextra -O0 -g3 -msmall-data-limit=8 -std=gnu11
\r
19 CFLAGS += -ffunction-sections -fdata-sections -fno-builtin-printf
\r
20 CFLAGS += -DDONT_USE_PLIC -DDONT_USE_M_TIME
\r
21 CFLAGS += -include sys/cdefs.h
\r
22 CFLAGS += $(ARCH_FLAGS)
\r
23 # These flags are for outputing *.d dependency files for make
\r
24 CFLAGS += -MT"$@" -MMD -MP -MF"$(@:%.o=%.d)" -MT"$(@)"
\r
27 ASMFLAGS += $(ARCH_FLAGS)
\r
28 ASMFLAGS += -DportasmHANDLE_INTERRUPT=handle_trap
\r
29 ASMFLAGS += -msmall-data-limit=8
\r
30 ASMFLAGS += -ffunction-sections -fdata-sections
\r
31 ASMFLAGS += -x assembler-with-cpp
\r
32 ASMFLAGS += -MT"$@" -MMD -MP -MF"$(@:%.o=%.d)" -MT"$(@)"
\r
34 # Linker arguments __________________________________________
\r
35 LDFLAGS := -Xlinker --gc-sections -Xlinker --defsym=__stack_size=1K
\r
37 LDFLAGS += -ffunction-sections -fdata-sections --specs=nano.specs
\r
38 LDFLAGS += -nostartfiles
\r
39 LDFLAGS += -T $(LINKER_SCRIPT)
\r
41 LDFLAGS += -Wl,--start-group -Wl,--end-group
\r
42 LDFLAGS += -Wl,--wrap=malloc -Wl,--wrap=free -Wl,--wrap=open -Wl,--wrap=lseek -Wl,--wrap=read -Wl,--wrap=write
\r
43 LDFLAGS += -Wl,--wrap=fstat -Wl,--wrap=stat -Wl,--wrap=close -Wl,--wrap=link -Wl,--wrap=unlink -Wl,--wrap=execve
\r
44 LDFLAGS += -Wl,--wrap=fork -Wl,--wrap=getpid -Wl,--wrap=kill -Wl,--wrap=wait -Wl,--wrap=isatty -Wl,--wrap=times
\r
45 LDFLAGS += -Wl,--wrap=sbrk -Wl,--wrap=_exit -Wl,--wrap=puts -Wl,--wrap=_malloc -Wl,--wrap=_free -Wl,--wrap=_open
\r
46 LDFLAGS += -Wl,--wrap=_lseek -Wl,--wrap=_read -Wl,--wrap=_write -Wl,--wrap=_fstat -Wl,--wrap=_stat -Wl,--wrap=_close
\r
47 LDFLAGS += -Wl,--wrap=_link -Wl,--wrap=_unlink -Wl,--wrap=_execve -Wl,--wrap=_fork -Wl,--wrap=_getpid -Wl,--wrap=_kill
\r
48 LDFLAGS += -Wl,--wrap=_wait -Wl,--wrap=_isatty -Wl,--wrap=_times -Wl,--wrap=_sbrk -Wl,--wrap=__exit -Wl,--wrap=_puts
\r