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Demo/RISC-V_RV32_QEMU_VIRT_GCC: Add option to build with picolibc

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When built with PICOLIBC=1, selects picolibc as the C library, uses
semihosting to display messages and uses picolibc stdio for output.

Signed-off-by: Keith Packard <keithpac@amazon.com>
This commit is contained in:
Keith Packard 2023-03-02 11:48:13 -08:00 • committed by Paul Bartell
parent bc1a95e9e7
commit 84ad9250da
1 changed files with 16 additions and 2 deletions
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18
FreeRTOS/Demo/RISC-V_RV32_QEMU_VIRT_GCC/build/gcc/Makefile
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@ -11,11 +11,22 @@ MAKE = make
CFLAGS += $(INCLUDE_DIRS) -DportasmHANDLE_INTERRUPT=handle_trap -fmessage-length=0 \
-march=rv32imac_zicsr -mabi=ilp32 -mcmodel=medlow -ffunction-sections -fdata-sections \
--specs=nano.specs -fno-builtin-printf -Wno-unused-parameter -nostartfiles -g3 -Os
-Wno-unused-parameter -nostartfiles -g3 -Os
ifeq ($(PICOLIBC),1)
CFLAGS += --specs=picolibc.specs -DPICOLIBC_INTEGER_PRINTF_SCANF
else
CFLAGS += --specs=nano.specs -fno-builtin-printf
endif
LDFLAGS += -nostartfiles -Xlinker --gc-sections -Wl,-Map,$(OUTPUT_DIR)/RTOSDemo.map \
-T./fake_rom.ld -march=rv32imac -mabi=ilp32 -mcmodel=medlow -Xlinker \
--defsym=__stack_size=350 -Wl,--start-group -Wl,--end-group -Wl,--wrap=malloc \
--defsym=__stack_size=350 -Wl,--start-group -Wl,--end-group
ifeq ($(PICOLIBC),1)
LDFLAGS += --specs=picolibc.specs --oslib=semihost --crt0=minimal -DPICOLIBC_INTEGER_PRINTF_SCANF
else
LDFLAGS += -Wl,--wrap=malloc \
-Wl,--wrap=free -Wl,--wrap=open -Wl,--wrap=lseek -Wl,--wrap=read -Wl,--wrap=write \
-Wl,--wrap=fstat -Wl,--wrap=stat -Wl,--wrap=close -Wl,--wrap=link -Wl,--wrap=unlink \
-Wl,--wrap=execve -Wl,--wrap=fork -Wl,--wrap=getpid -Wl,--wrap=kill -Wl,--wrap=wait \
@ -24,6 +35,7 @@ LDFLAGS += -nostartfiles -Xlinker --gc-sections -Wl,-Map,$(OUTPUT_DIR)/RTOSDemo.
-Wl,--wrap=_fstat -Wl,--wrap=_stat -Wl,--wrap=_close -Wl,--wrap=_link -Wl,--wrap=_unlink \
-Wl,--wrap=_execve -Wl,--wrap=_fork -Wl,--wrap=_getpid -Wl,--wrap=_kill -Wl,--wrap=_wait \
-Wl,--wrap=_isatty -Wl,--wrap=_times -Wl,--wrap=_sbrk -Wl,--wrap=__exit -Wl,--wrap=_puts
endif
# -Wl,--wrap=_exit
#
@ -92,7 +104,9 @@ SOURCE_FILES += (DEMO_PROJECT)/main_full.c
SOURCE_FILES += (DEMO_PROJECT)/ns16550.c
SOURCE_FILES += (DEMO_PROJECT)/riscv-virt.c
# Lightweight print formatting to use in place of the heavier GCC equivalent.
ifneq ($(PICOLIBC),1)
SOURCE_FILES += ./printf-stdarg.c
endif
ASM_SOURCE_FILES += ./start.S
ASM_SOURCE_FILES += ./RegTest.S
ASM_SOURCE_FILES += ./vector.S