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armds no link with c lib cfg failed( __use_no_semihosting)

WatterCutter

with assembly declear:

#ifdef STANDALONE
#define USE_SERIAL_PORT 1
asm(".global __use_no_semihosting");
#endif

to exclude any c clib being linked to output file

but i get the error info as follows:

Error: L6915E: Library reports error: __use_no_semihosting was requested, but _sys_command_string was referenced.

the question is, target is aarch64 cortex-a53,

no choice for me to link micro lib

what should I do?

  • +1 Arm Employee Badge

    Hi

    My name is Stephen and I work at Arm.

    The error message
    Error: L6915E: Library reports error: __use_no_semihosting was requested, but _sys_command_string was referenced.
    is saying you requested no semihosting functions may be linked-in from the C libraries, but _sys_command_string (which uses semihosting) was referenced.

    You will need to either add your own retargeted version of _sys_command_string into retarget.c, or remove the use of argv and argc to pass parameters to main().  See:

    developer.arm.com/.../-sys-command-string--

    Hope this helps

    Stephen

  • 0 in reply to Stephen Theobald

    with the case you recommend,

    i add some folder to extend its func,

    and modified the makefile in the top folder,

    before:

    APP_C_SRC := $(wildcard $(SRC_DIR)/*.c) \
    APP_S_SRC := $(wildcard $(ASM_DIR)/*.S)
    OBJ_FILES := $(APP_C_SRC:$(SRC_DIR)/%.c=$(OBJ_DIR)/%.o) \
    $(APP_S_SRC:$(ASM_DIR)/%.S=$(OBJ_DIR)/%.o)
    DEP_FILES := $(OBJ_FILES:%=%.d)

    after:

    APP_C_SRC := $(wildcard $(SRC_DIR)/*.c) \

                           $(wildcard $(SRC_DIR)/dirx/*.c) 
    APP_S_SRC := $(wildcard $(ASM_DIR)/*.S)
    OBJ_FILES := $(APP_C_SRC:$(SRC_DIR)/%.c=$(OBJ_DIR)/%.o) \

                           $(APP_C_SRC:$(SRC_DIR)/dirx/%.c=$(OBJ_DIR)/%.o)
    $(APP_S_SRC:$(ASM_DIR)/%.S=$(OBJ_DIR)/%.o)
    DEP_FILES := $(OBJ_FILES:%=%.d)

    but it seemed to be not useful,

    the compile output is the same:

    12:25:54 **** Build of configuration Default for project startup_Armv8-Ax1_AC6_lab' ****
    make all
    mkdir obj
    Compiling src/GICv3_gicd.c...
    Compiling src/timer_interrupts.c...
    Compiling src/sp804_timer.c...
    Compiling src/main.c...
    Compiling src/GICv3_gicr.c...
    Compiling src/uart.c...
    Compiling src/retarget.c...
    Compiling asm/vectors.S...
    Compiling asm/v8_aarch64.S...
    Compiling asm/v8_utils.S...
    Compiling asm/startup.S...
    Linking startup_Armv8-Ax1_AC6.axf
    Done.

    12:25:56 Build Finished. 0 errors, 0 warnings. (took 2s.237ms)

    no new fiels related information anyway

  • 0 in reply to WatterCutter

    with the case you recommend,

    i add some folder to extend its func,

    and modified the makefile in the top folder,

    before:

    APP_C_SRC := $(wildcard $(SRC_DIR)/*.c) \
    APP_S_SRC := $(wildcard $(ASM_DIR)/*.S)
    OBJ_FILES := $(APP_C_SRC:$(SRC_DIR)/%.c=$(OBJ_DIR)/%.o) \
    $(APP_S_SRC:$(ASM_DIR)/%.S=$(OBJ_DIR)/%.o)
    DEP_FILES := $(OBJ_FILES:%=%.d)

    after:

    APP_C_SRC := $(wildcard $(SRC_DIR)/*.c) \

                           $(wildcard $(SRC_DIR)/dirx/*.c) 
    APP_S_SRC := $(wildcard $(ASM_DIR)/*.S)
    OBJ_FILES := $(APP_C_SRC:$(SRC_DIR)/%.c=$(OBJ_DIR)/%.o) \

                           $(APP_C_SRC:$(SRC_DIR)/dirx/%.c=$(OBJ_DIR)/%.o)
    $(APP_S_SRC:$(ASM_DIR)/%.S=$(OBJ_DIR)/%.o)
    DEP_FILES := $(OBJ_FILES:%=%.d)

    but it seemed to be not useful,

    the compile output is the same:

    12:25:54 **** Build of configuration Default for project startup_Armv8-Ax1_AC6_lab' ****
    make all
    mkdir obj
    Compiling src/GICv3_gicd.c...
    Compiling src/timer_interrupts.c...
    Compiling src/sp804_timer.c...
    Compiling src/main.c...
    Compiling src/GICv3_gicr.c...
    Compiling src/uart.c...
    Compiling src/retarget.c...
    Compiling asm/vectors.S...
    Compiling asm/v8_aarch64.S...
    Compiling asm/v8_utils.S...
    Compiling asm/startup.S...
    Linking startup_Armv8-Ax1_AC6.axf
    Done.

    12:25:56 Build Finished. 0 errors, 0 warnings. (took 2s.237ms)

    no new fiels related information anyway

    is there anything i missed?

  • 0 Arm Employee Badge in reply to WatterCutter

    Hi again

    Try this instead.  Into both makefiles for startup_Armv8-Ax1_AC6 and startup_Cortex-A53x1_AC6 add:

    APP_C_SRC := $(wildcard $(SRC_DIR)/*.c)
    EXT_C_SRC := $(wildcard $(SRC_DIR)/dirx/*.c)
    APP_S_SRC := $(wildcard $(ASM_DIR)/*.S)
    OBJ_FILES := $(APP_C_SRC:$(SRC_DIR)/%.c=$(OBJ_DIR)/%.o) \
                 $(EXT_C_SRC:$(SRC_DIR)/dirx/%.c=$(OBJ_DIR)/%.o) \
                 $(APP_S_SRC:$(ASM_DIR)/%.S=$(OBJ_DIR)/%.o)
    DEP_FILES := $(OBJ_FILES:%=%.d)

    and later add a compilation rule for the new folder, for startup_Armv8-Ax1_AC6:

    $(OBJ_DIR)/%.o : $(SRC_DIR)/dirx/%.c | $(OBJ_DIR)
        $(PROGRESS)
        $(QUIET) $(CC) -c $(TARGET_ARCH) $(CPPFLAGS) $(CFLAGS) -o $@ $<

    and (slightly different) for startup_Cortex-A53x1_AC6:

    $(OBJ_DIR)/%.o : $(SRC_DIR)/dirx/%.c | $(OBJ_DIR)
        $(PROGRESS)
        $(QUIET) $(CC) -c $(TARGET_CPU) $(CPPFLAGS) $(CFLAGS) -o $@ $<

    Hope this helps

    Stephen