Issue in integrating the .lib file in visual studio code with GCC

[Aldrina_B]

Hi All,

I am facing an issue in adding a precompiled library of the format .lib to visual studio code with GCC, I added LDFLAGS to the makefile, but still it is showing the lib file cannot be found

Can anybody guide me , on the steps that needs to be done when linking a .lib file to the makefile.

Note : The .lib file was generated in Keil IDE.

[Jared]

Hey, 

That looks correct,

Can you share a screenshot of the sensor folder from file explorer? How does it look like?

regards

Jared

[Aldrina_B]

Hi Jared

Please find the screenshot of the sensor folder from the explorer.

[Aldrina_B]

/**** Start of the file *******/

PROJECT_NAME     := spi_pca10056

TARGETS          := nrf52840_xxaa

OUTPUT_DIRECTORY := _build

SDK_ROOT := ../../../../../..

PROJ_DIR := ../../..

$(OUTPUT_DIRECTORY)/nrf52840_xxaa.out: \

    LINKER_SCRIPT  := spi_gcc_nrf52.ld

# Source files common to all targets

SRC_FILES += \

    $(SDK_ROOT)/modules/nrfx/mdk/gcc_startup_nrf52840.S \

    $(SDK_ROOT)/components/libraries/log/src/nrf_log_backend_rtt.c \

    $(SDK_ROOT)/components/libraries/log/src/nrf_log_backend_serial.c \

    $(SDK_ROOT)/components/libraries/log/src/nrf_log_backend_uart.c \

    $(SDK_ROOT)/components/libraries/log/src/nrf_log_default_backends.c \

    $(SDK_ROOT)/components/libraries/log/src/nrf_log_frontend.c \

    $(SDK_ROOT)/components/libraries/log/src/nrf_log_str_formatter.c \

    $(SDK_ROOT)/components/boards/boards.c \

    $(SDK_ROOT)/components/libraries/button/app_button.c \

    $(SDK_ROOT)/components/libraries/util/app_error.c \

    $(SDK_ROOT)/components/libraries/util/app_error_handler_gcc.c \

    $(SDK_ROOT)/components/libraries/util/app_error_weak.c \

    $(SDK_ROOT)/components/libraries/scheduler/app_scheduler.c \

    $(SDK_ROOT)/components/libraries/timer/app_timer2.c \

    $(SDK_ROOT)/components/libraries/util/app_util_platform.c \

    $(SDK_ROOT)/components/libraries/timer/drv_rtc.c \

    $(SDK_ROOT)/components/libraries/util/nrf_assert.c \

    $(SDK_ROOT)/components/libraries/atomic_fifo/nrf_atfifo.c \

    $(SDK_ROOT)/components/libraries/atomic/nrf_atomic.c \

    $(SDK_ROOT)/components/libraries/balloc/nrf_balloc.c \

    $(SDK_ROOT)/external/fprintf/nrf_fprintf.c \

    $(SDK_ROOT)/external/fprintf/nrf_fprintf_format.c \

    $(SDK_ROOT)/components/libraries/memobj/nrf_memobj.c \

    $(SDK_ROOT)/components/libraries/ringbuf/nrf_ringbuf.c \

    $(SDK_ROOT)/components/libraries/sortlist/nrf_sortlist.c \

    $(SDK_ROOT)/components/libraries/strerror/nrf_strerror.c \

    $(SDK_ROOT)/integration/nrfx/legacy/nrf_drv_spi.c \

    $(SDK_ROOT)/integration/nrfx/legacy/nrf_drv_uart.c \

    $(SDK_ROOT)/modules/nrfx/soc/nrfx_atomic.c \

    $(SDK_ROOT)/modules/nrfx/drivers/src/nrfx_gpiote.c \

    $(SDK_ROOT)/modules/nrfx/drivers/src/prs/nrfx_prs.c \

    $(SDK_ROOT)/modules/nrfx/drivers/src/nrfx_spi.c \

    $(SDK_ROOT)/modules/nrfx/drivers/src/nrfx_spim.c \

    $(SDK_ROOT)/modules/nrfx/drivers/src/nrfx_uart.c \

    $(SDK_ROOT)/modules/nrfx/drivers/src/nrfx_uarte.c \

    $(SDK_ROOT)/components/libraries/bsp/bsp.c \

    $(PROJ_DIR)/main.c \

    $(SDK_ROOT)/external/segger_rtt/SEGGER_RTT.c \

    $(SDK_ROOT)/external/segger_rtt/SEGGER_RTT_Syscalls_GCC.c \

    $(SDK_ROOT)/external/segger_rtt/SEGGER_RTT_printf.c \

    $(SDK_ROOT)/modules/nrfx/mdk/system_nrf52840.c \

    $(SDK_ROOT)/examples/peripheral/spi/APP/hal/ftk_spi.c \

    $(SDK_ROOT)/examples/peripheral/spi/APP/hal/ftk_uart.c \

    $(SDK_ROOT)/examples/peripheral/spi/APP/sensor/sensorDriver.c \

    $(SDK_ROOT)/examples/peripheral/spi/APP/sensor/platform.c \

# Include folders common to all targets

INC_FOLDERS += \

    $(SDK_ROOT)/components \

    $(SDK_ROOT)/modules/nrfx/mdk \

    $(SDK_ROOT)/components/libraries/scheduler \

    $(PROJ_DIR) \

    $(SDK_ROOT)/components/libraries/timer \

    $(SDK_ROOT)/components/boards \

    $(SDK_ROOT)/components/libraries/strerror \

    $(SDK_ROOT)/components/toolchain/cmsis/include \

    $(SDK_ROOT)/components/libraries/util \

    ../config \

    $(SDK_ROOT)/components/libraries/balloc \

    $(SDK_ROOT)/components/libraries/ringbuf \

    $(SDK_ROOT)/modules/nrfx/hal \

    $(SDK_ROOT)/components/libraries/bsp \

    $(SDK_ROOT)/components/libraries/log \

    $(SDK_ROOT)/components/libraries/button \

    $(SDK_ROOT)/modules/nrfx \

    $(SDK_ROOT)/components/libraries/experimental_section_vars \

    $(SDK_ROOT)/integration/nrfx/legacy \

    $(SDK_ROOT)/components/libraries/delay \

    $(SDK_ROOT)/external/segger_rtt \

    $(SDK_ROOT)/components/libraries/atomic_fifo \

    $(SDK_ROOT)/components/drivers_nrf/nrf_soc_nosd \

    $(SDK_ROOT)/components/libraries/atomic \

    $(SDK_ROOT)/components/libraries/sortlist \

    $(SDK_ROOT)/components/libraries/memobj \

    $(SDK_ROOT)/integration/nrfx \

    $(SDK_ROOT)/modules/nrfx/drivers/include \

    $(SDK_ROOT)/external/fprintf \

    $(SDK_ROOT)/components/libraries/log/src \

    $(SDK_ROOT)/examples/peripheral/spi/APP/hal \

    $(SDK_ROOT)/examples/peripheral/spi/APP/sensor \

# Libraries common to all targets

LIB_FILES += \

# Optimization flags

OPT = -O3 -g3

# Uncomment the line below to enable link time optimization

#OPT += -flto

# C flags common to all targets

CFLAGS += $(OPT)

CFLAGS += -DAPP_TIMER_V2

CFLAGS += -DAPP_TIMER_V2_RTC1_ENABLED

CFLAGS += -DBOARD_PCA10056

CFLAGS += -DCONFIG_GPIO_AS_PINRESET

CFLAGS += -DFLOAT_ABI_HARD  

CFLAGS += -DNRF52840_XXAA

CFLAGS += -mcpu=cortex-m4

CFLAGS += -mthumb -mabi=aapcs

CFLAGS += -Wall -Werror

CFLAGS += -mfloat-abi=hard -mfpu=fpv4-sp-d16

# keep every function in a separate section, this allows linker to discard unused ones

CFLAGS += -ffunction-sections -fdata-sections -fno-strict-aliasing

CFLAGS += -fno-builtin -fshort-enums

# C++ flags common to all targets

CXXFLAGS += $(OPT)

# Assembler flags common to all targets

ASMFLAGS += -g3

ASMFLAGS += -mcpu=cortex-m4

ASMFLAGS += -mthumb -mabi=aapcs

ASMFLAGS += -mfloat-abi=hard -mfpu=fpv4-sp-d16

ASMFLAGS += -DAPP_TIMER_V2

ASMFLAGS += -DAPP_TIMER_V2_RTC1_ENABLED

ASMFLAGS += -DBOARD_PCA10056

ASMFLAGS += -DCONFIG_GPIO_AS_PINRESET

ASMFLAGS += -DFLOAT_ABI_HARD

ASMFLAGS += -DNRF52840_XXAA

# Linker flags

LDFLAGS += $(OPT)

LDFLAGS += -mthumb -mabi=aapcs -L$(SDK_ROOT)/modules/nrfx/mdk -T$(LINKER_SCRIPT)

#sensor Library

LDFLAGS += -L$(SDK_ROOT)/examples/peripheral/spi/APP/sensor -l986algo

LDFLAGS += -mcpu=cortex-m4

LDFLAGS += -mfloat-abi=hard -mfpu=fpv4-sp-d16

# let linker dump unused sections

LDFLAGS += -Wl,--gc-sections

# use newlib in nano version

LDFLAGS += --specs=nano.specs

nrf52840_xxaa: CFLAGS += -D__HEAP_SIZE=8192

nrf52840_xxaa: CFLAGS += -D__STACK_SIZE=8192

nrf52840_xxaa: ASMFLAGS += -D__HEAP_SIZE=8192

nrf52840_xxaa: ASMFLAGS += -D__STACK_SIZE=8192

# Add standard libraries at the very end of the linker input, after all objects

# that may need symbols provided by these libraries.

LIB_FILES += -lc -lnosys -lm

.PHONY: default help

# Default target - first one defined

default: nrf52840_xxaa

# Print all targets that can be built

help:

    @echo following targets are available:

    @echo       nrf52840_xxaa

    @echo       sdk_config - starting external tool for editing sdk_config.h

    @echo       flash      - flashing binary

TEMPLATE_PATH := $(SDK_ROOT)/components/toolchain/gcc

include $(TEMPLATE_PATH)/Makefile.common

$(foreach target, $(TARGETS), $(call define_target, $(target)))

.PHONY: flash erase

# Flash the program

flash: default

    @echo Flashing: $(OUTPUT_DIRECTORY)/nrf52840_xxaa.hex

    nrfjprog -f nrf52 --program $(OUTPUT_DIRECTORY)/nrf52840_xxaa.hex --sectorerase

    nrfjprog -f nrf52 --reset

erase:

    nrfjprog -f nrf52 --eraseall

SDK_CONFIG_FILE := ../config/sdk_config.h

CMSIS_CONFIG_TOOL := $(SDK_ROOT)/external_tools/cmsisconfig/CMSIS_Configuration_Wizard.jar

sdk_config:

    java -jar $(CMSIS_CONFIG_TOOL) $(SDK_CONFIG_FILE)

/**** End of the file *******/

I have added the required .c files and the folders to the makefile and also added LDFLAG to link the library. Let me know if any more changes needs to be made in the makefile or in any JSON files.

Thanks in Advance

   

[Aldrina_B]

Hi Jared,

I just tried to link the file using LIBFILES flag, but still I got an error. Can you help me figure this issue?

[Jared]

Hi,

It seems that the original issue has been resolved, and that it now finds the pre compiled lib,

You can try to add fshort-wchar as a CFLAG in the makefile:

CFLAGS += -fshort-wchar

regarsd

Jared 

[Aldrina_B]

Hi Jared, I tried adding the CFLAGS, but still the warning persists. Can anything else

be done?

[Jared]

Hi,

My understanding is that the precompiled lib from Keil has another default size for wchar_t then what is used with your GCC toolchain. Which is causing this issue. I therefore suggested to fix this by adding the CFLAG in my previous reply. I have to admit that I'm not that experienced in exactly this topic. Since it's a more general C question then Nordic specifically, do you mind trying to post this in an alternative forum? Also, is there any chance that you can change the pre compiled lib by adjusting the compilator rules in Keil? 

regards

Jared