Discuss here different C compiler set ups, and compiling executables for the ESP8266

User avatar
By Andrei Candale
#16382
jcmvbkbc wrote:Ok, is that file compiled at all?
Can you add V=1 to your make command and share the full build log?


make output:
Code: Select all/home/andrei/workspace/licenta/toolchain/espressif_sdk/esp8266/esp-open-sdk/xtensa-lx106-elf/bin/xtensa-lx106-elf-gcc -L/home/andrei/workspace/licenta/toolchain/espressif_sdk/esp8266/esp-open-sdk/sdk/lib -T/home/andrei/workspace/licenta/toolchain/espressif_sdk/esp8266/esp-open-sdk/sdk/ld/eagle.app.v6.ld -nostdlib -Wl,--no-check-sections -u call_user_start -Wl,-static -Wl,--start-group -lc -lgcc -lhal -lpp -lphy -lnet80211 -llwip -lwpa -lmain build/user_main.c_app.a -Wl,--end-group -o build/user_main.c.out
/home/andrei/workspace/licenta/toolchain/espressif_sdk/esp8266/esp-open-sdk/sdk/lib/libmain.a(app_main.o): In function `user_uart_wait_tx_fifo_empty':
(.irom0.text+0x3e4): undefined reference to `user_init'
/home/andrei/workspace/licenta/toolchain/espressif_sdk/esp8266/esp-open-sdk/sdk/lib/libmain.a(app_main.o): In function `user_uart_wait_tx_fifo_empty':
(.irom0.text+0x57e): undefined reference to `user_init'
collect2: error: ld returned 1 exit status
make: *** [build/user_main.c.out] Error 1


And here is my Makefile
Code: Select all# Makefile for ESP8266 projects
#
# Thanks to:
# - zarya
# - Jeroen Domburg (Sprite_tm)
# - Christian Klippel (mamalala)
# - Tommie Gannert (tommie)
#
# Changelog:
# - 2014-10-06: Changed the variables to include the header file directory
# - 2014-10-06: Added global var for the Xtensa tool root
# - 2014-11-23: Updated for SDK 0.9.3
# - 2014-12-25: Replaced esptool by esptool.py

# Output directors to store intermediate compiled files
# relative to the project directory
BUILD_BASE  = build
FW_BASE     = firmware

# base directory for the compiler
XTENSA_TOOLS_ROOT ?= /home/andrei/workspace/licenta/toolchain/espressif_sdk/esp8266/esp-open-sdk/xtensa-lx106-elf/bin

# base directory of the ESP8266 SDK package, absolute
SDK_BASE    ?= /home/andrei/workspace/licenta/toolchain/espressif_sdk/esp8266/esp-open-sdk/sdk

# esptool.py path and port
ESPTOOL     ?= esptool.py
ESPPORT     ?= /dev/ttyUSB0

# name for the target project
TARGET      = user_main.c

# which modules (subdirectories) of the project to include in compiling
# MODULES     = driver user
# EXTRA_INCDIR    = include

# libraries used in this project, mainly provided by the SDK
LIBS        = c gcc hal pp phy net80211 lwip wpa main

# compiler flags using during compilation of source files
CFLAGS      = -Os -g -O2 -Wpointer-arith -Wundef -Werror -Wl,-EL -fno-inline-functions -nostdlib -mlongcalls -mtext-section-literals  -D__ets__ -DICACHE_FLASH

# linker flags used to generate the main object file
LDFLAGS     = -nostdlib -Wl,--no-check-sections -u call_user_start -Wl,-static

# linker script used for the above linkier step
LD_SCRIPT   = eagle.app.v6.ld

# various paths from the SDK used in this project
SDK_LIBDIR  = lib
SDK_LDDIR   = ld
SDK_INCDIR  = include include/json

# we create two different files for uploading into the flash
# these are the names and options to generate them
FW_FILE_1_ADDR  = 0x00000
FW_FILE_2_ADDR  = 0x40000

# select which tools to use as compiler, librarian and linker
CC      := $(XTENSA_TOOLS_ROOT)/xtensa-lx106-elf-gcc
AR      := $(XTENSA_TOOLS_ROOT)/xtensa-lx106-elf-ar
LD      := $(XTENSA_TOOLS_ROOT)/xtensa-lx106-elf-gcc



####
#### no user configurable options below here
####
SRC_DIR     := $(MODULES)
BUILD_DIR   := $(addprefix $(BUILD_BASE)/,$(MODULES))

SDK_LIBDIR  := $(addprefix $(SDK_BASE)/,$(SDK_LIBDIR))
SDK_INCDIR  := $(addprefix -I$(SDK_BASE)/,$(SDK_INCDIR))

SRC     := $(foreach sdir,$(SRC_DIR),$(wildcard $(sdir)/*.c))
OBJ     := $(patsubst %.c,$(BUILD_BASE)/%.o,$(SRC))
LIBS        := $(addprefix -l,$(LIBS))
APP_AR      := $(addprefix $(BUILD_BASE)/,$(TARGET)_app.a)
TARGET_OUT  := $(addprefix $(BUILD_BASE)/,$(TARGET).out)

LD_SCRIPT   := $(addprefix -T$(SDK_BASE)/$(SDK_LDDIR)/,$(LD_SCRIPT))

INCDIR  := $(addprefix -I,$(SRC_DIR))
EXTRA_INCDIR    := $(addprefix -I,$(EXTRA_INCDIR))
MODULE_INCDIR   := $(addsuffix /include,$(INCDIR))

FW_FILE_1   := $(addprefix $(FW_BASE)/,$(FW_FILE_1_ADDR).bin)
FW_FILE_2   := $(addprefix $(FW_BASE)/,$(FW_FILE_2_ADDR).bin)

V ?= $(VERBOSE)
ifeq ("$(V)","1")
Q :=
vecho := @true
else
Q := @
vecho := @echo
endif

vpath %.c $(SRC_DIR)

define compile-objects
$1/%.o: %.c
   $(vecho) "CC $$<"
   $(Q) $(CC) $(INCDIR) $(MODULE_INCDIR) $(EXTRA_INCDIR) $(SDK_INCDIR) $(CFLAGS) -c $$< -o $$@
endef

.PHONY: all checkdirs flash clean

all: checkdirs $(TARGET_OUT) $(FW_FILE_1) $(FW_FILE_2)

$(FW_BASE)/%.bin: $(TARGET_OUT) | $(FW_BASE)
   $(vecho) "FW $(FW_BASE)/"
   $(Q) $(ESPTOOL) elf2image -o $(FW_BASE)/ $(TARGET_OUT)

$(TARGET_OUT): $(APP_AR)
   $(vecho) "LD $@"
   $(Q) $(LD) -L$(SDK_LIBDIR) $(LD_SCRIPT) $(LDFLAGS) -Wl,--start-group $(LIBS) $(APP_AR) -Wl,--end-group -o $@

$(APP_AR): $(OBJ)
   $(vecho) "AR $@"
   $(Q) $(AR) cru $@ $^

checkdirs: $(BUILD_DIR) $(FW_BASE)

$(BUILD_DIR):
   $(Q) mkdir -p $@

$(FW_BASE):
   $(Q) mkdir -p $@

flash: $(FW_FILE_1) $(FW_FILE_2)
   $(ESPTOOL) --port $(ESPPORT) write_flash $(FW_FILE_1_ADDR) $(FW_FILE_1) $(FW_FILE_2_ADDR) $(FW_FILE_2)

clean:
   $(Q) rm -rf $(FW_BASE) $(BUILD_BASE)

$(foreach bdir,$(BUILD_DIR),$(eval $(call compile-objects,$(bdir))))
User avatar
By jcmvbkbc
#16384
Andrei Candale wrote:make output:
Code: Select all/home/andrei/workspace/licenta/toolchain/espressif_sdk/esp8266/esp-open-sdk/xtensa-lx106-elf/bin/xtensa-lx106-elf-gcc -L/home/andrei/workspace/licenta/toolchain/espressif_sdk/esp8266/esp-open-sdk/sdk/lib -T/home/andrei/workspace/licenta/toolchain/espressif_sdk/esp8266/esp-open-sdk/sdk/ld/eagle.app.v6.ld -nostdlib -Wl,--no-check-sections -u call_user_start -Wl,-static -Wl,--start-group -lc -lgcc -lhal -lpp -lphy -lnet80211 -llwip -lwpa -lmain build/user_main.c_app.a -Wl,--end-group -o build/user_main.c.out
/home/andrei/workspace/licenta/toolchain/espressif_sdk/esp8266/esp-open-sdk/sdk/lib/libmain.a(app_main.o): In function `user_uart_wait_tx_fifo_empty':
(.irom0.text+0x3e4): undefined reference to `user_init'
/home/andrei/workspace/licenta/toolchain/espressif_sdk/esp8266/esp-open-sdk/sdk/lib/libmain.a(app_main.o): In function `user_uart_wait_tx_fifo_empty':
(.irom0.text+0x57e): undefined reference to `user_init'
collect2: error: ld returned 1 exit status
make: *** [build/user_main.c.out] Error 1


It's only the linking step. Please run make clean and share the full build log.
User avatar
By Andrei Candale
#16387
jcmvbkbc wrote:It's only the linking step. Please run make clean and share the full build log.


Here is what I've done.
Code: Select all➜  sdk  make clean
➜  sdk  make V=1
mkdir -p firmware
/home/andrei/workspace/licenta/toolchain/espressif_sdk/esp8266/esp-open-sdk/xtensa-lx106-elf/bin/xtensa-lx106-elf-ar cru build/user_main.c_app.a
/home/andrei/workspace/licenta/toolchain/espressif_sdk/esp8266/esp-open-sdk/xtensa-lx106-elf/bin/xtensa-lx106-elf-ar: build/user_main.c_app.a: No such file or directory
make: *** [build/user_main.c_app.a] Error 1
➜  sdk  mkdir build
➜  sdk  make V=1
/home/andrei/workspace/licenta/toolchain/espressif_sdk/esp8266/esp-open-sdk/xtensa-lx106-elf/bin/xtensa-lx106-elf-ar cru build/user_main.c_app.a
/home/andrei/workspace/licenta/toolchain/espressif_sdk/esp8266/esp-open-sdk/xtensa-lx106-elf/bin/xtensa-lx106-elf-gcc -L/home/andrei/workspace/licenta/toolchain/espressif_sdk/esp8266/esp-open-sdk/sdk/lib -T/home/andrei/workspace/licenta/toolchain/espressif_sdk/esp8266/esp-open-sdk/sdk/ld/eagle.app.v6.ld -nostdlib -Wl,--no-check-sections -u call_user_start -Wl,-static -Wl,--start-group -lc -lgcc -lhal -lpp -lphy -lnet80211 -llwip -lwpa -lmain build/user_main.c_app.a -Wl,--end-group -o build/user_main.c.out
/home/andrei/workspace/licenta/toolchain/espressif_sdk/esp8266/esp-open-sdk/sdk/lib/libmain.a(app_main.o): In function `user_uart_wait_tx_fifo_empty':
(.irom0.text+0x3e4): undefined reference to `user_init'
/home/andrei/workspace/licenta/toolchain/espressif_sdk/esp8266/esp-open-sdk/sdk/lib/libmain.a(app_main.o): In function `user_uart_wait_tx_fifo_empty':
(.irom0.text+0x57e): undefined reference to `user_init'
collect2: error: ld returned 1 exit status
make: *** [build/user_main.c.out] Error 1
➜  sdk  ls
build  firmware  Makefile  user


I'm not sure I'm doing it correctly; I'm not very familiar with make.