ESP-IDF V4.0, "undefined reference to" when working with multiple src files inside main
Posted: Thu Feb 20, 2020 1:45 pm
Hi,
I'm facing a problem when I try to compile an existing project which I'm basically trying to readapt to work with the new version of ESP-IDF V4.0 (the previous one was V3.3).
I noticed that the new development environment uses CMake in order to get the app running so, maybe my "inexperience" is the problem.
When I submit idf.py build flash I get these compilation errors:
app_main.cpp
Unfortunately, I can't provide many details about the code in question, but basically I have this structure inside of main:
- CMakeLists.h
- components
- main
-- app_config.cpp
-- app_config.h
-- app_housekeeping.cpp
-- app_housekeeping.h
-- app_commands.cpp
-- app_commands.h
-- app_main.cpp
-- CMakeLists.txt
-- component.mk
CMakeLists.txt outside "main":
CMakeLists.txt inside "main":
Since the problem is at the very beginning of app_main.cpp (right when I call the external functions and classes) I do believe that the problem could be potentially related to CMakeLists.txt that isn't "seeing" those other files inside of main.
Some help would be very appreciated. Thank you in advance
I'm facing a problem when I try to compile an existing project which I'm basically trying to readapt to work with the new version of ESP-IDF V4.0 (the previous one was V3.3).
I noticed that the new development environment uses CMake in order to get the app running so, maybe my "inexperience" is the problem.
When I submit idf.py build flash I get these compilation errors:
app_main.cpp
Code: Select all
FAILED: app.elf
cmd.exe /C "cd . && C:\Users\leofa\.espressif\tools\xtensa-esp32-elf\esp-2019r2-8.2.0\xtensa-esp32-elf\bin\xtensa-esp32-elf-g++.exe --sysroot=c:\development\esp/../xtensa-esp32-elf/xtensa-esp32-elf -mlongcalls -Wno-frame-address -nostdlib @CMakeFiles\app.elf.rsp -o app.elf && cd ."
c:/users/leofa/.espressif/tools/xtensa-esp32-elf/esp-2019r2-8.2.0/xtensa-esp32-elf/bin/../lib/gcc/xtensa-esp32-elf/8.2.0/../../../../xtensa-esp32-elf/bin/ld.exe: esp-idf/main/libmain.a(app_main.cpp.obj):(.literal.app_main+0xc): undefined reference to `MyConfig'
c:/users/leofa/.espressif/tools/xtensa-esp32-elf/esp-2019r2-8.2.0/xtensa-esp32-elf/bin/../lib/gcc/xtensa-esp32-elf/8.2.0/../../../../xtensa-esp32-elf/bin/ld.exe: esp-idf/main/libmain.a(app_main.cpp.obj):(.literal.app_main+0x14): undefined reference to `MyCommandApp'
c:/users/leofa/.espressif/tools/xtensa-esp32-elf/esp-2019r2-8.2.0/xtensa-esp32-elf/bin/../lib/gcc/xtensa-esp32-elf/8.2.0/../../../../xtensa-esp32-elf/bin/ld.exe: esp-idf/main/libmain.a(app_main.cpp.obj):(.literal.app_main+0x24): undefined reference to `AddTaskToMap(void*)'
c:/users/leofa/.espressif/tools/xtensa-esp32-elf/esp-2019r2-8.2.0/xtensa-esp32-elf/bin/../lib/gcc/xtensa-esp32-elf/8.2.0/../../../../xtensa-esp32-elf/bin/ld.exe: esp-idf/main/libmain.a(app_main.cpp.obj):(.literal.app_main+0x28): undefined reference to `AppConfig::mount()'
c:/users/leofa/.espressif/tools/xtensa-esp32-elf/esp-2019r2-8.2.0/xtensa-esp32-elf/bin/../lib/gcc/xtensa-esp32-elf/8.2.0/../../../../xtensa-esp32-elf/bin/ld.exe: esp-idf/main/libmain.a(app_main.cpp.obj):(.literal.app_main+0x2c): undefined reference to `AppCommandApp::ConfigureLogging()'
c:/users/leofa/.espressif/tools/xtensa-esp32-elf/esp-2019r2-8.2.0/xtensa-esp32-elf/bin/../lib/gcc/xtensa-esp32-elf/8.2.0/../../../../xtensa-esp32-elf/bin/ld.exe: esp-idf/main/libmain.a(app_main.cpp.obj):(.literal.app_main+0x30): undefined reference to `Housekeeping::Housekeeping()'
c:/users/leofa/.espressif/tools/xtensa-esp32-elf/esp-2019r2-8.2.0/xtensa-esp32-elf/bin/../lib/gcc/xtensa-esp32-elf/8.2.0/../../../../xtensa-esp32-elf/bin/ld.exe: esp-idf/main/libmain.a(app_main.cpp.obj): in function `app_main':
C:\development\app\build/../main/app_main.cpp:56: undefined reference to `AddTaskToMap(void*)'
c:/users/leofa/.espressif/tools/xtensa-esp32-elf/esp-2019r2-8.2.0/xtensa-esp32-elf/bin/../lib/gcc/xtensa-esp32-elf/8.2.0/../../../../xtensa-esp32-elf/bin/ld.exe: C:\development\app\build/../main/app_main.cpp:59: undefined reference to `AppConfig::mount()'
c:/users/leofa/.espressif/tools/xtensa-esp32-elf/esp-2019r2-8.2.0/xtensa-esp32-elf/bin/../lib/gcc/xtensa-esp32-elf/8.2.0/../../../../xtensa-esp32-elf/bin/ld.exe: C:\development\app\build/../main/app_main.cpp:62: undefined reference to `AppCommandApp::ConfigureLogging()'
c:/users/leofa/.espressif/tools/xtensa-esp32-elf/esp-2019r2-8.2.0/xtensa-esp32-elf/bin/../lib/gcc/xtensa-esp32-elf/8.2.0/../../../../xtensa-esp32-elf/bin/ld.exe: C:\development\app\build/../main/app_main.cpp:68: undefined reference to `Housekeeping::Housekeeping()'
collect2.exe: error: ld returned 1 exit status
ninja: build stopped: subcommand failed.
- CMakeLists.h
- components
- main
-- app_config.cpp
-- app_config.h
-- app_housekeeping.cpp
-- app_housekeeping.h
-- app_commands.cpp
-- app_commands.h
-- app_main.cpp
-- CMakeLists.txt
-- component.mk
CMakeLists.txt outside "main":
Code: Select all
cmake_minimum_required(VERSION 3.5)
set(CMAKE_EXPORT_COMPILE_COMMANDS 1)
set(MDF_VER command bash -c "cd $ENV{MDF_PATH} && git describe --always --tags --dirty")
#CPPFLAGS := -D MDF_VER=\"$(MDF_VER)\"
set(EXTRA_COMPONENT_DIRS $ENV{MDF_PATH}/components $ENV{MDF_PATH}/components/third_party)
#set(EXTRA_COMPONENT_DIRS ${EXTRA_COMPONENT_DIRS} )
message(STATUS "EXTRA_COMPONENT_DIRS: ${EXTRA_COMPONENT_DIRS}")
set(CMAKE_SYSROOT $ENV{IDF_PATH}/../xtensa-esp32-elf/xtensa-esp32-elf)
include($ENV{IDF_PATH}/tools/cmake/project.cmake)
project(app)
Code: Select all
idf_component_register(SRCS "app_main.cpp"
INCLUDE_DIRS ".")Some help would be very appreciated. Thank you in advance
