Compilation Errors while Building PPPoS Client Library with Latest Espressif32 Version 6.4.0

noushukalathil7 · December 12, 2023, 10:26am

Hello all,

I am currently facing challenges while attempting to build the PPPoS client library with the latest Espressif32 version 6.4.0. Below, I have outlined the platform and environment setup

Platform and Environment Configuration:

[env:esp32dev]
platform = espressif32
board = esp32dev
board_build.partitions = min_spiffs.csv
framework = arduino
monitor_speed = 115200
lib_deps =
   lib/PPPOSClient
build_flags =
	-DCONFIG_LWIP_PPP_SUPPORT=1
	-DCONFIG_LWIP_PPP_CHAP_SUPPORT=1

Error log :

c:/users/noush/.platformio/packages/toolchain-xtensa-esp32/bin/../lib/gcc/xtensa-esp32-elf/8.4.0/../../../../xtensa-esp32-elf/bin/ld.exe: .pio/build/esp32dev/libfe7/libPPPOSClient.a(PPPOS.c.o):(.literal.pppos_client_task+0xc): undefined reference to `pppos_input_tcpip'
c:/users/noush/.platformio/packages/toolchain-xtensa-esp32/bin/../lib/gcc/xtensa-esp32-elf/8.4.0/../../../../xtensa-esp32-elf/bin/ld.exe: .pio/build/esp32dev/libfe7/libPPPOSClient.a(PPPOS.c.o):(.literal.PPPOS_start+0x10): undefined reference to `pppapi_set_default'
c:/users/noush/.platformio/packages/toolchain-xtensa-esp32/bin/../lib/gcc/xtensa-esp32-elf/8.4.0/../../../../xtensa-esp32-elf/bin/ld.exe: .pio/build/esp32dev/libfe7/libPPPOSClient.a(PPPOS.c.o):(.literal.PPPOS_start+0x14): undefined reference to `pppapi_set_auth'
c:/users/noush/.platformio/packages/toolchain-xtensa-esp32/bin/../lib/gcc/xtensa-esp32-elf/8.4.0/../../../../xtensa-esp32-elf/bin/ld.exe: .pio/build/esp32dev/libfe7/libPPPOSClient.a(PPPOS.c.o):(.literal.PPPOS_start+0x18): undefined reference to `pppapi_connect'
c:/users/noush/.platformio/packages/toolchain-xtensa-esp32/bin/../lib/gcc/xtensa-esp32-elf/8.4.0/../../../../xtensa-esp32-elf/bin/ld.exe: .pio/build/esp32dev/libfe7/libPPPOSClient.a(PPPOS.c.o):(.literal.PPPOS_start+0x1c): undefined reference to `pppapi_pppos_create'
c:/users/noush/.platformio/packages/toolchain-xtensa-esp32/bin/../lib/gcc/xtensa-esp32-elf/8.4.0/../../../../xtensa-esp32-elf/bin/ld.exe: .pio/build/esp32dev/libfe7/libPPPOSClient.a(PPPOS.c.o):(.literal.PPPOS_stop+0x0): undefined reference to `pppapi_close'
c:/users/noush/.platformio/packages/toolchain-xtensa-esp32/bin/../lib/gcc/xtensa-esp32-elf/8.4.0/../../../../xtensa-esp32-elf/bin/ld.exe: .pio/build/esp32dev/libfe7/libPPPOSClient.a(PPPOS.c.o):(.literal.PPPOS_stop+0x8): undefined reference to `pppapi_free'
c:/users/noush/.platformio/packages/toolchain-xtensa-esp32/bin/../lib/gcc/xtensa-esp32-elf/8.4.0/../../../../xtensa-esp32-elf/bin/ld.exe: .pio/build/esp32dev/libfe7/libPPPOSClient.a(PPPOS.c.o): in function `pppos_client_task':
C:\Users\noush\OneDrive\Documents\PlatformIO\Projects\bolt_esp32_ocpp_V4/lib/PPPOSClient/src/PPPOS.c:171: undefined reference to `pppos_input_tcpip'
c:/users/noush/.platformio/packages/toolchain-xtensa-esp32/bin/../lib/gcc/xtensa-esp32-elf/8.4.0/../../../../xtensa-esp32-elf/bin/ld.exe: .pio/build/esp32dev/libfe7/libPPPOSClient.a(PPPOS.c.o): in function `PPPOS_start':
C:\Users\noush\OneDrive\Documents\PlatformIO\Projects\bolt_esp32_ocpp_V4/lib/PPPOSClient/src/PPPOS.c:215: undefined reference to `pppapi_set_default'
c:/users/noush/.platformio/packages/toolchain-xtensa-esp32/bin/../lib/gcc/xtensa-esp32-elf/8.4.0/../../../../xtensa-esp32-elf/bin/ld.exe: C:\Users\noush\OneDrive\Documents\PlatformIO\Projects\bolt_esp32_ocpp_V4/lib/PPPOSClient/src/PPPOS.c:216: undefined reference to `pppapi_set_auth'
c:/users/noush/.platformio/packages/toolchain-xtensa-esp32/bin/../lib/gcc/xtensa-esp32-elf/8.4.0/../../../../xtensa-esp32-elf/bin/ld.exe: C:\Users\noush\OneDrive\Documents\PlatformIO\Projects\bolt_esp32_ocpp_V4/lib/PPPOSClient/src/PPPOS.c:218: undefined reference to `pppapi_connect'
c:/users/noush/.platformio/packages/toolchain-xtensa-esp32/bin/../lib/gcc/xtensa-esp32-elf/8.4.0/../../../../xtensa-esp32-elf/bin/ld.exe: C:\Users\noush\OneDrive\Documents\PlatformIO\Projects\bolt_esp32_ocpp_V4/lib/PPPOSClient/src/PPPOS.c:209: undefined reference to `pppapi_pppos_create'
c:/users/noush/.platformio/packages/toolchain-xtensa-esp32/bin/../lib/gcc/xtensa-esp32-elf/8.4.0/../../../../xtensa-esp32-elf/bin/ld.exe: .pio/build/esp32dev/libfe7/libPPPOSClient.a(PPPOS.c.o): in function `PPPOS_stop':
C:\Users\noush\OneDrive\Documents\PlatformIO\Projects\bolt_esp32_ocpp_V4/lib/PPPOSClient/src/PPPOS.c:229: undefined reference to `pppapi_close'
c:/users/noush/.platformio/packages/toolchain-xtensa-esp32/bin/../lib/gcc/xtensa-esp32-elf/8.4.0/../../../../xtensa-esp32-elf/bin/ld.exe: C:\Users\noush\OneDrive\Documents\PlatformIO\Projects\bolt_esp32_ocpp_V4/lib/PPPOSClient/src/PPPOS.c:232: undefined reference to `pppapi_free'
**collect2.exe: error: ld returned 1 exit status**
***** [.pio\build\esp32dev\firmware.elf] Error 1**

I had no issues integrating the library with Espressif32 version 4.0.0.
Any help or advice would be greatly appreciated.

maxgerhardt · December 12, 2023, 11:03am

Wut? Arduino-ESP32 (framework = arduino) has a precompiled ESP-IDF base, you can’t add config flags after the fact. It has no effect, nothing in LWIP or ESP-IDF is recompiled. For that it has to be an ESP-IDF project with Arduino-ESP32 as a ESP-IDF component (framework = arduino, espidf). Use platform-espressif32/examples/espidf-arduino-blink at develop · platformio/platform-espressif32 · GitHub as a starting point. Use menuconfig to add you needed config options, not build_flags.

noushukalathil7 · December 12, 2023, 11:32am

Hello,

I’m currently working with Espressif32 (version 6.4.0) using the Arduino framework. In this version, I’ve included the flags CONFIG_PPP_SUPPORT and CONFIG_LWIP_PPP_SUPPORT, and the code compiles successfully. However, during the linking phase, there are issues as the linker cannot locate references to certain variables.

maxgerhardt · December 12, 2023, 11:49am

Undefiend reference is exactly what you get when you are changing the build flags so that it thinks certain function exist, but those aren’t actually in the precompiled ESP-IDF file. Again, using the method above will work for that.

noushukalathil7 · December 12, 2023, 12:11pm

Hi,

After removing all the flags I couldn’t even compile, the code got some undefined functions and variables.

maxgerhardt · December 12, 2023, 12:12pm

And that happened with what platformio.ini and a clean blinky code?

noushukalathil7 · December 12, 2023, 2:27pm

I tried the espidf-arduino-blink code to build successfully in 3 environment, then I add pppos client dependency and got the following errors

without pppos client

with pppos client

Processing esp320 (board: esp320; platform: espressif32; framework: arduino, espidf)
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Verbose mode can be enabled via `-v, --verbose` option
CONFIGURATION: https://docs.platformio.org/page/boards/espressif32/esp320.html
PLATFORM: Espressif 32 (6.4.0) > Electronic SweetPeas ESP320
HARDWARE: ESP32 240MHz, 320KB RAM, 4MB Flash
DEBUG: Current (cmsis-dap) External (cmsis-dap, esp-bridge, esp-prog, iot-bus-jtag, jlink, minimodule, olimex-arm-usb-ocd, olimex-arm-usb-ocd-h, olimex-arm-usb-tiny-h, olimex-jtag-tiny, tumpa)
PACKAGES:
 - framework-arduinoespressif32 @ 3.20011.230801 (2.0.11)
 - framework-espidf @ 3.40405.230623 (4.4.5)
 - tool-cmake @ 3.16.4
 - tool-esptoolpy @ 1.40501.0 (4.5.1)
 - tool-idf @ 1.0.1
 - tool-mconf @ 1.4060000.20190628 (406.0.0)
 - tool-ninja @ 1.9.0
 - toolchain-esp32ulp @ 1.23500.220830 (2.35.0)
 - toolchain-xtensa-esp32 @ 8.4.0+2021r2-patch5
Warning! Arduino framework as an ESP-IDF component doesn't handle the `variant` field! The default `esp32` variant will be used.
Reading CMake configuration...
LDF: Library Dependency Finder -> https://bit.ly/configure-pio-ldf
LDF Modes: Finder ~ chain, Compatibility ~ soft
Found 34 compatible libraries
Scanning dependencies...
Dependency Graph
|-- PPPOSClient @ 1.0.0
Building in release mode
Compiling .pio\build\esp320\lib0b2\PPPOSClient\PPPOS.c.o
Compiling .pio\build\esp320\lib0b2\PPPOSClient\PPPOSClient.cpp.o
In file included from .pio/libdeps/esp320/PPPOSClient/src/PPPOS.c:8:
C:/Users/noush/.platformio/packages/framework-espidf/components/esp_event/include/esp_event_loop.h:2:2: warning: #warning "esp_event_loop.h is deprecated, please include esp_event.h instead" [-Wcpp]
 #warning "esp_event_loop.h is deprecated, please include esp_event.h instead"
  ^~~~~~~
In file included from .pio/libdeps/esp320/PPPOSClient/src/PPPOS.c:14:
C:/Users/noush/.platformio/packages/framework-espidf/components/tcpip_adapter/include/tcpip_adapter.h:15:2: warning: #warning "This header is deprecated, please use new network related API in esp_netif.h" [-Wcpp]
 #warning "This header is deprecated, please use new network related API in esp_netif.h"
  ^~~~~~~
.pio/libdeps/esp320/PPPOSClient/src/PPPOS.c:43:1: error: unknown type name 'ppp_pcb'
 ppp_pcb *ppp;
 ^~~~~~~
.pio/libdeps/esp320/PPPOSClient/src/PPPOS.c:49:27: error: unknown type name 'ppp_pcb'
 static void ppp_status_cb(ppp_pcb *pcb, int err_code, void *ctx)
                           ^~~~~~~
.pio/libdeps/esp320/PPPOSClient/src/PPPOS.c:149:34: error: unknown type name 'ppp_pcb'
 static u32_t ppp_output_callback(ppp_pcb *pcb, u8_t *data, u32_t len, void *ctx)
                                  ^~~~~~~
.pio/libdeps/esp320/PPPOSClient/src/PPPOS.c: In function 'pppos_client_task':
.pio/libdeps/esp320/PPPOSClient/src/PPPOS.c:165:17: error: implicit declaration of function 'pppos_input_tcpip'; did you mean 'gpio_input_get'? [-Werror=implicit-function-declaration]
                 pppos_input_tcpip(ppp, (u8_t *)data, len);
                 ^~~~~~~~~~~~~~~~~
                 gpio_input_get
.pio/libdeps/esp320/PPPOSClient/src/PPPOS.c: In function 'PPPOS_init':
.pio/libdeps/esp320/PPPOSClient/src/PPPOS.c:191:3: warning: 'tcpip_adapter_init' is deprecated [-Wdeprecated-declarations]
   tcpip_adapter_init();
   ^~~~~~~~~~~~~~~~~~
In file included from C:/Users/noush/.platformio/packages/framework-espidf/components/esp_netif/include/esp_netif.h:35,
                 from C:/Users/noush/.platformio/packages/framework-espidf/components/esp_event/include/esp_event_legacy.h:22,
                 from C:/Users/noush/.platformio/packages/framework-espidf/components/esp_event/include/esp_event.h:28,
                 from C:/Users/noush/.platformio/packages/framework-espidf/components/esp_wifi/include/esp_wifi.h:56,
                 from .pio/libdeps/esp320/PPPOSClient/src/PPPOS.c:7:
C:/Users/noush/.platformio/packages/framework-espidf/components/tcpip_adapter/include/tcpip_adapter.h:34:6: note: declared here
 void tcpip_adapter_init(void)  __attribute__ ((deprecated));
      ^~~~~~~~~~~~~~~~~~
.pio/libdeps/esp320/PPPOSClient/src/PPPOS.c: In function 'PPPOS_start':
.pio/libdeps/esp320/PPPOSClient/src/PPPOS.c:203:15: error: implicit declaration of function 'pppapi_pppos_create' [-Werror=implicit-function-declaration]
         ppp = pppapi_pppos_create(&ppp_netif, ppp_output_callback, ppp_status_cb, NULL);
               ^~~~~~~~~~~~~~~~~~~
.pio/libdeps/esp320/PPPOSClient/src/PPPOS.c:203:47: error: 'ppp_output_callback' undeclared (first use in this function); did you mean 'dns_found_callback'?
         ppp = pppapi_pppos_create(&ppp_netif, ppp_output_callback, ppp_status_cb, NULL);
                                               ^~~~~~~~~~~~~~~~~~~
                                               dns_found_callback
.pio/libdeps/esp320/PPPOSClient/src/PPPOS.c:203:47: note: each undeclared identifier is reported only once for each function it appears in
.pio/libdeps/esp320/PPPOSClient/src/PPPOS.c:203:68: error: 'ppp_status_cb' undeclared (first use in this function); did you mean 'nvs_stats_t'?
         ppp = pppapi_pppos_create(&ppp_netif, ppp_output_callback, ppp_status_cb, NULL);
                                                                    ^~~~~~~~~~~~~
                                                                    nvs_stats_t
.pio/libdeps/esp320/PPPOSClient/src/PPPOS.c:209:9: error: implicit declaration of function 'pppapi_set_default'; did you mean 'netif_set_default'? [-Werror=implicit-function-declaration]
         pppapi_set_default(ppp);
         ^~~~~~~~~~~~~~~~~~
         netif_set_default
.pio/libdeps/esp320/PPPOSClient/src/PPPOS.c:210:9: error: implicit declaration of function 'pppapi_set_auth' [-Werror=implicit-function-declaration]
         pppapi_set_auth(ppp, PPPAUTHTYPE_PAP, PPP_User, PPP_Pass);
         ^~~~~~~~~~~~~~~
.pio/libdeps/esp320/PPPOSClient/src/PPPOS.c:210:30: error: 'PPPAUTHTYPE_PAP' undeclared (first use in this function); did you mean 'IP_SET_TYPE_VAL'?
         pppapi_set_auth(ppp, PPPAUTHTYPE_PAP, PPP_User, PPP_Pass);
                              ^~~~~~~~~~~~~~~
                              IP_SET_TYPE_VAL
.pio/libdeps/esp320/PPPOSClient/src/PPPOS.c:211:9: error: implicit declaration of function 'ppp_set_usepeerdns' [-Werror=implicit-function-declaration]
         ppp_set_usepeerdns(ppp, 1);
         ^~~~~~~~~~~~~~~~~~
.pio/libdeps/esp320/PPPOSClient/src/PPPOS.c:212:9: error: implicit declaration of function 'pppapi_connect'; did you mean 'lwip_connect'? [-Werror=implicit-function-declaration]
         pppapi_connect(ppp, 0);
         ^~~~~~~~~~~~~~
         lwip_connect
.pio/libdeps/esp320/PPPOSClient/src/PPPOS.c: In function 'PPPOS_stop':
.pio/libdeps/esp320/PPPOSClient/src/PPPOS.c:223:3: error: implicit declaration of function 'pppapi_close'; did you mean 'lwip_close'? [-Werror=implicit-function-declaration]    
   pppapi_close(ppp, 0);
   ^~~~~~~~~~~~
   lwip_close
At top level:
.pio/libdeps/esp320/PPPOSClient/src/PPPOS.c:40:20: warning: 'TAG' defined but not used [-Wunused-variable]
 static const char *TAG = "status";
                    ^~~
cc1.exe: some warnings being treated as errors
*** [.pio\build\esp320\lib0b2\PPPOSClient\PPPOS.c.o] Error 1
In file included from C:/Users/noush/.platformio/packages/framework-arduinoespressif32/cores/esp32/esp32-hal.h:80,
                 from C:/Users/noush/.platformio/packages/framework-arduinoespressif32/cores/esp32/Arduino.h:36,
                 from .pio/libdeps/esp320/PPPOSClient/src/PPPOSClient.h:10,
                 from .pio/libdeps/esp320/PPPOSClient/src/PPPOSClient.cpp:1:
.pio/libdeps/esp320/PPPOSClient/src/PPPOSClient.cpp: In member function 'virtual size_t PPPOSClient::write(const uint8_t*, size_t)':
.pio/libdeps/esp320/PPPOSClient/src/PPPOSClient.cpp:159:59: error: 'fd' was not declared in this scope
                 log_e("fail on fd %d, errno: %d, \"%s\"", fd(), errno, strerror(errno));
                                                           ^~
.pio/libdeps/esp320/PPPOSClient/src/PPPOSClient.cpp:159:17: note: in expansion of macro 'log_e'
                 log_e("fail on fd %d, errno: %d, \"%s\"", fd(), errno, strerror(errno));
                 ^~~~~
.pio/libdeps/esp320/PPPOSClient/src/PPPOSClient.cpp:159:59: note: suggested alternative: 'find'
                 log_e("fail on fd %d, errno: %d, \"%s\"", fd(), errno, strerror(errno));
                                                           ^~
.pio/libdeps/esp320/PPPOSClient/src/PPPOSClient.cpp:159:17: note: in expansion of macro 'log_e'
                 log_e("fail on fd %d, errno: %d, \"%s\"", fd(), errno, strerror(errno));
                 ^~~~~
*** [.pio\build\esp320\lib0b2\PPPOSClient\PPPOSClient.cpp.o] Error 1
========================================================================== [FAILED] Took 11.74 seconds ==========================================================================

Environment    Status    Duration
-------------  --------  ------------
esp32dev       FAILED    00:00:13.303
espea32        FAILED    00:00:11.063
esp320         FAILED    00:00:11.737
===================================================================== 3 failed, 0 succeeded in 00:00:36.104 =====================================================================

Environment setup
[env]

platform = espressif32

framework = arduino, espidf

build_flags =

-D CONFIG_BLINK_GPIO=2

monitor_speed = 115200

lib_deps = levkovigor/PPPOSClient@^1.0

[env:esp32dev]

board = esp32dev

[env:espea32]

board = espea32

[env:esp320]

board = esp320

maxgerhardt · December 12, 2023, 3:16pm

Seems like you’re running into https://github.com/levkovigor/ppposclient/issues/8 which technically is the responsibility of the library author

noushukalathil7:

.pio/libdeps/esp320/PPPOSClient/src/PPPOS.c:165:17: error: implicit declaration of function 'pppos_input_tcpip'; did you mean 'gpio_input_get'? [-Werror=implicit-function-declaration]
                 pppos_input_tcpip(ppp, (u8_t *)data, len);

Did you use menuconfig to activate PPP / PPPOS support? That function is only visible if

github.com

espressif/esp-lwip/blob/1de11efadd0083469f26c8782be3d55073829767/src/include/netif/ppp/pppos.h#L35-L35


      
          #if PPP_SUPPORT && PPPOS_SUPPORT /* don't build if not configured for use in lwipopts.h */

noushukalathil7 · December 13, 2023, 10:00am

Hi,
After activating ppp/pppos via menuconfig, I can build the espidf-arduino-blink code successfully.

But I am working on a project written only in arduino framework, I think it doesn’t have menuconfig option, then how can I enable ppp/pppos?. I tried via build flag but got some errors like undefined references .Is there any other method to fix this?
my project environment

[env:esp32dev]
platform = espressif32
board = esp32dev
board_build.partitions = min_spiffs.csv
framework = arduino
monitor_speed = 115200
lib_deps = 
	https://github.com/tzapu/WiFiManager.git
	https://github.com/anupamsaikia/ArduinoOcpp.git
	fastled/FastLED@^3.5.0
	xoseperez/HLW8012@^1.1.2
	lib/PPPOSClient
build_flags =
    -D AO_DBG_LEVEL=AO_DL_INFO ; flood the serial monitor with information about the internal state
    -DAO_TRAFFIC_OUT   ; print the OCPP communication to the serial monitor

maxgerhardt · December 13, 2023, 5:40pm

Well, at least what I found is that I get the least amount of errors and warnings using actually Arduino-ESP 1.0.6 (and not 2.0.0 as the project described) and fixing what seems to be a bug (fd() → socketfiledescriptor). I’ve forked the library from an also more advanced fork and can successfully compile the original example code with just

[env:esp32dev]
; will use Arduino-ESP32 1.0.6 at that platform version
platform = espressif32@^3.0.0
board = esp32dev
framework = arduino
lib_deps =
  knolleary/PubSubClient@^2.8
  https://github.com/maxgerhardt/ppposclient/archive/refs/heads/main.zip

Ultimately: It’s the library authors responsbility to make sure they Arduino library works with the latest framework.

noushukalathil7 · December 14, 2023, 6:44am

Hello,
I am looking for a PPPoS client library compatible with the latest Arduino framework(Espressif32 v-6.4.0). Our project requires integration of GSM with PPPoS. Your help is greatly appreciated.

Thanks.