Unable to link when I add any code related to wifi

[dattodroid]

I just added idf.wifi.setDefaultWifiStationHandlers() to lib.zip::app_main()

ESP-IDF is 5.2.1
IDF Tools esp-13.2.0_20230928/xtensa-esp-elf/bin/xtensa-esp32s3-elf-g++
Zig is 0.14.0-dev.xtensa.745+c2683125b

/home/sma/.espressif/tools/xtensa-esp-elf/esp-13.2.0_20230928/xtensa-esp-elf/bin/xtensa-esp32s3-elf-g++ -mlongcalls -Wl,--cref -Wl,--defsym=IDF_TARGET_ESP32S3=0

/home/sma/.espressif/tools/xtensa-esp-elf/esp-13.2.0_20230928/xtensa-esp-elf/bin/../lib/gcc/xtensa-esp-elf/13.2.0/../../../../xtensa-esp-elf/bin/ld: lib/libzig.a(../build/esp-idf/esp_wifi/CMakeFiles/__idf_esp_wifi.dir/src/wifi_default.c.obj):(.literal.wifi_default_action_sta_got_ip+0xc): undefined reference to `esp_wifi_internal_set_sta_ip'
...
many more

esp_wifi_internal_set_sta_ip is present in esp_wifi.a

[kassane]

Hi @dattodroid,

Interesting, although the wi-fi and bluetooth wrapper is unfinished.

My question about this is:
Does this error only occur on the first build or does it repeat on the rebuild?

Because the function below would be a hacking for zig collect all obj files from esp-idf in the lib without the need to recompile using zig cc.
https://github.com/kassane/zig-esp-idf-sample/blob/main/build.zig#L85-L106

[kassane]

Did you add the esp_protocol component?

https://github.com/espressif/esp-protocols/blob/a8f13bc861f913b649dd9c8d2cf36b665e6989a6/components/esp_wifi_remote/esp_wifi_remote_net.c#L44-L46

---

I will try to replicate this problem.

[kassane]

Not zig issue!!

my test get same error:

Tests

diff --git a/main/CMakeLists.txt b/main/CMakeLists.txt
index 3f6af0a..aeebc7e 100644
--- a/main/CMakeLists.txt
+++ b/main/CMakeLists.txt
@@ -1,4 +1,4 @@
-set(DEPS pthread driver)
+set(DEPS pthread esp_netif driver esp_wifi vfs console esp_eth)
 
 idf_component_register(SRCS "placeholder.c"
     INCLUDE_DIRS "."
diff --git a/main/idf_component.yml b/main/idf_component.yml
index f17b35f..8659050 100644
--- a/main/idf_component.yml
+++ b/main/idf_component.yml
@@ -1,5 +1,7 @@
 ## IDF Component Manager Manifest File
 dependencies:
+  espressif/esp_tinyusb: "^1"
+  espressif/esp_wifi_remote: "^0.3.0"
   ## Required IDF version
   idf:
     version: ">=4.1.0"
diff --git a/main/lib.zig b/main/lib.zig
index 55d9823..5a3dbee 100644
--- a/main/lib.zig
+++ b/main/lib.zig
@@ -2,6 +2,7 @@ const std = @import("std");
 const builtin = @import("builtin");
 const idf = @import("esp_idf");
 
+extern fn esp_wifi_internal_set_sta_ip() c_uint;
 export fn app_main() callconv(.C) void {
     // This allocator is safe to use as the backing allocator w/ arena allocator
     // std.heap.raw_c_allocator
@@ -11,6 +12,8 @@ export fn app_main() callconv(.C) void {
     // idf.heap.MultiHeapAllocator
     // idf.heap.vPortAllocator
 
+    _ = esp_wifi_internal_set_sta_ip();
+
     var heap = idf.heap.HeapCapsAllocator.init(.MALLOC_CAP_8BIT);
     var arena = std.heap.ArenaAllocator.init(heap.allocator());
     defer arena.deinit();

/home/kassane/.espressif/tools/xtensa-esp-elf/esp-13.2.0_20240530/xtensa-esp-elf/bin/../lib/gcc/xtensa-esp-elf/13.2.0/../../../../xtensa-esp-elf/bin/ld: lib/libzig.a(/home/kassane/zig-esp-idf-sample/build/../.zig-cache/o/a510fd1f1836e31136f970331f2a4752/libzig.a.o):(.literal+0x20): undefined reference to `esp_wifi_internal_set_sta_ip'
collect2: error: ld returned 1 exit status
ninja: build stopped: subcommand failed.

Missing impl wifi-lib

$ find -L build -name '*wifi.a'
build/esp-idf/esp_wifi/libesp_wifi.a
$ nm build/esp-idf/esp_wifi/libesp_wifi.a | grep esp_wifi_internal
         U esp_wifi_internal_reg_rxcb
         U esp_wifi_internal_set_log_level
         U esp_wifi_internal_reg_netstack_buf_cb
         U esp_wifi_internal_set_sta_ip         # <= undefined
         U esp_wifi_internal_free_rx_buffer
         U esp_wifi_internal_reg_rxcb
         U esp_wifi_internal_tx
$ nm build/lib/libzig.a | grep esp_wifi_internal
         U esp_wifi_internal_issue_disconnect
         U esp_wifi_internal_tx
         U esp_wifi_internal_tx
         U esp_wifi_internal_reg_netstack_buf_cb
         U esp_wifi_internal_set_sta_ip          # <= undefined
         U esp_wifi_internal_free_rx_buffer
         U esp_wifi_internal_reg_rxcb
         U esp_wifi_internal_tx
         U esp_wifi_internal_reg_rxcb
         U esp_wifi_internal_set_log_level
         U esp_wifi_internal_set_sta_ip
$ nm build/esp-idf/wifi_provisioning/libwifi_provisioning.a | grep esp_wifi_internal
$ nm build/esp-idf/espressif__esp_wifi_remote/libespressif__esp_wifi_remote.a | grep esp_wifi_internal

[dattodroid]

I have no doubt it is not a zig issue, but I cannot identify what is specific to the project.
If I build the sample_project example with (without adding any components):

#include <stdio.h>
#include "esp_wifi.h"
void app_main(void)
{
    esp_wifi_set_default_wifi_sta_handlers();
}

It is linking although the same symbols are undefined.

[kassane]

based on espressif/esp-procotols, stubs added
a50beba

Maybe need port to zig espressif/esp-procotols impl.

[dattodroid]

It seems that most of the undefined symbols related to "wifi" are in <IDF_PATH>/components/esp_wifi/lib/esp32s3/libnet80211.a