PlatformIO Linter Error but then it compiles
Posted: Tue Sep 04, 2018 9:24 pm
by FrAxl93
Good evening everyone,
I am running the several wi-fi examples for esp32 with platformIO on Atom (MAC). The so called "Linter" which from what I have understood is a sort of intellisense that seeks for errors in the code, tells me that I cannot do the following because "C99 designator is outside aggregate initializer":
Code: Select all
wifi_sta_config_t wifi_AP_conf = {.ssid = WIFI_SSID, .password = WIFI_PASS, };
wifi_config_t wifi_config = {
.sta = wifi_AP_conf,
};
But then the compiler magically ends with no error whatsoever. May anyone tell me what's happening?
Thanks a lot,
Regards.
Re: PlatformIO Linter Error but then it compiles
Posted: Wed Sep 05, 2018 2:13 am
by ESP_Angus
This is a g++ compiler error, I'm surprised the compile still succeeds. Designated initializers of this kind are supported in C99 and newer (C language) but not fully supported in C++.
Here's some more discussion on the platform.io github.
You can either:
- Rewrite the code so that the string literals WIFI_SSID and WIFI_PASS are not passed in a designated initializer like this (ie write code like strlcpy(wifi_AP_conf.ssid, sWIFI_SSID, sizeof(wifi_AP_conf.ssid))).
- Move this code to a .c file instead of a .cpp file
- Find some C++ classes which wrap the WiFi support so you don't need to call the ESP-IDF C API. ESP-IDF does not include a C++ WiFi API, but Arduino does and I believe nkolban may have some as well.
Re: PlatformIO Linter Error but then it compiles
Posted: Wed Sep 05, 2018 7:51 pm
by FrAxl93
Thanks very much for your reply.
Although I will try all of your other suggestions, I think that the code was compiling because it was in the "main.c" file, but the "Linter" from PlatformIO still analyzed as it was C++ (I guess?).
Thanks a lot,
Regards, Francesco.
Re: PlatformIO Linter Error but then it compiles
Posted: Thu Sep 06, 2018 2:30 am
by ESP_Angus
Hi Francesco,
FrAxl93 wrote:
Although I will try all of your other suggestions, I think that the code was compiling because it was in the "main.c" file, but the "Linter" from PlatformIO still analyzed as it was C++ (I guess?).
Ah, this seems likely!
Maybe raise this as a bug with the platform.io folks?