directive writing 36 bytes into a region of size between 33 and 64 [-Werror=format-overflow=]

[dr2okevin]

I'm getting the following error while running make all, and I have no Idea how to resolve this.

/home/kevin/esp/esp32-sniffer/components/espmqtt/lib/transport_ws.c: In function 'ws_connect':
/home/kevin/esp/esp32-sniffer/components/espmqtt/lib/transport_ws.c:100:53: error: '258EAFA5-E914-47DA-95CA-C5AB...' directive writing 36 bytes into a region of size between 33 and 64 [-Werror=format-overflow=]
     int key_len = sprintf((char*)client_key_b64, "%s258EAFA5-E914-47DA-95CA-C5AB0DC85B11", (char*)client_key);
                                                     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/home/kevin/esp/esp32-sniffer/components/espmqtt/lib/transport_ws.c:100:19: note: 'sprintf' output between 37 and 68 bytes into a destination of size 64
     int key_len = sprintf((char*)client_key_b64, "%s258EAFA5-E914-47DA-95CA-C5AB0DC85B11", (char*)client_key);
                   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
cc1: some warnings being treated as errors
make[1]: *** [/home/kevin/esp/esp-idf/make/component_wrapper.mk:298: lib/transport_ws.o] Fehler 1
make: *** [/home/kevin/esp/esp-idf/make/project.mk:649: component-espmqtt-build] Fehler 2

I'm using Ubuntu 20.04

[J4NN0]

Hi @dr2okevin,

I am curious which ESP-IDF are you using? I've build this firmware times ago, so I don't really remember well but if I remember correctly I used version 3.2. Could you please make sure you're using the same version? Looking at the error I think it's just a version compatibility.

Let me know.

[dr2okevin]

I have just installed it with the command from the readme git clone --recursive https://github.com/espressif/esp-idf.git I couldn't find any version ifnormation besides this

cat toolchain_versions.mk 
SUPPORTED_TOOLCHAIN_COMMIT_DESC = esp-2021r1
SUPPORTED_TOOLCHAIN_GCC_VERSIONS = 8.4.0

CURRENT_TOOLCHAIN_COMMIT_DESC = esp-2021r1
CURRENT_TOOLCHAIN_COMMIT_DESC_SHORT = esp-2021r1
CURRENT_TOOLCHAIN_GCC_VERSION = 8.4.0

[J4NN0]

As you can see from the official ESP-IDF git repisotory (i.e. the link from which you're clonig the framework) there are different releases.

When you run git clone --recursive https://github.com/espressif/esp-idf.git and clone the repo, you're automatically using the latest stable version (i.e. master branch), that in this case - according to this - is ESP-IDF Release v4.3.1.

Probably there are some "major changes" between v3.x and v4.x - or at least, this is what that screenshot above is suggesting to me. Therefore, what you can try to do is to checkout to branch 3.x (if I remeber correctly I used v3.2, so let's try with this one) and then try again to compile (i.e. make all).

[Rai0Catodic0]

Hi, I'm facing the same error. I've tried to use release 3.2 of the EPS-IDF but there is no install script. How did you install that version?