Function gettimeofday isn't recognized (IDFGH-9002)

[findmyname666]

Answers checklist.

• [X] I have read the documentation ESP-IDF Programming Guide and the issue is not addressed there.
• [X] I have updated my IDF branch (master or release) to the latest version and checked that the issue is present there.
• [X] I have searched the issue tracker for a similar issue and not found a similar issue.

IDF version.

v5.1-dev

Operating System used.

Linux

How did you build your project?

Command line with idf.py

If you are using Windows, please specify command line type.

None

What is the expected behavior?

Based on the doc it should return the current time.

What is the actual behavior?

Compilation fails:

/home/findmyname/Documents/esp/project/test/main/main.c:519:5: error: implicit declaration of function 'gettimeofday'; did you mean '_gettimeofday_r'? [-Werror=implicit-function-declaration]
  519 |     gettimeofday(&tv_now, NULL);
      |     ^~~~~~~~~~~~
      |     _gettimeofday_r

Steps to reproduce.

I have this function:

static int64_t get_time(void)
{
    struct timeval tv_now;
    gettimeofday(&tv_now, NULL);
    return (int64_t)tv_now.tv_sec;
}

Build or installation Logs.

I executed these commands:

$ git checkout v5.1-dev
$ └──╼$ git submodule update --init --recursive
Submodule path 'components/bt/controller/lib_esp32': checked out 'c98341759b2c152c58878db6daf22d153a75fda4'
Submodule path 'components/bt/controller/lib_esp32c2/esp32c2-bt-lib': checked out 'bdab852aa2adf459d643731b513a4431003943b6'
Submodule path 'components/bt/controller/lib_esp32c3_family': checked out 'd1c2082e5633a89c6fd6051c7761c1e697cb7a2e'
Submodule path 'components/bt/host/nimble/nimble': checked out 'c1cb851c8562d0f1a4d105614c336341e2a535b2'
Submodule path 'components/esp_phy/lib': checked out '8d3ce02436066e33e8964d34981a97fe64edae2e'
Submodule path 'components/esp_wifi/lib': checked out '3a69afcd419114281a027d8792e2bfa03044fedd'
Submodule path 'components/ieee802154/lib': checked out 'd9838acadd72e5021cee5f79a897e195076d3645'
Submodule path 'components/lwip/lwip': checked out '3f5a04bc63c8c1b1509bfe06cf941a51c9e80d4a'
Submodule path 'components/mbedtls/mbedtls': checked out '9bb5effc3298265f829878825d9bd38478e67514'
Submodule path 'components/openthread/lib': checked out 'af1ac2b3770335db96702bcb06ca793a1425dc86'
Submodule path 'components/openthread/openthread': checked out 'c055c10a9a1362a96687614d4478dd2773e6ddc0'
Submodule path 'components/protobuf-c/protobuf-c': checked out 'f224ab2eeb648a818eb20687d7150a285442c907'

$ install.sh esp32 esp32s2

### More Information.

I had the same error on the latest master.

[AxelLin]

include <sys/time.h>

[0xjakob]

@findmyname666 does your code have the right includes, as @AxelLin suggested already?

[findmyname666]

Yes it works with include. I'm playing with the older code and I think that it worked without include on older version of esp-idf.

[0xjakob]

@findmyname666

I think that it worked without include on older version of esp-idf.

That is possible if the IDF version is a different major version (e.g. 4.1 vs. 4.4). This is why we introduced migration guides.

If the problem appears when switching between minor versions (e.g. 4.4.1 vs. 4.4.2), then this shouldn't happen and is probably a bug.