Error at build: Cannot convert from int64 to time_t

[raspbeguy]

Describe the bug

I'm trying to build release version 4.11.0.

At build time, I've got several errors:

../src/Services/CalendarEvents/Util.vala:164.16-164.25: error: Assignment: Cannot convert from `int64' to `time_t'
  164 |         time_t start_unix = start_time.as_timet_with_zone (system_timezone);
      |                ^~~~~~~~~~                                                   
../src/Services/CalendarEvents/Util.vala:165.16-165.23: error: Assignment: Cannot convert from `int64' to `time_t'
  165 |         time_t end_unix = end_time.as_timet_with_zone (system_timezone);

To Reproduce
After installing all dependencies, try to compile by running:

meson build --prefix=/usr
cd build
ninja

Expected behavior
Build should succeed

Desktop (please complete the following information):

• OS or DE: Alpine Linux

Additional context
Trying to package the program for the Alpine distro.

[raspbeguy]

Seems to be fixed by casting to time_t the result of start_time.as_timet_with_zone (system_timezone).

Now I've got:

src/io.github.alainm23.planify.p/Services/CalendarEvents/CalendarEvents.c: In function 'services_calendar_events_constructor':
src/io.github.alainm23.planify.p/Services/CalendarEvents/CalendarEvents.c:2297:31: error: '_NL_TIME_FIRST_WEEKDAY' undeclared (first use in this function)
 2297 |         _tmp8_ = nl_langinfo (_NL_TIME_FIRST_WEEKDAY);
      |                               ^~~~~~~~~~~~~~~~~~~~~~

This error seems to be related to glibc. Alpine Linux uses musl instead of glibc.

[raspbeguy]

Vala error seems to come from:

../src/Services/CalendarEvents/CalendarEvents.vala: In function 'services_calendar_events_constructor':
../src/Services/CalendarEvents/CalendarEvents.vala:68:24: error: '_NL_TIME_FIRST_WEEKDAY' undeclared (first use in this function)
   68 |         int week_start = Posix.NLTime.FIRST_WEEKDAY.to_string ().data[0];
      |                        ^~~~~~~~~~~~~~~~~~~~~~

[golamrabbiazad]

yesterday, I built the project and it was successfully built with 0 errors. Please ensure that your valac compiler version is up to date, preferably v0.56.17.

[raspbeguy]

I am using valac 0.56.16 (version available in Alpine Linux Edge) which isn't that old. I will try to update it, but I'm not convinced that's the problem. Did you try to build it with musl libc?

[golamrabbiazad]

No, I haven't tried to build with musl libc. Is it a dependency for this project?

[golamrabbiazad]

Actually, I have satisfied the dependency needs for the project, built it, and it was successfully built.

[raspbeguy]

This is not. Musl is a libc, like glibc. Glibc is adopted by most Linux distros, except a few like Alpine, which chose to replace glibc by musl.