Fails to build on musl based distributions

[markand]

Is there an existing issue for this?

• This is a bug in RetroArch frontend
• I have searched the existing issues

Description

Hi,

It looks like 1.20.0 assumes that pthread_t is an integer which is defined as an opaque type per POSIX specifications. Thus it fails to build on musl:

CC tasks/task_file_transfer.c
input/common/linux_common.c: In function 'linux_close_illuminance_sensor':
input/common/linux_common.c:265:26: error: initialization of 'pthread_t' {aka 'struct __pthread *'} from 'uintptr_t' {aka 'unsigned int'} makes pointer from integer without a cast [-Wint-conversion]
  265 |       pthread_t thread = sthread_get_thread_id(sensor->thread);
      |                          ^~~~~~~~~~~~~~~~~~~~~
CC tasks/task_image.c
make: *** [Makefile:209: obj-unix/release/input/common/linux_common.o] Error 1
make: *** Waiting for unfinished jobs....
input/drivers/linuxraw_input.c: In function 'linuxraw_input_state':
input/drivers/linuxraw_input.c:123:14: warning: the comparison will always evaluate as 'true' for the pointer operand in 'binds + (sizetype)(port * 3560)' must not be NULL [-Waddress]
  123 |          if (binds[port])
      |              ^~~~~
>>> ERROR: retroarch: build failed

I'll address a pull request to fix the issue later on (unless someone does it faster).

Expected behavior

No response

Steps to reproduce the bug

1. Build on any musl linux distribution

Version/Commit

1.20.0

Bisect Results

No response

Present in the nightly version

I don't know

Platform & operating system

alpine linux 3.21.0

Affected Cores

No response

Environment information

No response

Relevant log output

[markand]

Fixed with #17512