/sshnpd/srv/src/srv.c:273:13: error: incompatible pointer to integer conversion initializing 'pthread_t' (aka 'unsigned long') with an expression of type 'void *' [-Wint-conversion]

[cpswan]

Describe the bug

When building C sshnpd for linux/amd64 (glibc) as action for release c0.2.4

#9 15.95 [ 38%] Building C object _deps/srv-lib-build/CMakeFiles/srv-lib.dir/src/srv.c.o
#9 16.01 /sshnpd/srv/src/srv.c:273:13: error: incompatible pointer to integer conversion initializing 'pthread_t' (aka 'unsigned long') with an expression of type 'void *' [-Wint-conversion]
#9 16.01   273 |   pthread_t tid = NULL;
#9 16.01       |             ^     ~~~~
#9 16.01 1 error generated.
#9 16.01 make[2]: *** [_deps/srv-lib-build/CMakeFiles/srv-lib.dir/build.make:104: _deps/srv-lib-build/CMakeFiles/srv-lib.dir/src/srv.c.o] Error 1
#9 16.01 make[1]: *** [CMakeFiles/Makefile2:3375: _deps/srv-lib-build/CMakeFiles/srv-lib.dir/all] Error 2
#9 16.01 make: *** [Makefile:136: all] Error 2

Steps to reproduce

1. First I created a new release c0.2.4 to incorporate fix: clang-tidy using private macos headers #1521 and fix: undo sys/wait removal #1522
2. Then the C_Release_Automation workflow was triggered and run
3. And then the docker_build (linux/amd64, sshnpd-linux-x64) job failed emitting the log snippet pasted above

Expected behavior

Clean build with no warnings

Additional context

musl_build (linux/amd64, sshnpd-linux-x64-musl) succeeded, so this likely relates to gcc and glibc