Xcode11 beta linker error related with fork function

I have mongoose server in my iOS app, which call fork() system function:

if ((pid = fork()) == -1) { // Parent send_http_error(conn, 500, http_500_error, "fork(): %s", strerror(ERRNO)); }

Started from Xcode 11 beta I can't build the project. I see the following linker error:

Undefined symbols for architecture x86_64:

"___gcov_flush", referenced from: _spawn_process in mongoose.o

ld: symbol(s) not found for architecture x86_64 clang: error: linker command failed with exit code 1 (use -v to see invocation)

I tried comment fork() function and error disappeared.

We're still experiencing the same error in Xcode 12.3.
Xcode11 beta linker error related with fork function
 
 
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