x86_64-managarm-gcc -pthread  -Wall -Wextra -Werror=implicit-function-declaration spawn/posix_spawnattr_getpgroup.c -o spawn/posix_spawnattr_getpgroup -D_GNU_SOURCE -D_BSD_SOURCE -D_ALL_SOURCE -D_DEFAULT_SOURCE -lm -lpthread -lrt -lintl -liconv
spawn/posix_spawnattr_getpgroup.c: In function ‘main’:
spawn/posix_spawnattr_getpgroup.c:15:23: error: implicit declaration of function ‘posix_spawnattr_getpgroup’; did you mean ‘posix_spawnattr_setpgroup’? [-Wimplicit-function-declaration]
   15 |         if ( (errno = posix_spawnattr_getpgroup(&attr, &pgroup)) )
      |                       ^~~~~~~~~~~~~~~~~~~~~~~~~
      |                       posix_spawnattr_setpgroup