Files:
tests/test-posix_spawn3.c
tests/signature.h

Depends-on:
posix_spawn_file_actions_init
posix_spawn_file_actions_addopen
posix_spawn_file_actions_destroy
stdbool
unistd
sys_wait
environ

configure.ac:
AC_EGREP_CPP([notposix], [[
#if defined _MSC_VER || defined __MINGW32__
  notposix
#endif
  ]],
  [posix_spawn_ported=no],
  [posix_spawn_ported=yes])
AM_CONDITIONAL([POSIX_SPAWN_PORTED], [test $posix_spawn_ported = yes])

Makefile.am:
if POSIX_SPAWN_PORTED
TESTS += test-posix_spawn3
check_PROGRAMS += test-posix_spawn3
endif