commit 2ff48a4025515e93d722947a9eabb114f4a65b22
Author: Florian Weimer <fweimer@redhat.com>
Date:   Fri Nov 4 07:43:59 2022 +0100

    posix: Make posix_spawn extensions available by default
    
    Some sources merely include <spawn.h> without -D_GNU_SOURCE and expect
    declarations for posix_spawn_file_actions_addchdir_np to be available.
    For consistency, declare posix_spawn_file_actions_addfchdir_np,
    posix_spawn_file_actions_addclosefrom_np,
    posix_spawn_file_actions_addtcsetpgrp_np as well.
    
    Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>

diff --git a/posix/spawn.h b/posix/spawn.h
index 7cf1a5b628480404..81202ef0caec031c 100644
--- a/posix/spawn.h
+++ b/posix/spawn.h
@@ -198,7 +198,7 @@ extern int posix_spawn_file_actions_adddup2 (posix_spawn_file_actions_t *
 					     int __fd, int __newfd)
      __THROW __nonnull ((1));
 
-#ifdef __USE_GNU
+#ifdef __USE_MISC
 /* Add an action changing the directory to PATH during spawn.  This
    affects the subsequent file actions.  */
 extern int posix_spawn_file_actions_addchdir_np (posix_spawn_file_actions_t *
@@ -227,7 +227,7 @@ posix_spawn_file_actions_addtcsetpgrp_np (posix_spawn_file_actions_t *,
 					  int __tcfd)
      __THROW __nonnull ((1));
 
-#endif
+#endif /* __USE_MISC */
 
 __END_DECLS