commit 2a973ab7f1a6f6cd9be1c7257fd7b5d331515eab
Author: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Date:   Wed Sep 12 10:30:46 2018 -0300

    posix: Add internal symbols for posix_spawn interface
    
    This patch adds internal hidden definition for mostly of the posix_spawn
    function so it can be used internally on both popen and system
    implementations.
    
    Checked on x86_64-linux-gnu.
    
            * include/spawn.h (__posix_spawn, posix_spawn_file_actions_addclose,
            __posix_spawn_file_actions_adddup2, __posix_spawn_file_actions_destroy,
            __posix_spawn_file_actions_init, __posix_spawnattr_init,
            __posix_spawnattr_destroy, __posix_spawnattr_setflags,
            __posix_spawnattr_setsigdefault, __posix_spawnattr_setsigmask): New
            prototype.
            * posix/spawn.c (__posix_spawn): Add libc_hidden_def.
            * posix/spawn_faction_addclose.c
            (__posix_spawn_file_actions_addclose): Add hidden definition.
            * posix/spawn_faction_adddup2.c
            (__posix_spawn_file_actions_adddup2): Likewise.
            * posix/spawn_faction_destroy.c
            (__posix_spawn_file_actions_destroy): Likewise.
            * posix/spawn_faction_init.c (__posix_spawn_file_actions_init):
            Likewise.
            * posix/spawnattr_destroy.c (__posix_spawnattr_destroy): Likewise.
            * posix/spawnattr_init.c (__posix_spawnattr_init): Likewise.
            * posix/spawnattr_setdefault.c (__posix_spawnattr_setsigdefault):
            Likewise.
            * posix/spawnattr_setflags.c (__posix_spawnattr_setflags): Likewise.
            * posix/spawnattr_setsigmask.c (__posix_spawnattr_setsigmask):
            Likewise.

diff --git a/include/spawn.h b/include/spawn.h
index a6c7a8adc361927e..7fdd965bd780f8de 100644
--- a/include/spawn.h
+++ b/include/spawn.h
@@ -1 +1,36 @@
+#ifndef _SPAWN_H
 #include <posix/spawn.h>
+
+# ifndef _ISOMAC
+__typeof (posix_spawn) __posix_spawn;
+libc_hidden_proto (__posix_spawn)
+
+__typeof (posix_spawn_file_actions_addclose)
+  __posix_spawn_file_actions_addclose attribute_hidden;
+
+__typeof (posix_spawn_file_actions_adddup2)
+  __posix_spawn_file_actions_adddup2 attribute_hidden;
+
+__typeof (posix_spawn_file_actions_destroy)
+  __posix_spawn_file_actions_destroy attribute_hidden;
+
+__typeof (posix_spawn_file_actions_init) __posix_spawn_file_actions_init
+  attribute_hidden;
+
+__typeof (posix_spawnattr_init) __posix_spawnattr_init
+  attribute_hidden;
+
+__typeof (posix_spawnattr_destroy) __posix_spawnattr_destroy
+  attribute_hidden;
+
+__typeof (posix_spawnattr_setflags) __posix_spawnattr_setflags
+  attribute_hidden;
+
+__typeof (posix_spawnattr_setsigdefault) __posix_spawnattr_setsigdefault
+  attribute_hidden;
+
+__typeof (posix_spawnattr_setsigmask) __posix_spawnattr_setsigmask
+  attribute_hidden;
+
+# endif /* !_ISOMAC  */
+#endif /* spawn.h  */
diff --git a/posix/spawn.c b/posix/spawn.c
index 51f67b2755bd4949..a82f1c84e299f018 100644
--- a/posix/spawn.c
+++ b/posix/spawn.c
@@ -30,6 +30,7 @@ __posix_spawn (pid_t *pid, const char *path,
   return __spawni (pid, path, file_actions, attrp, argv, envp, 0);
 }
 versioned_symbol (libc, __posix_spawn, posix_spawn, GLIBC_2_15);
+libc_hidden_def (__posix_spawn)
 
 
 #if SHLIB_COMPAT (libc, GLIBC_2_2, GLIBC_2_15)
diff --git a/posix/spawn_faction_addclose.c b/posix/spawn_faction_addclose.c
index 21081e19b55db44c..e1fafe438cf15c91 100644
--- a/posix/spawn_faction_addclose.c
+++ b/posix/spawn_faction_addclose.c
@@ -24,8 +24,8 @@
 /* Add an action to FILE-ACTIONS which tells the implementation to call
    `close' for the given file descriptor during the `spawn' call.  */
 int
-posix_spawn_file_actions_addclose (posix_spawn_file_actions_t *file_actions,
-				   int fd)
+__posix_spawn_file_actions_addclose (posix_spawn_file_actions_t *file_actions,
+				     int fd)
 {
   struct __spawn_action *rec;
 
@@ -48,3 +48,5 @@ posix_spawn_file_actions_addclose (posix_spawn_file_actions_t *file_actions,
 
   return 0;
 }
+weak_alias (__posix_spawn_file_actions_addclose,
+	    posix_spawn_file_actions_addclose)
diff --git a/posix/spawn_faction_adddup2.c b/posix/spawn_faction_adddup2.c
index 363bc29ae502bd60..371b1de3e6f1979a 100644
--- a/posix/spawn_faction_adddup2.c
+++ b/posix/spawn_faction_adddup2.c
@@ -24,8 +24,8 @@
 /* Add an action to FILE-ACTIONS which tells the implementation to call
    `dup2' for the given file descriptors during the `spawn' call.  */
 int
-posix_spawn_file_actions_adddup2 (posix_spawn_file_actions_t *file_actions,
-				  int fd, int newfd)
+__posix_spawn_file_actions_adddup2 (posix_spawn_file_actions_t *file_actions,
+				    int fd, int newfd)
 {
   struct __spawn_action *rec;
 
@@ -49,3 +49,5 @@ posix_spawn_file_actions_adddup2 (posix_spawn_file_actions_t *file_actions,
 
   return 0;
 }
+weak_alias (__posix_spawn_file_actions_adddup2,
+	    posix_spawn_file_actions_adddup2)
diff --git a/posix/spawn_faction_destroy.c b/posix/spawn_faction_destroy.c
index 46061ee3473d4475..2a2de4e41d6bd6d0 100644
--- a/posix/spawn_faction_destroy.c
+++ b/posix/spawn_faction_destroy.c
@@ -22,7 +22,7 @@
 
 /* Deallocate the file actions.  */
 int
-posix_spawn_file_actions_destroy (posix_spawn_file_actions_t *file_actions)
+__posix_spawn_file_actions_destroy (posix_spawn_file_actions_t *file_actions)
 {
   /* Free the paths in the open actions.  */
   for (int i = 0; i < file_actions->__used; ++i)
@@ -44,3 +44,5 @@ posix_spawn_file_actions_destroy (posix_spawn_file_actions_t *file_actions)
   free (file_actions->__actions);
   return 0;
 }
+weak_alias (__posix_spawn_file_actions_destroy,
+	    posix_spawn_file_actions_destroy)
diff --git a/posix/spawn_faction_init.c b/posix/spawn_faction_init.c
index ddb42e6a77ba41ec..98432067c645021e 100644
--- a/posix/spawn_faction_init.c
+++ b/posix/spawn_faction_init.c
@@ -45,9 +45,10 @@ __posix_spawn_file_actions_realloc (posix_spawn_file_actions_t *file_actions)
 
 /* Initialize data structure for file attribute for `spawn' call.  */
 int
-posix_spawn_file_actions_init (posix_spawn_file_actions_t *file_actions)
+__posix_spawn_file_actions_init (posix_spawn_file_actions_t *file_actions)
 {
   /* Simply clear all the elements.  */
   memset (file_actions, '\0', sizeof (*file_actions));
   return 0;
 }
+weak_alias (__posix_spawn_file_actions_init, posix_spawn_file_actions_init)
diff --git a/posix/spawnattr_destroy.c b/posix/spawnattr_destroy.c
index 603e00fffefae2bf..043386778588913a 100644
--- a/posix/spawnattr_destroy.c
+++ b/posix/spawnattr_destroy.c
@@ -19,8 +19,9 @@
 
 /* Initialize data structure for file attribute for `spawn' call.  */
 int
-posix_spawnattr_destroy (posix_spawnattr_t *attr)
+__posix_spawnattr_destroy (posix_spawnattr_t *attr)
 {
   /* Nothing to do in the moment.  */
   return 0;
 }
+weak_alias (__posix_spawnattr_destroy, posix_spawnattr_destroy)
diff --git a/posix/spawnattr_init.c b/posix/spawnattr_init.c
index bab464e62bdf7889..4e1218ab44e3f779 100644
--- a/posix/spawnattr_init.c
+++ b/posix/spawnattr_init.c
@@ -20,7 +20,7 @@
 
 /* Initialize data structure for file attribute for `spawn' call.  */
 int
-posix_spawnattr_init (posix_spawnattr_t *attr)
+__posix_spawnattr_init (posix_spawnattr_t *attr)
 {
   /* All elements have to be initialized to the default values which
      is generally zero.  */
@@ -28,3 +28,4 @@ posix_spawnattr_init (posix_spawnattr_t *attr)
 
   return 0;
 }
+weak_alias (__posix_spawnattr_init, posix_spawnattr_init)
diff --git a/posix/spawnattr_setdefault.c b/posix/spawnattr_setdefault.c
index c77cda59be3dda20..174bcfa423dc5666 100644
--- a/posix/spawnattr_setdefault.c
+++ b/posix/spawnattr_setdefault.c
@@ -20,11 +20,12 @@
 
 /* Set signal mask for signals with default handling in ATTR to SIGDEFAULT.  */
 int
-posix_spawnattr_setsigdefault (posix_spawnattr_t *attr,
-			       const sigset_t *sigdefault)
+__posix_spawnattr_setsigdefault (posix_spawnattr_t *attr,
+				 const sigset_t *sigdefault)
 {
   /* Copy the sigset_t data to the user buffer.  */
   memcpy (&attr->__sd, sigdefault, sizeof (sigset_t));
 
   return 0;
 }
+weak_alias (__posix_spawnattr_setsigdefault, posix_spawnattr_setsigdefault)
diff --git a/posix/spawnattr_setflags.c b/posix/spawnattr_setflags.c
index cf9a60181dc91ccd..0a42e94770224a94 100644
--- a/posix/spawnattr_setflags.c
+++ b/posix/spawnattr_setflags.c
@@ -30,7 +30,7 @@
 
 /* Store flags in the attribute structure.  */
 int
-posix_spawnattr_setflags (posix_spawnattr_t *attr, short int flags)
+__posix_spawnattr_setflags (posix_spawnattr_t *attr, short int flags)
 {
   /* Check no invalid bits are set.  */
   if (flags & ~ALL_FLAGS)
@@ -41,3 +41,4 @@ posix_spawnattr_setflags (posix_spawnattr_t *attr, short int flags)
 
   return 0;
 }
+weak_alias (__posix_spawnattr_setflags, posix_spawnattr_setflags)
diff --git a/posix/spawnattr_setsigmask.c b/posix/spawnattr_setsigmask.c
index 7ae81ad47025db6f..12c0111af441dd13 100644
--- a/posix/spawnattr_setsigmask.c
+++ b/posix/spawnattr_setsigmask.c
@@ -20,7 +20,7 @@
 
 /* Set signal mask for the new process in ATTR to SIGMASK.  */
 int
-posix_spawnattr_setsigmask (posix_spawnattr_t *attr,
+__posix_spawnattr_setsigmask (posix_spawnattr_t *attr,
 			    const sigset_t *sigmask)
 {
   /* Copy the sigset_t data to the user buffer.  */
@@ -28,3 +28,4 @@ posix_spawnattr_setsigmask (posix_spawnattr_t *attr,
 
   return 0;
 }
+weak_alias (__posix_spawnattr_setsigmask, posix_spawnattr_setsigmask)