hurd: take __USE_EXTERN_INLINES into account and restrict inlines

* hurd/hurd.h (__hurd_fail): Always declare function, and provide inline
version only if __USE_EXTERN_INLINES is defined.
* hurd/hurd/fd.h (_hurd_fd_error_signal, _hurd_fd_error, __hurd_dfail,
__hurd_sockfail): Likewise.
(_hurd_fd_get): Always declare functions, and provide inline versions
only if __USE_EXTERN_INLINES and _LIBC are defined and IS_IN(libc).
* hurd/hurd/port.h (_hurd_port_init, _hurd_port_locked_get,
_hurd_port_get, _hurd_port_free, _hurd_port_locked_set,
_hurd_port_set): Always declare functions, and provide inline versions
only if __USE_EXTERN_INLINES and _LIBC are defined and
IS_IN(libc).
* hurd/hurd/signal.h (_hurd_self_sigstate, _hurd_critical_section_lock,
_hurd_critical_section_unlock): Likewise.
* hurd/hurd/threadvar.h (__hurd_threadvar_location_from_sp,
* __hurd_threadvar_location): Likewise.
* hurd/hurd/userlink.h (_hurd_userlink_link, _hurd_userlink_unlink,
_hurd_userlink_clear): Likewise.
* mach/lock-intern.h (__spin_lock_init, __spin_lock, __mutex_lock,
__mutex_unlock, __mutex_trylock): Always declare functions, and provide
inline versions only if __USE_EXTERN_INLINES and _LIBC are defined.
* mach/mach/mig_support.h (__mig_strncpy): Likewise.
* sysdeps/generic/machine-lock.h (__spin_unlock, __spin_try_lock,
__spin_lock_locked): Likewise.
* sysdeps/mach/i386/machine-lock.h (__spin_unlock, __spin_try_lock,
__spin_lock_locked): Likewise.
* mach/spin-lock.c (__USE_EXTERN_INLINES): Define to 1.
* hurd/Versions (libc: GLIBC_2.27): Add _hurd_fd_error_signal,
_hurd_fd_error, __hurd_dfail, __hurd_sockfail, _hurd_port_locked_set,
__hurd_threadvar_location_from_sp, __hurd_threadvar_location,
_hurd_userlink_link, _hurd_userlink_unlink, _hurd_userlink_clear.

3 files changed, 24 insertions, 0 deletions

diff --git a/mach/lock-intern.h b/mach/lock-intern.h
index af28c3ff8f..f8874c7561 100644
--- a/mach/lock-intern.h
+++ b/mach/lock-intern.h
@@ -28,11 +28,15 @@
 
 /* Initialize LOCK.  */
 
+extern void __spin_lock_init (__spin_lock_t *__lock);
+
+#if defined __USE_EXTERN_INLINES && defined _LIBC
 _EXTERN_INLINE void
 __spin_lock_init (__spin_lock_t *__lock)
 {
   *__lock = __SPIN_LOCK_INITIALIZER;
 }
+#endif
 
 
 /* Lock LOCK, blocking if we can't get it.  */
@@ -40,12 +44,16 @@ extern void __spin_lock_solid (__spin_lock_t *__lock);
 
 /* Lock the spin lock LOCK.  */
 
+extern void __spin_lock (__spin_lock_t *__lock);
+
+#if defined __USE_EXTERN_INLINES && defined _LIBC
 _EXTERN_INLINE void
 __spin_lock (__spin_lock_t *__lock)
 {
   if (! __spin_try_lock (__lock))
     __spin_lock_solid (__lock);
 }
+#endif
 
 /* Name space-clean internal interface to mutex locks.
 
@@ -70,27 +78,39 @@ extern void __mutex_unlock_solid (void *__lock);
 
 /* Lock the mutex lock LOCK.  */
 
+extern void __mutex_lock (void *__lock);
+
+#if defined __USE_EXTERN_INLINES && defined _LIBC
 _EXTERN_INLINE void
 __mutex_lock (void *__lock)
 {
   if (! __spin_try_lock ((__spin_lock_t *) __lock))
     __mutex_lock_solid (__lock);
 }
+#endif
 
 /* Unlock the mutex lock LOCK.  */
 
+extern void __mutex_unlock (void *__lock);
+
+#if defined __USE_EXTERN_INLINES && defined _LIBC
 _EXTERN_INLINE void
 __mutex_unlock (void *__lock)
 {
   __spin_unlock ((__spin_lock_t *) __lock);
   __mutex_unlock_solid (__lock);
 }
+#endif
 
 
+extern int __mutex_trylock (void *__lock);
+
+#if defined __USE_EXTERN_INLINES && defined _LIBC
 _EXTERN_INLINE int
 __mutex_trylock (void *__lock)
 {
   return __spin_try_lock ((__spin_lock_t *) __lock);
 }
+#endif
 
 #endif /* lock-intern.h */
diff --git a/mach/mach/mig_support.h b/mach/mach/mig_support.h
index e876c0980b..56ec6dfab8 100644
--- a/mach/mach/mig_support.h
+++ b/mach/mach/mig_support.h
@@ -66,6 +66,8 @@ extern void mig_reply_setup (const mach_msg_header_t *__request,
 /* Idiocy support function.  */
 extern vm_size_t mig_strncpy (char *__dst, const char *__src, vm_size_t __len);
 extern vm_size_t __mig_strncpy (char *__dst, const char *__src, vm_size_t);
+
+#if defined __USE_EXTERN_INLINES && defined _LIBC
 __extern_inline vm_size_t
 __mig_strncpy (char *__dst, const char *__src, vm_size_t __len)
 {
@@ -76,6 +78,7 @@ mig_strncpy (char *__dst, const char *__src, vm_size_t __len)
 {
   return __mig_strncpy (__dst, __src, __len);
 }
+#endif
 
 
 
diff --git a/mach/spin-lock.c b/mach/spin-lock.c
index aaebc55cf4..1b1e69c8d6 100644
--- a/mach/spin-lock.c
+++ b/mach/spin-lock.c
@@ -1,3 +1,4 @@
+#define __USE_EXTERN_INLINES 1
 #define _EXTERN_INLINE /* Empty to define the real functions.  */
 #include "spin-lock.h"