Introduce NO_RTLD_HIDDEN, make hurd use it instead of NO_HIDDEN

On the Hurd, the rtld needs to see its own dumb versions of a few functions
(defined in sysdeps/mach/hurd/dl-sysdep.c) overridden by libc's versions once
loaded. rtld should thus not have hidden attribute for these.  To achieve this,
the Hurd port used to just define NO_HIDDEN, which disables it completely. For
now, this changes that to disabling it for all rtld functions, for simplicity.

See Roland's comment on https://sourceware.org/bugzilla/show_bug.cgi?id=15605#c5

The ld.so numbers remain at

  8 .rel.plt      000000c8  00000c24  00000c24  00000c24  2**2
                  CONTENTS, ALLOC, LOAD, READONLY, DATA
  9 .plt          000001a0  00000cf0  00000cf0  00000cf0  2**4
                  CONTENTS, ALLOC, LOAD, READONLY, CODE
 10 .plt.got      00000010  00000e90  00000e90  00000e90  2**3
                  CONTENTS, ALLOC, LOAD, READONLY, CODE
 18 .got.plt      00000070  0002d000  0002d000  0002c000  2**2
                  CONTENTS, ALLOC, LOAD, DATA

which is about 3 times as much as on Linux.

The libc.so numbers get divided by 3 (the remainings are mostly RPC stub calls)

	* include/libc-symbols.h [NO_RTLD_HIDDEN] (rtld_hidden_proto,
	rtld_hidden_tls_proto, rtld_hidden_def, rtld_hidden_weak,
	rtld_hidden_rtld_hidden_ver, data_def, rtld_hidden_data_weak,
	rtld_hidden_data_ver): Define to empty.
	* include/assert.h [IS_IN(rtld) && NO_RTLD_HIDDEN] (__assert_fail,
	__assert_perror_fail): Likewise.
	* include/dirent.h [IS_IN(rtld) && NO_RTLD_HIDDEN]
	(__rewinddir): Likewise.
	* include/libc-internal.h [IS_IN(rtld) && NO_RTLD_HIDDEN]
	(__profile_frequency): Likewise.
	* include/setjmp.h (__sigsetjmp): Likewise.
	* include/signal.h [IS_IN(rtld) && NO_RTLD_HIDDEN] (__sigaction,
	__libc_sigaction): Likewise.
	* include/stdlib.h [NO_RTLD_HIDDEN] (unsetenv, __strtoul_internal): Do
	not set hidden attribute.
	* include/string.h [IS_IN(rtld) && NO_RTLD_HIDDEN] (__stpcpy, __strdup,
	__strerror_t, __strsep_g, memchr, memcmp, memcpy, memmove, memset,
	rawmemchr, stpcpy, strchr, strcmp, strlen, strnlen, strsep): Likewise.
	* include/sys/stat.h [IS_IN(rtld) && NO_RTLD_HIDDEN] (__fxstat,
	__fxstat64, __lxstat, __lxstat64, __xstat, __xstat64,
	__fxstatat64): Likewise.
	* include/sys/utsname.h [IS_IN(rtld) && NO_RTLD_HIDDEN]
	(__uname): Likewise.
	* include/sysdeps/generic/_itoa.h [IS_IN(rtld) && NO_RTLD_HIDDEN]
	(_itoa_upper_digits, _itoa_lower_digits): Likewise.
	* sysdeps/mach/hurd/configure.ac (NO_HIDDEN): Do not set.
	(NO_RTLD_HIDDEN): Set.
	* sysdeps/mach/hurd/configure: Refresh.
	* config.h.in: Refresh.

10 files changed, 11 insertions, 11 deletions

diff --git a/include/assert.h b/include/assert.h
index c0f7e1a..61cc8aa 100644
--- a/include/assert.h
+++ b/include/assert.h
@@ -20,7 +20,7 @@ extern void __assert_fail_base (const char *fmt, const char *assertion,
 				const char *function)
      __THROW  __attribute__ ((__noreturn__)) attribute_hidden;
 
-# if IS_IN (libc) || IS_IN (rtld)
+# if IS_IN (libc) || (IS_IN (rtld) && !defined NO_RTLD_HIDDEN)
 hidden_proto (__assert_fail)
 hidden_proto (__assert_perror_fail)
 # endif
diff --git a/include/dirent.h b/include/dirent.h
index 6fcc2f3..caaeb0b 100644
--- a/include/dirent.h
+++ b/include/dirent.h
@@ -77,7 +77,7 @@ extern __typeof (scandirat) __scandirat;
 libc_hidden_proto (__scandirat)
 libc_hidden_proto (scandirat64)
 
-#  if IS_IN (rtld)
+#  if IS_IN (rtld) && !defined NO_RTLD_HIDDEN
 extern __typeof (__rewinddir) __rewinddir attribute_hidden;
 #  endif
 # endif
diff --git a/include/libc-internal.h b/include/libc-internal.h
index 7403c24..69cd781a 100644
--- a/include/libc-internal.h
+++ b/include/libc-internal.h
@@ -49,7 +49,7 @@ extern void __libc_thread_freeres (void);
 /* Define and initialize `__progname' et. al.  */
 extern void __init_misc (int, char **, char **) attribute_hidden;
 
-# if IS_IN (rtld)
+# if IS_IN (rtld) && !defined NO_RTLD_HIDDEN
 extern __typeof (__profile_frequency) __profile_frequency attribute_hidden;
 # endif
 
diff --git a/include/libc-symbols.h b/include/libc-symbols.h
index 10fd206..e0d4dc3 100644
--- a/include/libc-symbols.h
+++ b/include/libc-symbols.h
@@ -558,7 +558,7 @@ for linking")
 # define libc_hidden_data_ver(local, name)
 #endif
 
-#if IS_IN (rtld)
+#if IS_IN (rtld) && !defined NO_RTLD_HIDDEN
 # define rtld_hidden_proto(name, attrs...) hidden_proto (name, ##attrs)
 # define rtld_hidden_tls_proto(name, attrs...) hidden_tls_proto (name, ##attrs)
 # define rtld_hidden_def(name) hidden_def (name)
diff --git a/include/setjmp.h b/include/setjmp.h
index e45328b..c234287 100644
--- a/include/setjmp.h
+++ b/include/setjmp.h
@@ -28,7 +28,7 @@ libc_hidden_proto (__libc_longjmp)
 libc_hidden_proto (_setjmp)
 libc_hidden_proto (__sigsetjmp)
 
-# if IS_IN (rtld)
+# if IS_IN (rtld) && !defined NO_RTLD_HIDDEN
 extern __typeof (__sigsetjmp) __sigsetjmp attribute_hidden;
 # endif
 #endif
diff --git a/include/signal.h b/include/signal.h
index 7cbe64b..293258a 100644
--- a/include/signal.h
+++ b/include/signal.h
@@ -54,7 +54,7 @@ extern int __xpg_sigpause (int sig);
 /* Allocate real-time signal with highest/lowest available priority.  */
 extern int __libc_allocate_rtsig (int __high);
 
-#  if IS_IN (rtld)
+#  if IS_IN (rtld) && !defined NO_RTLD_HIDDEN
 extern __typeof (__sigaction) __sigaction attribute_hidden;
 extern __typeof (__libc_sigaction) __libc_sigaction attribute_hidden;
 #  endif
diff --git a/include/stdlib.h b/include/stdlib.h
index c0fcb95..5974fb3 100644
--- a/include/stdlib.h
+++ b/include/stdlib.h
@@ -294,7 +294,7 @@ struct abort_msg_s
 extern struct abort_msg_s *__abort_msg;
 libc_hidden_proto (__abort_msg)
 
-# if IS_IN (rtld)
+# if IS_IN (rtld) && !defined NO_RTLD_HIDDEN
 extern __typeof (unsetenv) unsetenv attribute_hidden;
 extern __typeof (__strtoul_internal) __strtoul_internal attribute_hidden;
 # endif
diff --git a/include/string.h b/include/string.h
index 968d6fe..bb4922c 100644
--- a/include/string.h
+++ b/include/string.h
@@ -143,7 +143,7 @@ libc_hidden_builtin_proto (strspn)
 libc_hidden_builtin_proto (strstr)
 libc_hidden_builtin_proto (ffs)
 
-#if IS_IN (rtld)
+#if IS_IN (rtld) && !defined NO_RTLD_HIDDEN
 extern __typeof (__stpcpy) __stpcpy attribute_hidden;
 extern __typeof (__strdup) __strdup attribute_hidden;
 extern __typeof (__strerror_r) __strerror_r attribute_hidden;
diff --git a/include/sys/stat.h b/include/sys/stat.h
index eb44754..b82d452 100644
--- a/include/sys/stat.h
+++ b/include/sys/stat.h
@@ -14,7 +14,7 @@ extern int __mkdir (const char *__path, __mode_t __mode);
 libc_hidden_proto (__mkdir)
 extern int __mknod (const char *__path,
 		    __mode_t __mode, __dev_t __dev);
-#if IS_IN (libc) || IS_IN (rtld)
+#if IS_IN (libc) || (IS_IN (rtld) && !defined NO_RTLD_HIDDEN)
 hidden_proto (__fxstat)
 hidden_proto (__fxstat64)
 hidden_proto (__lxstat)
@@ -37,7 +37,7 @@ libc_hidden_proto (__xmknodat)
 libc_hidden_proto (__fxstatat)
 libc_hidden_proto (__fxstatat64)
 
-# if IS_IN (rtld)
+# if IS_IN (rtld) && !defined NO_RTLD_HIDDEN
 extern __typeof (__fxstatat64) __fxstatat64 attribute_hidden;
 # endif
 
diff --git a/include/sys/utsname.h b/include/sys/utsname.h
index 14f4247..9ed5fa2 100644
--- a/include/sys/utsname.h
+++ b/include/sys/utsname.h
@@ -7,7 +7,7 @@ extern int __uname (struct utsname *__name);
 libc_hidden_proto (uname)
 libc_hidden_proto (__uname)
 
-# if IS_IN (rtld)
+# if IS_IN (rtld) && !defined NO_RTLD_HIDDEN
 extern __typeof (__uname) __uname attribute_hidden;
 # endif
 #endif