[glibc/azanella/clang] Remove libc_hidden_proto (confstr)

[Adhemerval Zanella <azanella@sourceware.org>]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=a1ac1870564b8693278b22ac5c477398f5e9638c

commit a1ac1870564b8693278b22ac5c477398f5e9638c
Author: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Date:   Mon Mar 7 15:35:26 2022 -0300

    Remove libc_hidden_proto (confstr)

Diff:
---
 debug/confstr_chk.c | 2 +-
 include/unistd.h    | 1 -
 posix/confstr.c     | 1 -
 3 files changed, 1 insertion(+), 3 deletions(-)

diff --git a/debug/confstr_chk.c b/debug/confstr_chk.c
index a73bdcdd4f..67823d6670 100644
--- a/debug/confstr_chk.c
+++ b/debug/confstr_chk.c
@@ -24,5 +24,5 @@ __confstr_chk (int name, char *buf, size_t len, size_t buflen)
   if (__glibc_unlikely (buflen < len))
     __chk_fail ();
 
-  return confstr (name, buf, len);
+  return __confstr (name, buf, len);
 }
diff --git a/include/unistd.h b/include/unistd.h
index af795a37c8..8f35fd1b5a 100644
--- a/include/unistd.h
+++ b/include/unistd.h
@@ -13,7 +13,6 @@ rtld_hidden_proto (_exit, __noreturn__)
 libc_hidden_proto (alarm)
 extern size_t __confstr (int name, char *buf, size_t len);
 libc_hidden_proto (__confstr)
-libc_hidden_proto (confstr)
 libc_hidden_proto (execl)
 libc_hidden_proto (execle)
 libc_hidden_proto (execlp)
diff --git a/posix/confstr.c b/posix/confstr.c
index 6e3c264462..cfaab1cfa0 100644
--- a/posix/confstr.c
+++ b/posix/confstr.c
@@ -290,5 +290,4 @@ __confstr (int name, char *buf, size_t len)
   return string_len;
 }
 libc_hidden_def (__confstr)
-libc_hidden_def (confstr)
 weak_alias (__confstr, confstr)