4 files changed, 8 insertions, 0 deletions
diff --git a/libc/misc/internals/__errno_location.c b/libc/misc/internals/__errno_location.c
index 71c5461a7..aec7641ce 100644
--- a/libc/misc/internals/__errno_location.c
+++ b/libc/misc/internals/__errno_location.c
@@ -15,3 +15,6 @@ __errno_location (void)
 {
     return &errno;
 }
+#ifdef IS_IN_libc /* not really need, only to keep in sync w/ libc_hidden_proto */
+libc_hidden_weak(__errno_location)
+#endif
diff --git a/libc/misc/internals/__h_errno_location.c b/libc/misc/internals/__h_errno_location.c
index 235df4ec6..213d39894 100644
--- a/libc/misc/internals/__h_errno_location.c
+++ b/libc/misc/internals/__h_errno_location.c
@@ -10,3 +10,4 @@ int * weak_const_function __h_errno_location (void)
 {
     return &h_errno;
 }
+libc_hidden_weak(__h_errno_location)
diff --git a/libc/sysdeps/linux/common/bits/errno.h b/libc/sysdeps/linux/common/bits/errno.h
index de9688ac1..0bf6354fb 100644
--- a/libc/sysdeps/linux/common/bits/errno.h
+++ b/libc/sysdeps/linux/common/bits/errno.h
@@ -43,6 +43,7 @@
 # ifndef __ASSEMBLER__
 /* Function to get address of global `errno' variable.  */
 extern int *__errno_location (void) __THROW __attribute__ ((__const__));
+libc_hidden_proto(__errno_location)
 
 #  ifdef __UCLIBC_HAS_THREADS__
 /* When using threads, errno is a per-thread value.  */
diff --git a/libc/sysdeps/linux/common/bits/uClibc_errno.h b/libc/sysdeps/linux/common/bits/uClibc_errno.h
index 79eb7e6bd..9c1561841 100644
--- a/libc/sysdeps/linux/common/bits/uClibc_errno.h
+++ b/libc/sysdeps/linux/common/bits/uClibc_errno.h
@@ -33,6 +33,9 @@ extern int *__errno_location (void) __THROW __attribute__ ((__const__))
 ;
 # if defined __UCLIBC_HAS_THREADS__
 #  include <tls.h>
+#  if defined USE___THREAD && USE___THREAD
+libc_hidden_proto(__errno_location)
+#  endif
 # endif
 
 #endif /* !__ASSEMBLER__ */