4 files changed, 35 insertions, 14 deletions
diff --git a/libc/misc/internals/__errno_location.c b/libc/misc/internals/__errno_location.c
index 10b97753f..c0b1532b9 100644
--- a/libc/misc/internals/__errno_location.c
+++ b/libc/misc/internals/__errno_location.c
@@ -1,7 +1,15 @@
 #include <errno.h>
+
+#ifndef __UCLIBC_HAS_THREADS_NATIVE__
 #undef errno
+extern int errno;
+#endif
 
-int * weak_const_function __errno_location (void)
+int *
+#ifndef __UCLIBC_HAS_THREADS_NATIVE__
+weak_const_function
+#endif
+__errno_location (void)
 {
     return &errno;
 }
diff --git a/libc/misc/internals/errno.c b/libc/misc/internals/errno.c
index f2424eae0..107b61403 100644
--- a/libc/misc/internals/errno.c
+++ b/libc/misc/internals/errno.c
@@ -1,6 +1,24 @@
 #include <features.h>
-#undef errno
 
+#ifdef __UCLIBC_HAS_THREADS_NATIVE__
+__thread int errno;
+__thread int h_errno;
+
+#ifdef SHARED
+/*
+ * FIXME: Add usage of hidden attribute for both of these when used in
+ *        the shared library. It currently crashes the linker when doing
+ *        section relocations.
+ */
+extern __thread int __libc_errno __attribute__ ((alias ("errno")));
+extern __thread int __libc_h_errno __attribute__ ((alias ("h_errno")));
+#else
+extern __thread int __libc_errno __attribute__ ((alias ("errno")));
+extern __thread int __libc_h_errno __attribute__ ((alias ("h_errno")));
+#endif
+#define h_errno __libc_h_errno
+
+#else
 extern int errno;
 extern int h_errno;
 
@@ -15,3 +33,4 @@ int _h_errno = 0;
 
 weak_alias (_errno, errno)
 weak_alias(_h_errno, h_errno);
+#endif
diff --git a/libc/sysdeps/linux/common/bits/errno.h b/libc/sysdeps/linux/common/bits/errno.h
index bf73a8fe1..03d4729f6 100644
--- a/libc/sysdeps/linux/common/bits/errno.h
+++ b/libc/sysdeps/linux/common/bits/errno.h
@@ -31,20 +31,10 @@
 
 # ifndef __ASSEMBLER__
 
-/* We now need a declaration of the `errno' variable.  */
-extern int errno;
-
 /* Function to get address of global `errno' variable.  */
 extern int *__errno_location (void) __THROW __attribute__ ((__const__));
 
-#  if defined _LIBC
-/* We wouldn't need a special macro anymore but it is history.  */
-#   ifndef __set_errno
-#    define __set_errno(val) ((errno) = (val))
-#   endif
-#  endif /* _LIBC */
-
-#  if defined __UCLIBC_HAS_THREADS__
+#  if !defined _LIBC || defined __UCLIBC_HAS_THREADS__
 /* When using threads, errno is a per-thread value.  */
 #   define errno (*__errno_location ())
 #  endif
diff --git a/libc/sysdeps/linux/mips/bits/syscalls.h b/libc/sysdeps/linux/mips/bits/syscalls.h
index 8645d9d75..09688dd1b 100644
--- a/libc/sysdeps/linux/mips/bits/syscalls.h
+++ b/libc/sysdeps/linux/mips/bits/syscalls.h
@@ -10,7 +10,11 @@
 #include <bits/sysnum.h>
 
 #ifndef __set_errno
-# define __set_errno(val) (*__errno_location ()) = (val)
+# ifdef __UCLIBC_HAS_THREADS__
+#  define __set_errno(val) (*__errno_location ()) = (val)
+# else
+#  define __set_errno(val) (errno = (val))
+# endif
 #endif
 #ifndef SYS_ify
 # define SYS_ify(syscall_name)  (__NR_##syscall_name)