Import gnulib's errno module.

gdb/ChangeLog:

        * gnulib/update-gnulib.sh (IMPORTED_GNULIB_MODULES): Add errno.
        * gnulib/import/errno.in.h: Import.
        * gnulib/import/m4/errno_h.m4: Import.
        * gnulib/aclocal.m4: Regenerate.
        * gnulib/configure: Regenerate.
        * gnulib/import/Makefile.am: Update.
        * gnulib/import/Makefile.in: Update.
        * gnulib/import/m4/gnulib-cache.m4: Update.
        * gnulib/import/m4/gnulib-comp.m4: Update.

9 files changed, 1053 insertions, 175 deletions

diff --git a/gdb/gnulib/aclocal.m4 b/gdb/gnulib/aclocal.m4
index f19993c..2f7023d 100644
--- a/gdb/gnulib/aclocal.m4
+++ b/gdb/gnulib/aclocal.m4
@@ -1016,6 +1016,7 @@ m4_include([import/m4/00gnulib.m4])
 m4_include([import/m4/alloca.m4])
 m4_include([import/m4/codeset.m4])
 m4_include([import/m4/configmake.m4])
+m4_include([import/m4/errno_h.m4])
 m4_include([import/m4/extensions.m4])
 m4_include([import/m4/extern-inline.m4])
 m4_include([import/m4/fcntl-o.m4])
diff --git a/gdb/gnulib/configure b/gdb/gnulib/configure
index d9809cc..cffc6f8 100644
--- a/gdb/gnulib/configure
+++ b/gdb/gnulib/configure
@@ -876,10 +876,6 @@ HAVE_SYS_INTTYPES_H
 HAVE_STDINT_H
 NEXT_AS_FIRST_DIRECTIVE_STDINT_H
 NEXT_STDINT_H
-PRAGMA_COLUMNS
-PRAGMA_SYSTEM_HEADER
-INCLUDE_NEXT_AS_FIRST_DIRECTIVE
-INCLUDE_NEXT
 HAVE_SYS_TYPES_H
 HAVE_INTTYPES_H
 HAVE_WCHAR_H
@@ -888,6 +884,21 @@ HAVE_LONG_LONG_INT
 GL_GENERATE_FNMATCH_H_FALSE
 GL_GENERATE_FNMATCH_H_TRUE
 FNMATCH_H
+EOVERFLOW_VALUE
+EOVERFLOW_HIDDEN
+ENOLINK_VALUE
+ENOLINK_HIDDEN
+EMULTIHOP_VALUE
+EMULTIHOP_HIDDEN
+GL_GENERATE_ERRNO_H_FALSE
+GL_GENERATE_ERRNO_H_TRUE
+ERRNO_H
+NEXT_AS_FIRST_DIRECTIVE_ERRNO_H
+NEXT_ERRNO_H
+PRAGMA_COLUMNS
+PRAGMA_SYSTEM_HEADER
+INCLUDE_NEXT_AS_FIRST_DIRECTIVE
+INCLUDE_NEXT
 pkglibexecdir
 lispdir
 GL_GENERATE_ALLOCA_H_FALSE
@@ -2038,45 +2049,6 @@ $as_echo "$ac_res" >&6; }
 
 } # ac_fn_c_check_func
 
-# ac_fn_c_check_decl LINENO SYMBOL VAR
-# ------------------------------------
-# Tests whether SYMBOL is declared, setting cache variable VAR accordingly.
-ac_fn_c_check_decl ()
-{
-  as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
-  { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether $2 is declared" >&5
-$as_echo_n "checking whether $2 is declared... " >&6; }
-if { as_var=$3; eval "test \"\${$as_var+set}\" = set"; }; then :
-  $as_echo_n "(cached) " >&6
-else
-  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-$4
-int
-main ()
-{
-#ifndef $2
-  (void) $2;
-#endif
-
-  ;
-  return 0;
-}
-_ACEOF
-if ac_fn_c_try_compile "$LINENO"; then :
-  eval "$3=yes"
-else
-  eval "$3=no"
-fi
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
-fi
-eval ac_res=\$$3
-	       { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
-$as_echo "$ac_res" >&6; }
-  eval $as_lineno_stack; test "x$as_lineno_stack" = x && { as_lineno=; unset as_lineno;}
-
-} # ac_fn_c_check_decl
-
 # ac_fn_c_compute_int LINENO EXPR VAR INCLUDES
 # --------------------------------------------
 # Tries to find the compile-time value of EXPR in a program that includes
@@ -2255,6 +2227,45 @@ rm -f conftest.val
 
 } # ac_fn_c_compute_int
 
+# ac_fn_c_check_decl LINENO SYMBOL VAR
+# ------------------------------------
+# Tests whether SYMBOL is declared, setting cache variable VAR accordingly.
+ac_fn_c_check_decl ()
+{
+  as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether $2 is declared" >&5
+$as_echo_n "checking whether $2 is declared... " >&6; }
+if { as_var=$3; eval "test \"\${$as_var+set}\" = set"; }; then :
+  $as_echo_n "(cached) " >&6
+else
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+$4
+int
+main ()
+{
+#ifndef $2
+  (void) $2;
+#endif
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+  eval "$3=yes"
+else
+  eval "$3=no"
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+fi
+eval ac_res=\$$3
+	       { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
+$as_echo "$ac_res" >&6; }
+  eval $as_lineno_stack; test "x$as_lineno_stack" = x && { as_lineno=; unset as_lineno;}
+
+} # ac_fn_c_check_decl
+
 # ac_fn_c_check_type LINENO TYPE VAR INCLUDES
 # -------------------------------------------
 # Tests whether TYPE exists after having included INCLUDES, setting cache
@@ -4288,6 +4299,7 @@ fi
   # Code from module alloca:
   # Code from module alloca-opt:
   # Code from module configmake:
+  # Code from module errno:
   # Code from module extensions:
 
   # Code from module extern-inline:
@@ -5127,6 +5139,492 @@ fi
 
 
 
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether the preprocessor supports include_next" >&5
+$as_echo_n "checking whether the preprocessor supports include_next... " >&6; }
+if test "${gl_cv_have_include_next+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  rm -rf conftestd1a conftestd1b conftestd2
+     mkdir conftestd1a conftestd1b conftestd2
+                                                  cat <<EOF > conftestd1a/conftest.h
+#define DEFINED_IN_CONFTESTD1
+#include_next <conftest.h>
+#ifdef DEFINED_IN_CONFTESTD2
+int foo;
+#else
+#error "include_next doesn't work"
+#endif
+EOF
+     cat <<EOF > conftestd1b/conftest.h
+#define DEFINED_IN_CONFTESTD1
+#include <stdio.h>
+#include_next <conftest.h>
+#ifdef DEFINED_IN_CONFTESTD2
+int foo;
+#else
+#error "include_next doesn't work"
+#endif
+EOF
+     cat <<EOF > conftestd2/conftest.h
+#ifndef DEFINED_IN_CONFTESTD1
+#error "include_next test doesn't work"
+#endif
+#define DEFINED_IN_CONFTESTD2
+EOF
+     gl_save_CPPFLAGS="$CPPFLAGS"
+     CPPFLAGS="$gl_save_CPPFLAGS -Iconftestd1b -Iconftestd2"
+     cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <conftest.h>
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+  gl_cv_have_include_next=yes
+else
+  CPPFLAGS="$gl_save_CPPFLAGS -Iconftestd1a -Iconftestd2"
+        cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <conftest.h>
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+  gl_cv_have_include_next=buggy
+else
+  gl_cv_have_include_next=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+     CPPFLAGS="$gl_save_CPPFLAGS"
+     rm -rf conftestd1a conftestd1b conftestd2
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $gl_cv_have_include_next" >&5
+$as_echo "$gl_cv_have_include_next" >&6; }
+  PRAGMA_SYSTEM_HEADER=
+  if test $gl_cv_have_include_next = yes; then
+    INCLUDE_NEXT=include_next
+    INCLUDE_NEXT_AS_FIRST_DIRECTIVE=include_next
+    if test -n "$GCC"; then
+      PRAGMA_SYSTEM_HEADER='#pragma GCC system_header'
+    fi
+  else
+    if test $gl_cv_have_include_next = buggy; then
+      INCLUDE_NEXT=include
+      INCLUDE_NEXT_AS_FIRST_DIRECTIVE=include_next
+    else
+      INCLUDE_NEXT=include
+      INCLUDE_NEXT_AS_FIRST_DIRECTIVE=include
+    fi
+  fi
+
+
+
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether system header files limit the line length" >&5
+$as_echo_n "checking whether system header files limit the line length... " >&6; }
+if test "${gl_cv_pragma_columns+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+       cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#ifdef __TANDEM
+choke me
+#endif
+
+_ACEOF
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+  $EGREP "choke me" >/dev/null 2>&1; then :
+  gl_cv_pragma_columns=yes
+else
+  gl_cv_pragma_columns=no
+fi
+rm -f conftest*
+
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $gl_cv_pragma_columns" >&5
+$as_echo "$gl_cv_pragma_columns" >&6; }
+  if test $gl_cv_pragma_columns = yes; then
+    PRAGMA_COLUMNS="#pragma COLUMNS 10000"
+  else
+    PRAGMA_COLUMNS=
+  fi
+
+
+
+
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for complete errno.h" >&5
+$as_echo_n "checking for complete errno.h... " >&6; }
+if test "${gl_cv_header_errno_h_complete+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+
+    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <errno.h>
+#if !defined ETXTBSY
+booboo
+#endif
+#if !defined ENOMSG
+booboo
+#endif
+#if !defined EIDRM
+booboo
+#endif
+#if !defined ENOLINK
+booboo
+#endif
+#if !defined EPROTO
+booboo
+#endif
+#if !defined EMULTIHOP
+booboo
+#endif
+#if !defined EBADMSG
+booboo
+#endif
+#if !defined EOVERFLOW
+booboo
+#endif
+#if !defined ENOTSUP
+booboo
+#endif
+#if !defined ENETRESET
+booboo
+#endif
+#if !defined ECONNABORTED
+booboo
+#endif
+#if !defined ESTALE
+booboo
+#endif
+#if !defined EDQUOT
+booboo
+#endif
+#if !defined ECANCELED
+booboo
+#endif
+#if !defined EOWNERDEAD
+booboo
+#endif
+#if !defined ENOTRECOVERABLE
+booboo
+#endif
+#if !defined EILSEQ
+booboo
+#endif
+
+_ACEOF
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+  $EGREP "booboo" >/dev/null 2>&1; then :
+  gl_cv_header_errno_h_complete=no
+else
+  gl_cv_header_errno_h_complete=yes
+fi
+rm -f conftest*
+
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $gl_cv_header_errno_h_complete" >&5
+$as_echo "$gl_cv_header_errno_h_complete" >&6; }
+  if test $gl_cv_header_errno_h_complete = yes; then
+    ERRNO_H=''
+  else
+
+
+
+
+
+
+
+
+     if test $gl_cv_have_include_next = yes; then
+       gl_cv_next_errno_h='<'errno.h'>'
+     else
+       { $as_echo "$as_me:${as_lineno-$LINENO}: checking absolute name of <errno.h>" >&5
+$as_echo_n "checking absolute name of <errno.h>... " >&6; }
+if test "${gl_cv_next_errno_h+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+
+               cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <errno.h>
+
+_ACEOF
+                                                                                                                        case "$host_os" in
+                 aix*) gl_absname_cpp="$ac_cpp -C" ;;
+                 *)    gl_absname_cpp="$ac_cpp" ;;
+               esac
+
+               case "$host_os" in
+                 mingw*)
+                                                                                                                                     gl_dirsep_regex='[/\\]'
+                   ;;
+                 *)
+                   gl_dirsep_regex='\/'
+                   ;;
+               esac
+                                             gl_make_literal_regex_sed='s,[]$^\\.*/[],\\&,g'
+
+               gl_header_literal_regex=`echo 'errno.h' \
+                                        | sed -e "$gl_make_literal_regex_sed"`
+               gl_absolute_header_sed="/${gl_dirsep_regex}${gl_header_literal_regex}/"'{
+                   s/.*"\(.*'"${gl_dirsep_regex}${gl_header_literal_regex}"'\)".*/\1/
+                   s|^/[^/]|//&|
+                   p
+                   q
+                 }'
+                                                            gl_cv_next_errno_h='"'`(eval "$gl_absname_cpp conftest.$ac_ext") 2>&5 |
+                      sed -n "$gl_absolute_header_sed"`'"'
+
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $gl_cv_next_errno_h" >&5
+$as_echo "$gl_cv_next_errno_h" >&6; }
+     fi
+     NEXT_ERRNO_H=$gl_cv_next_errno_h
+
+     if test $gl_cv_have_include_next = yes || test $gl_cv_have_include_next = buggy; then
+       # INCLUDE_NEXT_AS_FIRST_DIRECTIVE='include_next'
+       gl_next_as_first_directive='<'errno.h'>'
+     else
+       # INCLUDE_NEXT_AS_FIRST_DIRECTIVE='include'
+       gl_next_as_first_directive=$gl_cv_next_errno_h
+     fi
+     NEXT_AS_FIRST_DIRECTIVE_ERRNO_H=$gl_next_as_first_directive
+
+
+
+
+    ERRNO_H='errno.h'
+  fi
+
+   if test -n "$ERRNO_H"; then
+  GL_GENERATE_ERRNO_H_TRUE=
+  GL_GENERATE_ERRNO_H_FALSE='#'
+else
+  GL_GENERATE_ERRNO_H_TRUE='#'
+  GL_GENERATE_ERRNO_H_FALSE=
+fi
+
+
+  if test -n "$ERRNO_H"; then
+    { $as_echo "$as_me:${as_lineno-$LINENO}: checking for EMULTIHOP value" >&5
+$as_echo_n "checking for EMULTIHOP value... " >&6; }
+if test "${gl_cv_header_errno_h_EMULTIHOP+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+
+      cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <errno.h>
+#ifdef EMULTIHOP
+yes
+#endif
+
+_ACEOF
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+  $EGREP "yes" >/dev/null 2>&1; then :
+  gl_cv_header_errno_h_EMULTIHOP=yes
+else
+  gl_cv_header_errno_h_EMULTIHOP=no
+fi
+rm -f conftest*
+
+      if test $gl_cv_header_errno_h_EMULTIHOP = no; then
+        cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#define _XOPEN_SOURCE_EXTENDED 1
+#include <errno.h>
+#ifdef EMULTIHOP
+yes
+#endif
+
+_ACEOF
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+  $EGREP "yes" >/dev/null 2>&1; then :
+  gl_cv_header_errno_h_EMULTIHOP=hidden
+fi
+rm -f conftest*
+
+        if test $gl_cv_header_errno_h_EMULTIHOP = hidden; then
+                              if ac_fn_c_compute_int "$LINENO" "EMULTIHOP" "gl_cv_header_errno_h_EMULTIHOP"        "
+#define _XOPEN_SOURCE_EXTENDED 1
+#include <errno.h>
+/* The following two lines are a workaround against an autoconf-2.52 bug.  */
+#include <stdio.h>
+#include <stdlib.h>
+"; then :
+
+fi
+
+        fi
+      fi
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $gl_cv_header_errno_h_EMULTIHOP" >&5
+$as_echo "$gl_cv_header_errno_h_EMULTIHOP" >&6; }
+    case $gl_cv_header_errno_h_EMULTIHOP in
+      yes | no)
+        EMULTIHOP_HIDDEN=0; EMULTIHOP_VALUE=
+        ;;
+      *)
+        EMULTIHOP_HIDDEN=1; EMULTIHOP_VALUE="$gl_cv_header_errno_h_EMULTIHOP"
+        ;;
+    esac
+
+
+  fi
+
+
+  if test -n "$ERRNO_H"; then
+    { $as_echo "$as_me:${as_lineno-$LINENO}: checking for ENOLINK value" >&5
+$as_echo_n "checking for ENOLINK value... " >&6; }
+if test "${gl_cv_header_errno_h_ENOLINK+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+
+      cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <errno.h>
+#ifdef ENOLINK
+yes
+#endif
+
+_ACEOF
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+  $EGREP "yes" >/dev/null 2>&1; then :
+  gl_cv_header_errno_h_ENOLINK=yes
+else
+  gl_cv_header_errno_h_ENOLINK=no
+fi
+rm -f conftest*
+
+      if test $gl_cv_header_errno_h_ENOLINK = no; then
+        cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#define _XOPEN_SOURCE_EXTENDED 1
+#include <errno.h>
+#ifdef ENOLINK
+yes
+#endif
+
+_ACEOF
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+  $EGREP "yes" >/dev/null 2>&1; then :
+  gl_cv_header_errno_h_ENOLINK=hidden
+fi
+rm -f conftest*
+
+        if test $gl_cv_header_errno_h_ENOLINK = hidden; then
+                              if ac_fn_c_compute_int "$LINENO" "ENOLINK" "gl_cv_header_errno_h_ENOLINK"        "
+#define _XOPEN_SOURCE_EXTENDED 1
+#include <errno.h>
+/* The following two lines are a workaround against an autoconf-2.52 bug.  */
+#include <stdio.h>
+#include <stdlib.h>
+"; then :
+
+fi
+
+        fi
+      fi
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $gl_cv_header_errno_h_ENOLINK" >&5
+$as_echo "$gl_cv_header_errno_h_ENOLINK" >&6; }
+    case $gl_cv_header_errno_h_ENOLINK in
+      yes | no)
+        ENOLINK_HIDDEN=0; ENOLINK_VALUE=
+        ;;
+      *)
+        ENOLINK_HIDDEN=1; ENOLINK_VALUE="$gl_cv_header_errno_h_ENOLINK"
+        ;;
+    esac
+
+
+  fi
+
+
+  if test -n "$ERRNO_H"; then
+    { $as_echo "$as_me:${as_lineno-$LINENO}: checking for EOVERFLOW value" >&5
+$as_echo_n "checking for EOVERFLOW value... " >&6; }
+if test "${gl_cv_header_errno_h_EOVERFLOW+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+
+      cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <errno.h>
+#ifdef EOVERFLOW
+yes
+#endif
+
+_ACEOF
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+  $EGREP "yes" >/dev/null 2>&1; then :
+  gl_cv_header_errno_h_EOVERFLOW=yes
+else
+  gl_cv_header_errno_h_EOVERFLOW=no
+fi
+rm -f conftest*
+
+      if test $gl_cv_header_errno_h_EOVERFLOW = no; then
+        cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#define _XOPEN_SOURCE_EXTENDED 1
+#include <errno.h>
+#ifdef EOVERFLOW
+yes
+#endif
+
+_ACEOF
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+  $EGREP "yes" >/dev/null 2>&1; then :
+  gl_cv_header_errno_h_EOVERFLOW=hidden
+fi
+rm -f conftest*
+
+        if test $gl_cv_header_errno_h_EOVERFLOW = hidden; then
+                              if ac_fn_c_compute_int "$LINENO" "EOVERFLOW" "gl_cv_header_errno_h_EOVERFLOW"        "
+#define _XOPEN_SOURCE_EXTENDED 1
+#include <errno.h>
+/* The following two lines are a workaround against an autoconf-2.52 bug.  */
+#include <stdio.h>
+#include <stdlib.h>
+"; then :
+
+fi
+
+        fi
+      fi
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $gl_cv_header_errno_h_EOVERFLOW" >&5
+$as_echo "$gl_cv_header_errno_h_EOVERFLOW" >&6; }
+    case $gl_cv_header_errno_h_EOVERFLOW in
+      yes | no)
+        EOVERFLOW_HIDDEN=0; EOVERFLOW_VALUE=
+        ;;
+      *)
+        EOVERFLOW_HIDDEN=1; EOVERFLOW_VALUE="$gl_cv_header_errno_h_EOVERFLOW"
+        ;;
+    esac
+
+
+  fi
+
+
+
+
 
 
 
@@ -5375,120 +5873,6 @@ $as_echo "#define HAVE_LONG_LONG_INT 1" >>confdefs.h
 
 
 
-  { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether the preprocessor supports include_next" >&5
-$as_echo_n "checking whether the preprocessor supports include_next... " >&6; }
-if test "${gl_cv_have_include_next+set}" = set; then :
-  $as_echo_n "(cached) " >&6
-else
-  rm -rf conftestd1a conftestd1b conftestd2
-     mkdir conftestd1a conftestd1b conftestd2
-                                                  cat <<EOF > conftestd1a/conftest.h
-#define DEFINED_IN_CONFTESTD1
-#include_next <conftest.h>
-#ifdef DEFINED_IN_CONFTESTD2
-int foo;
-#else
-#error "include_next doesn't work"
-#endif
-EOF
-     cat <<EOF > conftestd1b/conftest.h
-#define DEFINED_IN_CONFTESTD1
-#include <stdio.h>
-#include_next <conftest.h>
-#ifdef DEFINED_IN_CONFTESTD2
-int foo;
-#else
-#error "include_next doesn't work"
-#endif
-EOF
-     cat <<EOF > conftestd2/conftest.h
-#ifndef DEFINED_IN_CONFTESTD1
-#error "include_next test doesn't work"
-#endif
-#define DEFINED_IN_CONFTESTD2
-EOF
-     gl_save_CPPFLAGS="$CPPFLAGS"
-     CPPFLAGS="$gl_save_CPPFLAGS -Iconftestd1b -Iconftestd2"
-     cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-#include <conftest.h>
-_ACEOF
-if ac_fn_c_try_compile "$LINENO"; then :
-  gl_cv_have_include_next=yes
-else
-  CPPFLAGS="$gl_save_CPPFLAGS -Iconftestd1a -Iconftestd2"
-        cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-#include <conftest.h>
-_ACEOF
-if ac_fn_c_try_compile "$LINENO"; then :
-  gl_cv_have_include_next=buggy
-else
-  gl_cv_have_include_next=no
-fi
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
-
-fi
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
-     CPPFLAGS="$gl_save_CPPFLAGS"
-     rm -rf conftestd1a conftestd1b conftestd2
-
-fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $gl_cv_have_include_next" >&5
-$as_echo "$gl_cv_have_include_next" >&6; }
-  PRAGMA_SYSTEM_HEADER=
-  if test $gl_cv_have_include_next = yes; then
-    INCLUDE_NEXT=include_next
-    INCLUDE_NEXT_AS_FIRST_DIRECTIVE=include_next
-    if test -n "$GCC"; then
-      PRAGMA_SYSTEM_HEADER='#pragma GCC system_header'
-    fi
-  else
-    if test $gl_cv_have_include_next = buggy; then
-      INCLUDE_NEXT=include
-      INCLUDE_NEXT_AS_FIRST_DIRECTIVE=include_next
-    else
-      INCLUDE_NEXT=include
-      INCLUDE_NEXT_AS_FIRST_DIRECTIVE=include
-    fi
-  fi
-
-
-
-  { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether system header files limit the line length" >&5
-$as_echo_n "checking whether system header files limit the line length... " >&6; }
-if test "${gl_cv_pragma_columns+set}" = set; then :
-  $as_echo_n "(cached) " >&6
-else
-       cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-
-#ifdef __TANDEM
-choke me
-#endif
-
-_ACEOF
-if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
-  $EGREP "choke me" >/dev/null 2>&1; then :
-  gl_cv_pragma_columns=yes
-else
-  gl_cv_pragma_columns=no
-fi
-rm -f conftest*
-
-
-fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $gl_cv_pragma_columns" >&5
-$as_echo "$gl_cv_pragma_columns" >&6; }
-  if test $gl_cv_pragma_columns = yes; then
-    PRAGMA_COLUMNS="#pragma COLUMNS 10000"
-  else
-    PRAGMA_COLUMNS=
-  fi
-
-
-
-
 
 
 
@@ -8317,6 +8701,7 @@ fi
 
 
 
+
   FNMATCH_H=
   gl_fnmatch_required_lowercase=`
     echo $gl_fnmatch_required | LC_ALL=C tr '[A-Z]' '[a-z]'
@@ -12062,6 +12447,10 @@ if test -z "${GL_GENERATE_ALLOCA_H_TRUE}" && test -z "${GL_GENERATE_ALLOCA_H_FAL
   as_fn_error "conditional \"GL_GENERATE_ALLOCA_H\" was never defined.
 Usually this means the macro was only invoked conditionally." "$LINENO" 5
 fi
+if test -z "${GL_GENERATE_ERRNO_H_TRUE}" && test -z "${GL_GENERATE_ERRNO_H_FALSE}"; then
+  as_fn_error "conditional \"GL_GENERATE_ERRNO_H\" was never defined.
+Usually this means the macro was only invoked conditionally." "$LINENO" 5
+fi
 if test -z "${GL_GENERATE_FNMATCH_H_TRUE}" && test -z "${GL_GENERATE_FNMATCH_H_FALSE}"; then
   as_fn_error "conditional \"GL_GENERATE_FNMATCH_H\" was never defined.
 Usually this means the macro was only invoked conditionally." "$LINENO" 5
diff --git a/gdb/gnulib/import/Makefile.am b/gdb/gnulib/import/Makefile.am
index efa828f..d628b3b 100644
--- a/gdb/gnulib/import/Makefile.am
+++ b/gdb/gnulib/import/Makefile.am
@@ -21,7 +21,7 @@
 # the same distribution terms as the rest of that program.
 #
 # Generated by gnulib-tool.
-# Reproduce by: gnulib-tool --import --dir=. --lib=libgnu --source-base=import --m4-base=import/m4 --doc-base=doc --tests-base=tests --aux-dir=import/extra --no-conditional-dependencies --no-libtool --macro-prefix=gl --no-vc-files fnmatch-gnu inttypes memmem update-copyright
+# Reproduce by: gnulib-tool --import --dir=. --lib=libgnu --source-base=import --m4-base=import/m4 --doc-base=doc --tests-base=tests --aux-dir=import/extra --no-conditional-dependencies --no-libtool --macro-prefix=gl --no-vc-files errno fnmatch-gnu inttypes memmem update-copyright
 
 AUTOMAKE_OPTIONS = 1.5 gnits
 
@@ -127,6 +127,40 @@ CLEANFILES += configmake.h configmake.h-t
 
 ## end   gnulib module configmake
 
+## begin gnulib module errno
+
+BUILT_SOURCES += $(ERRNO_H)
+
+# We need the following in order to create <errno.h> when the system
+# doesn't have one that is POSIX compliant.
+if GL_GENERATE_ERRNO_H
+errno.h: errno.in.h $(top_builddir)/config.status
+	$(AM_V_GEN)rm -f $@-t $@ && \
+	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */' && \
+	  sed -e 's|@''GUARD_PREFIX''@|GL|g' \
+	      -e 's|@''INCLUDE_NEXT''@|$(INCLUDE_NEXT)|g' \
+	      -e 's|@''PRAGMA_SYSTEM_HEADER''@|@PRAGMA_SYSTEM_HEADER@|g' \
+	      -e 's|@''PRAGMA_COLUMNS''@|@PRAGMA_COLUMNS@|g' \
+	      -e 's|@''NEXT_ERRNO_H''@|$(NEXT_ERRNO_H)|g' \
+	      -e 's|@''EMULTIHOP_HIDDEN''@|$(EMULTIHOP_HIDDEN)|g' \
+	      -e 's|@''EMULTIHOP_VALUE''@|$(EMULTIHOP_VALUE)|g' \
+	      -e 's|@''ENOLINK_HIDDEN''@|$(ENOLINK_HIDDEN)|g' \
+	      -e 's|@''ENOLINK_VALUE''@|$(ENOLINK_VALUE)|g' \
+	      -e 's|@''EOVERFLOW_HIDDEN''@|$(EOVERFLOW_HIDDEN)|g' \
+	      -e 's|@''EOVERFLOW_VALUE''@|$(EOVERFLOW_VALUE)|g' \
+	      < $(srcdir)/errno.in.h; \
+	} > $@-t && \
+	mv $@-t $@
+else
+errno.h: $(top_builddir)/config.status
+	rm -f $@
+endif
+MOSTLYCLEANFILES += errno.h errno.h-t
+
+EXTRA_DIST += errno.in.h
+
+## end   gnulib module errno
+
 ## begin gnulib module fnmatch
 
 BUILT_SOURCES += $(FNMATCH_H)
diff --git a/gdb/gnulib/import/Makefile.in b/gdb/gnulib/import/Makefile.in
index 7b396c1..28d5589 100644
--- a/gdb/gnulib/import/Makefile.in
+++ b/gdb/gnulib/import/Makefile.in
@@ -36,7 +36,7 @@
 # the same distribution terms as the rest of that program.
 #
 # Generated by gnulib-tool.
-# Reproduce by: gnulib-tool --import --dir=. --lib=libgnu --source-base=import --m4-base=import/m4 --doc-base=doc --tests-base=tests --aux-dir=import/extra --no-conditional-dependencies --no-libtool --macro-prefix=gl --no-vc-files fnmatch-gnu inttypes memmem update-copyright
+# Reproduce by: gnulib-tool --import --dir=. --lib=libgnu --source-base=import --m4-base=import/m4 --doc-base=doc --tests-base=tests --aux-dir=import/extra --no-conditional-dependencies --no-libtool --macro-prefix=gl --no-vc-files errno fnmatch-gnu inttypes memmem update-copyright
 
 
 
@@ -67,6 +67,7 @@ am__aclocal_m4_deps = $(top_srcdir)/import/m4/00gnulib.m4 \
 	$(top_srcdir)/import/m4/alloca.m4 \
 	$(top_srcdir)/import/m4/codeset.m4 \
 	$(top_srcdir)/import/m4/configmake.m4 \
+	$(top_srcdir)/import/m4/errno_h.m4 \
 	$(top_srcdir)/import/m4/extensions.m4 \
 	$(top_srcdir)/import/m4/extern-inline.m4 \
 	$(top_srcdir)/import/m4/fcntl-o.m4 \
@@ -194,6 +195,13 @@ ECHO_C = @ECHO_C@
 ECHO_N = @ECHO_N@
 ECHO_T = @ECHO_T@
 EGREP = @EGREP@
+EMULTIHOP_HIDDEN = @EMULTIHOP_HIDDEN@
+EMULTIHOP_VALUE = @EMULTIHOP_VALUE@
+ENOLINK_HIDDEN = @ENOLINK_HIDDEN@
+ENOLINK_VALUE = @ENOLINK_VALUE@
+EOVERFLOW_HIDDEN = @EOVERFLOW_HIDDEN@
+EOVERFLOW_VALUE = @EOVERFLOW_VALUE@
+ERRNO_H = @ERRNO_H@
 EXEEXT = @EXEEXT@
 FNMATCH_H = @FNMATCH_H@
 GLIBC21 = @GLIBC21@
@@ -391,12 +399,14 @@ LTLIBOBJS = @LTLIBOBJS@
 MAINT = @MAINT@
 MAKEINFO = @MAKEINFO@
 MKDIR_P = @MKDIR_P@
+NEXT_AS_FIRST_DIRECTIVE_ERRNO_H = @NEXT_AS_FIRST_DIRECTIVE_ERRNO_H@
 NEXT_AS_FIRST_DIRECTIVE_INTTYPES_H = @NEXT_AS_FIRST_DIRECTIVE_INTTYPES_H@
 NEXT_AS_FIRST_DIRECTIVE_STDDEF_H = @NEXT_AS_FIRST_DIRECTIVE_STDDEF_H@
 NEXT_AS_FIRST_DIRECTIVE_STDINT_H = @NEXT_AS_FIRST_DIRECTIVE_STDINT_H@
 NEXT_AS_FIRST_DIRECTIVE_STRING_H = @NEXT_AS_FIRST_DIRECTIVE_STRING_H@
 NEXT_AS_FIRST_DIRECTIVE_WCHAR_H = @NEXT_AS_FIRST_DIRECTIVE_WCHAR_H@
 NEXT_AS_FIRST_DIRECTIVE_WCTYPE_H = @NEXT_AS_FIRST_DIRECTIVE_WCTYPE_H@
+NEXT_ERRNO_H = @NEXT_ERRNO_H@
 NEXT_INTTYPES_H = @NEXT_INTTYPES_H@
 NEXT_STDDEF_H = @NEXT_STDDEF_H@
 NEXT_STDINT_H = @NEXT_STDINT_H@
@@ -529,11 +539,11 @@ SUBDIRS =
 noinst_HEADERS = 
 noinst_LIBRARIES = libgnu.a
 noinst_LTLIBRARIES = 
-EXTRA_DIST = m4/gnulib-cache.m4 alloca.c alloca.in.h fnmatch.c \
-	fnmatch.in.h fnmatch_loop.c inttypes.in.h config.charset \
-	ref-add.sin ref-del.sin mbrtowc.c mbsinit.c mbsrtowcs-impl.h \
-	mbsrtowcs-state.c mbsrtowcs.c memchr.c memchr.valgrind \
-	memmem.c str-two-way.h \
+EXTRA_DIST = m4/gnulib-cache.m4 alloca.c alloca.in.h errno.in.h \
+	fnmatch.c fnmatch.in.h fnmatch_loop.c inttypes.in.h \
+	config.charset ref-add.sin ref-del.sin mbrtowc.c mbsinit.c \
+	mbsrtowcs-impl.h mbsrtowcs-state.c mbsrtowcs.c memchr.c \
+	memchr.valgrind memmem.c str-two-way.h \
 	$(top_srcdir)/import/extra/snippet/arg-nonnull.h \
 	$(top_srcdir)/import/extra/snippet/c++defs.h \
 	$(top_srcdir)/import/extra/snippet/warn-on-use.h stdbool.in.h \
@@ -550,16 +560,16 @@ EXTRA_DIST = m4/gnulib-cache.m4 alloca.c alloca.in.h fnmatch.c \
 # statements but through direct file reference. Therefore this snippet must be
 # present in all Makefile.am that need it. This is ensured by the applicability
 # 'all' defined above.
-BUILT_SOURCES = $(ALLOCA_H) configmake.h $(FNMATCH_H) inttypes.h \
-	arg-nonnull.h c++defs.h warn-on-use.h $(STDBOOL_H) $(STDDEF_H) \
-	$(STDINT_H) string.h wchar.h wctype.h
+BUILT_SOURCES = $(ALLOCA_H) configmake.h $(ERRNO_H) $(FNMATCH_H) \
+	inttypes.h arg-nonnull.h c++defs.h warn-on-use.h $(STDBOOL_H) \
+	$(STDDEF_H) $(STDINT_H) string.h wchar.h wctype.h
 SUFFIXES = .sed .sin
-MOSTLYCLEANFILES = core *.stackdump alloca.h alloca.h-t fnmatch.h \
-	fnmatch.h-t inttypes.h inttypes.h-t arg-nonnull.h \
-	arg-nonnull.h-t c++defs.h c++defs.h-t warn-on-use.h \
-	warn-on-use.h-t stdbool.h stdbool.h-t stddef.h stddef.h-t \
-	stdint.h stdint.h-t string.h string.h-t wchar.h wchar.h-t \
-	wctype.h wctype.h-t
+MOSTLYCLEANFILES = core *.stackdump alloca.h alloca.h-t errno.h \
+	errno.h-t fnmatch.h fnmatch.h-t inttypes.h inttypes.h-t \
+	arg-nonnull.h arg-nonnull.h-t c++defs.h c++defs.h-t \
+	warn-on-use.h warn-on-use.h-t stdbool.h stdbool.h-t stddef.h \
+	stddef.h-t stdint.h stdint.h-t string.h string.h-t wchar.h \
+	wchar.h-t wctype.h wctype.h-t
 MOSTLYCLEANDIRS = 
 CLEANFILES = configmake.h configmake.h-t charset.alias ref-add.sed \
 	ref-del.sed
@@ -1033,6 +1043,28 @@ configmake.h: Makefile
 	} | sed '/""/d' > $@-t && \
 	mv -f $@-t $@
 
+# We need the following in order to create <errno.h> when the system
+# doesn't have one that is POSIX compliant.
+@GL_GENERATE_ERRNO_H_TRUE@errno.h: errno.in.h $(top_builddir)/config.status
+@GL_GENERATE_ERRNO_H_TRUE@	$(AM_V_GEN)rm -f $@-t $@ && \
+@GL_GENERATE_ERRNO_H_TRUE@	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */' && \
+@GL_GENERATE_ERRNO_H_TRUE@	  sed -e 's|@''GUARD_PREFIX''@|GL|g' \
+@GL_GENERATE_ERRNO_H_TRUE@	      -e 's|@''INCLUDE_NEXT''@|$(INCLUDE_NEXT)|g' \
+@GL_GENERATE_ERRNO_H_TRUE@	      -e 's|@''PRAGMA_SYSTEM_HEADER''@|@PRAGMA_SYSTEM_HEADER@|g' \
+@GL_GENERATE_ERRNO_H_TRUE@	      -e 's|@''PRAGMA_COLUMNS''@|@PRAGMA_COLUMNS@|g' \
+@GL_GENERATE_ERRNO_H_TRUE@	      -e 's|@''NEXT_ERRNO_H''@|$(NEXT_ERRNO_H)|g' \
+@GL_GENERATE_ERRNO_H_TRUE@	      -e 's|@''EMULTIHOP_HIDDEN''@|$(EMULTIHOP_HIDDEN)|g' \
+@GL_GENERATE_ERRNO_H_TRUE@	      -e 's|@''EMULTIHOP_VALUE''@|$(EMULTIHOP_VALUE)|g' \
+@GL_GENERATE_ERRNO_H_TRUE@	      -e 's|@''ENOLINK_HIDDEN''@|$(ENOLINK_HIDDEN)|g' \
+@GL_GENERATE_ERRNO_H_TRUE@	      -e 's|@''ENOLINK_VALUE''@|$(ENOLINK_VALUE)|g' \
+@GL_GENERATE_ERRNO_H_TRUE@	      -e 's|@''EOVERFLOW_HIDDEN''@|$(EOVERFLOW_HIDDEN)|g' \
+@GL_GENERATE_ERRNO_H_TRUE@	      -e 's|@''EOVERFLOW_VALUE''@|$(EOVERFLOW_VALUE)|g' \
+@GL_GENERATE_ERRNO_H_TRUE@	      < $(srcdir)/errno.in.h; \
+@GL_GENERATE_ERRNO_H_TRUE@	} > $@-t && \
+@GL_GENERATE_ERRNO_H_TRUE@	mv $@-t $@
+@GL_GENERATE_ERRNO_H_FALSE@errno.h: $(top_builddir)/config.status
+@GL_GENERATE_ERRNO_H_FALSE@	rm -f $@
+
 # We need the following in order to create <fnmatch.h> when the system
 # doesn't have one that supports the required API.
 @GL_GENERATE_FNMATCH_H_TRUE@fnmatch.h: fnmatch.in.h $(top_builddir)/config.status $(ARG_NONNULL_H)
diff --git a/gdb/gnulib/import/errno.in.h b/gdb/gnulib/import/errno.in.h
new file mode 100644
index 0000000..f9612c3
--- /dev/null
+++ b/gdb/gnulib/import/errno.in.h
@@ -0,0 +1,279 @@
+/* A POSIX-like <errno.h>.
+
+   Copyright (C) 2008-2012 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3, or (at your option)
+   any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, see <http://www.gnu.org/licenses/>.  */
+
+#ifndef _@GUARD_PREFIX@_ERRNO_H
+
+#if __GNUC__ >= 3
+@PRAGMA_SYSTEM_HEADER@
+#endif
+@PRAGMA_COLUMNS@
+
+/* The include_next requires a split double-inclusion guard.  */
+#@INCLUDE_NEXT@ @NEXT_ERRNO_H@
+
+#ifndef _@GUARD_PREFIX@_ERRNO_H
+#define _@GUARD_PREFIX@_ERRNO_H
+
+
+/* On native Windows platforms, many macros are not defined.  */
+# if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__
+
+/* These are the same values as defined by MSVC 10, for interoperability.  */
+
+#  ifndef ENOMSG
+#   define ENOMSG    122
+#   define GNULIB_defined_ENOMSG 1
+#  endif
+
+#  ifndef EIDRM
+#   define EIDRM     111
+#   define GNULIB_defined_EIDRM 1
+#  endif
+
+#  ifndef ENOLINK
+#   define ENOLINK   121
+#   define GNULIB_defined_ENOLINK 1
+#  endif
+
+#  ifndef EPROTO
+#   define EPROTO    134
+#   define GNULIB_defined_EPROTO 1
+#  endif
+
+#  ifndef EBADMSG
+#   define EBADMSG   104
+#   define GNULIB_defined_EBADMSG 1
+#  endif
+
+#  ifndef EOVERFLOW
+#   define EOVERFLOW 132
+#   define GNULIB_defined_EOVERFLOW 1
+#  endif
+
+#  ifndef ENOTSUP
+#   define ENOTSUP   129
+#   define GNULIB_defined_ENOTSUP 1
+#  endif
+
+#  ifndef ENETRESET
+#   define ENETRESET 117
+#   define GNULIB_defined_ENETRESET 1
+#  endif
+
+#  ifndef ECONNABORTED
+#   define ECONNABORTED 106
+#   define GNULIB_defined_ECONNABORTED 1
+#  endif
+
+#  ifndef ECANCELED
+#   define ECANCELED 105
+#   define GNULIB_defined_ECANCELED 1
+#  endif
+
+#  ifndef EOWNERDEAD
+#   define EOWNERDEAD 133
+#   define GNULIB_defined_EOWNERDEAD 1
+#  endif
+
+#  ifndef ENOTRECOVERABLE
+#   define ENOTRECOVERABLE 127
+#   define GNULIB_defined_ENOTRECOVERABLE 1
+#  endif
+
+#  ifndef EINPROGRESS
+#   define EINPROGRESS     112
+#   define EALREADY        103
+#   define ENOTSOCK        128
+#   define EDESTADDRREQ    109
+#   define EMSGSIZE        115
+#   define EPROTOTYPE      136
+#   define ENOPROTOOPT     123
+#   define EPROTONOSUPPORT 135
+#   define EOPNOTSUPP      130
+#   define EAFNOSUPPORT    102
+#   define EADDRINUSE      100
+#   define EADDRNOTAVAIL   101
+#   define ENETDOWN        116
+#   define ENETUNREACH     118
+#   define ECONNRESET      108
+#   define ENOBUFS         119
+#   define EISCONN         113
+#   define ENOTCONN        126
+#   define ETIMEDOUT       138
+#   define ECONNREFUSED    107
+#   define ELOOP           114
+#   define EHOSTUNREACH    110
+#   define EWOULDBLOCK     140
+#   define GNULIB_defined_ESOCK 1
+#  endif
+
+#  ifndef ETXTBSY
+#   define ETXTBSY         139
+#   define ENODATA         120  /* not required by POSIX */
+#   define ENOSR           124  /* not required by POSIX */
+#   define ENOSTR          125  /* not required by POSIX */
+#   define ETIME           137  /* not required by POSIX */
+#   define EOTHER          131  /* not required by POSIX */
+#   define GNULIB_defined_ESTREAMS 1
+#  endif
+
+/* These are intentionally the same values as the WSA* error numbers, defined
+   in <winsock2.h>.  */
+#  define ESOCKTNOSUPPORT 10044  /* not required by POSIX */
+#  define EPFNOSUPPORT    10046  /* not required by POSIX */
+#  define ESHUTDOWN       10058  /* not required by POSIX */
+#  define ETOOMANYREFS    10059  /* not required by POSIX */
+#  define EHOSTDOWN       10064  /* not required by POSIX */
+#  define EPROCLIM        10067  /* not required by POSIX */
+#  define EUSERS          10068  /* not required by POSIX */
+#  define EDQUOT          10069
+#  define ESTALE          10070
+#  define EREMOTE         10071  /* not required by POSIX */
+#  define GNULIB_defined_EWINSOCK 1
+
+# endif
+
+
+/* On OSF/1 5.1, when _XOPEN_SOURCE_EXTENDED is not defined, the macros
+   EMULTIHOP, ENOLINK, EOVERFLOW are not defined.  */
+# if @EMULTIHOP_HIDDEN@
+#  define EMULTIHOP @EMULTIHOP_VALUE@
+#  define GNULIB_defined_EMULTIHOP 1
+# endif
+# if @ENOLINK_HIDDEN@
+#  define ENOLINK   @ENOLINK_VALUE@
+#  define GNULIB_defined_ENOLINK 1
+# endif
+# if @EOVERFLOW_HIDDEN@
+#  define EOVERFLOW @EOVERFLOW_VALUE@
+#  define GNULIB_defined_EOVERFLOW 1
+# endif
+
+
+/* On OpenBSD 4.0 and on native Windows, the macros ENOMSG, EIDRM, ENOLINK,
+   EPROTO, EMULTIHOP, EBADMSG, EOVERFLOW, ENOTSUP, ECANCELED are not defined.
+   Likewise, on NonStop Kernel, EDQUOT is not defined.
+   Define them here.  Values >= 2000 seem safe to use: Solaris ESTALE = 151,
+   HP-UX EWOULDBLOCK = 246, IRIX EDQUOT = 1133.
+
+   Note: When one of these systems defines some of these macros some day,
+   binaries will have to be recompiled so that they recognizes the new
+   errno values from the system.  */
+
+# ifndef ENOMSG
+#  define ENOMSG    2000
+#  define GNULIB_defined_ENOMSG 1
+# endif
+
+# ifndef EIDRM
+#  define EIDRM     2001
+#  define GNULIB_defined_EIDRM 1
+# endif
+
+# ifndef ENOLINK
+#  define ENOLINK   2002
+#  define GNULIB_defined_ENOLINK 1
+# endif
+
+# ifndef EPROTO
+#  define EPROTO    2003
+#  define GNULIB_defined_EPROTO 1
+# endif
+
+# ifndef EMULTIHOP
+#  define EMULTIHOP 2004
+#  define GNULIB_defined_EMULTIHOP 1
+# endif
+
+# ifndef EBADMSG
+#  define EBADMSG   2005
+#  define GNULIB_defined_EBADMSG 1
+# endif
+
+# ifndef EOVERFLOW
+#  define EOVERFLOW 2006
+#  define GNULIB_defined_EOVERFLOW 1
+# endif
+
+# ifndef ENOTSUP
+#  define ENOTSUP   2007
+#  define GNULIB_defined_ENOTSUP 1
+# endif
+
+# ifndef ENETRESET
+#  define ENETRESET 2011
+#  define GNULIB_defined_ENETRESET 1
+# endif
+
+# ifndef ECONNABORTED
+#  define ECONNABORTED 2012
+#  define GNULIB_defined_ECONNABORTED 1
+# endif
+
+# ifndef ESTALE
+#  define ESTALE    2009
+#  define GNULIB_defined_ESTALE 1
+# endif
+
+# ifndef EDQUOT
+#  define EDQUOT 2010
+#  define GNULIB_defined_EDQUOT 1
+# endif
+
+# ifndef ECANCELED
+#  define ECANCELED 2008
+#  define GNULIB_defined_ECANCELED 1
+# endif
+
+/* On many platforms, the macros EOWNERDEAD and ENOTRECOVERABLE are not
+   defined.  */
+
+# ifndef EOWNERDEAD
+#  if defined __sun
+    /* Use the same values as defined for Solaris >= 8, for
+       interoperability.  */
+#   define EOWNERDEAD      58
+#   define ENOTRECOVERABLE 59
+#  elif (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__
+    /* We have a conflict here: pthreads-win32 defines these values
+       differently than MSVC 10.  It's hairy to decide which one to use.  */
+#   if defined __MINGW32__ && !defined USE_WINDOWS_THREADS
+     /* Use the same values as defined by pthreads-win32, for
+        interoperability.  */
+#    define EOWNERDEAD      43
+#    define ENOTRECOVERABLE 44
+#   else
+     /* Use the same values as defined by MSVC 10, for
+        interoperability.  */
+#    define EOWNERDEAD      133
+#    define ENOTRECOVERABLE 127
+#   endif
+#  else
+#   define EOWNERDEAD      2013
+#   define ENOTRECOVERABLE 2014
+#  endif
+#  define GNULIB_defined_EOWNERDEAD 1
+#  define GNULIB_defined_ENOTRECOVERABLE 1
+# endif
+
+# ifndef EILSEQ
+#  define EILSEQ 2015
+#  define GNULIB_defined_EILSEQ 1
+# endif
+
+#endif /* _@GUARD_PREFIX@_ERRNO_H */
+#endif /* _@GUARD_PREFIX@_ERRNO_H */
diff --git a/gdb/gnulib/import/m4/errno_h.m4 b/gdb/gnulib/import/m4/errno_h.m4
new file mode 100644
index 0000000..4e33ba8
--- /dev/null
+++ b/gdb/gnulib/import/m4/errno_h.m4
@@ -0,0 +1,137 @@
+# errno_h.m4 serial 12
+dnl Copyright (C) 2004, 2006, 2008-2012 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN_ONCE([gl_HEADER_ERRNO_H],
+[
+  AC_REQUIRE([AC_PROG_CC])
+  AC_CACHE_CHECK([for complete errno.h], [gl_cv_header_errno_h_complete], [
+    AC_EGREP_CPP([booboo],[
+#include <errno.h>
+#if !defined ETXTBSY
+booboo
+#endif
+#if !defined ENOMSG
+booboo
+#endif
+#if !defined EIDRM
+booboo
+#endif
+#if !defined ENOLINK
+booboo
+#endif
+#if !defined EPROTO
+booboo
+#endif
+#if !defined EMULTIHOP
+booboo
+#endif
+#if !defined EBADMSG
+booboo
+#endif
+#if !defined EOVERFLOW
+booboo
+#endif
+#if !defined ENOTSUP
+booboo
+#endif
+#if !defined ENETRESET
+booboo
+#endif
+#if !defined ECONNABORTED
+booboo
+#endif
+#if !defined ESTALE
+booboo
+#endif
+#if !defined EDQUOT
+booboo
+#endif
+#if !defined ECANCELED
+booboo
+#endif
+#if !defined EOWNERDEAD
+booboo
+#endif
+#if !defined ENOTRECOVERABLE
+booboo
+#endif
+#if !defined EILSEQ
+booboo
+#endif
+      ],
+      [gl_cv_header_errno_h_complete=no],
+      [gl_cv_header_errno_h_complete=yes])
+  ])
+  if test $gl_cv_header_errno_h_complete = yes; then
+    ERRNO_H=''
+  else
+    gl_NEXT_HEADERS([errno.h])
+    ERRNO_H='errno.h'
+  fi
+  AC_SUBST([ERRNO_H])
+  AM_CONDITIONAL([GL_GENERATE_ERRNO_H], [test -n "$ERRNO_H"])
+  gl_REPLACE_ERRNO_VALUE([EMULTIHOP])
+  gl_REPLACE_ERRNO_VALUE([ENOLINK])
+  gl_REPLACE_ERRNO_VALUE([EOVERFLOW])
+])
+
+# Assuming $1 = EOVERFLOW.
+# The EOVERFLOW errno value ought to be defined in <errno.h>, according to
+# POSIX.  But some systems (like OpenBSD 4.0 or AIX 3) don't define it, and
+# some systems (like OSF/1) define it when _XOPEN_SOURCE_EXTENDED is defined.
+# Check for the value of EOVERFLOW.
+# Set the variables EOVERFLOW_HIDDEN and EOVERFLOW_VALUE.
+AC_DEFUN([gl_REPLACE_ERRNO_VALUE],
+[
+  if test -n "$ERRNO_H"; then
+    AC_CACHE_CHECK([for ]$1[ value], [gl_cv_header_errno_h_]$1, [
+      AC_EGREP_CPP([yes],[
+#include <errno.h>
+#ifdef ]$1[
+yes
+#endif
+      ],
+      [gl_cv_header_errno_h_]$1[=yes],
+      [gl_cv_header_errno_h_]$1[=no])
+      if test $gl_cv_header_errno_h_]$1[ = no; then
+        AC_EGREP_CPP([yes],[
+#define _XOPEN_SOURCE_EXTENDED 1
+#include <errno.h>
+#ifdef ]$1[
+yes
+#endif
+          ], [gl_cv_header_errno_h_]$1[=hidden])
+        if test $gl_cv_header_errno_h_]$1[ = hidden; then
+          dnl The macro exists but is hidden.
+          dnl Define it to the same value.
+          AC_COMPUTE_INT([gl_cv_header_errno_h_]$1, $1, [
+#define _XOPEN_SOURCE_EXTENDED 1
+#include <errno.h>
+/* The following two lines are a workaround against an autoconf-2.52 bug.  */
+#include <stdio.h>
+#include <stdlib.h>
+])
+        fi
+      fi
+    ])
+    case $gl_cv_header_errno_h_]$1[ in
+      yes | no)
+        ]$1[_HIDDEN=0; ]$1[_VALUE=
+        ;;
+      *)
+        ]$1[_HIDDEN=1; ]$1[_VALUE="$gl_cv_header_errno_h_]$1["
+        ;;
+    esac
+    AC_SUBST($1[_HIDDEN])
+    AC_SUBST($1[_VALUE])
+  fi
+])
+
+dnl Autoconf >= 2.61 has AC_COMPUTE_INT built-in.
+dnl Remove this when we can assume autoconf >= 2.61.
+m4_ifdef([AC_COMPUTE_INT], [], [
+  AC_DEFUN([AC_COMPUTE_INT], [_AC_COMPUTE_INT([$2],[$1],[$3],[$4])])
+])
diff --git a/gdb/gnulib/import/m4/gnulib-cache.m4 b/gdb/gnulib/import/m4/gnulib-cache.m4
index 22e6796..6110017 100644
--- a/gdb/gnulib/import/m4/gnulib-cache.m4
+++ b/gdb/gnulib/import/m4/gnulib-cache.m4
@@ -27,11 +27,12 @@
 
 
 # Specification in the form of a command-line invocation:
-#   gnulib-tool --import --dir=. --lib=libgnu --source-base=import --m4-base=import/m4 --doc-base=doc --tests-base=tests --aux-dir=import/extra --no-conditional-dependencies --no-libtool --macro-prefix=gl --no-vc-files fnmatch-gnu inttypes memmem update-copyright
+#   gnulib-tool --import --dir=. --lib=libgnu --source-base=import --m4-base=import/m4 --doc-base=doc --tests-base=tests --aux-dir=import/extra --no-conditional-dependencies --no-libtool --macro-prefix=gl --no-vc-files errno fnmatch-gnu inttypes memmem update-copyright
 
 # Specification in the form of a few gnulib-tool.m4 macro invocations:
 gl_LOCAL_DIR([])
 gl_MODULES([
+  errno
   fnmatch-gnu
   inttypes
   memmem
diff --git a/gdb/gnulib/import/m4/gnulib-comp.m4 b/gdb/gnulib/import/m4/gnulib-comp.m4
index 6d0b35b..f0ba256 100644
--- a/gdb/gnulib/import/m4/gnulib-comp.m4
+++ b/gdb/gnulib/import/m4/gnulib-comp.m4
@@ -41,6 +41,7 @@ AC_DEFUN([gl_EARLY],
   # Code from module alloca:
   # Code from module alloca-opt:
   # Code from module configmake:
+  # Code from module errno:
   # Code from module extensions:
   AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
   # Code from module extern-inline:
@@ -90,6 +91,7 @@ AC_DEFUN([gl_INIT],
   gl_source_base='import'
   gl_FUNC_ALLOCA
   gl_CONFIGMAKE_PREP
+  gl_HEADER_ERRNO_H
   AC_REQUIRE([gl_EXTERN_INLINE])
   gl_FUNC_FNMATCH_POSIX
   if test -n "$FNMATCH_H"; then
@@ -294,6 +296,7 @@ AC_DEFUN([gl_FILE_LIST], [
   lib/alloca.c
   lib/alloca.in.h
   lib/config.charset
+  lib/errno.in.h
   lib/fnmatch.c
   lib/fnmatch.in.h
   lib/fnmatch_loop.c
@@ -326,6 +329,7 @@ AC_DEFUN([gl_FILE_LIST], [
   m4/alloca.m4
   m4/codeset.m4
   m4/configmake.m4
+  m4/errno_h.m4
   m4/extensions.m4
   m4/extern-inline.m4
   m4/fcntl-o.m4
diff --git a/gdb/gnulib/update-gnulib.sh b/gdb/gnulib/update-gnulib.sh
index a99bad8..e616147 100644
--- a/gdb/gnulib/update-gnulib.sh
+++ b/gdb/gnulib/update-gnulib.sh
@@ -29,7 +29,8 @@
 #     regenerate the various scripts and Makefiles are on the PATH.
 
 # The list of gnulib modules we are importing in GDB.
-IMPORTED_GNULIB_MODULES="fnmatch-gnu inttypes memmem update-copyright"
+IMPORTED_GNULIB_MODULES="fnmatch-gnu inttypes memmem update-copyright \
+			 errno"
 
 # The gnulib commit ID to use for the update.
 GNULIB_COMMIT_SHA1="8d5bd1402003bd0153984b138735adf537d960b0"