+2014-08-07  Gary Benson  <gbenson@redhat.com>
+
+       * common/common-defs.h: Include errno.h.
+       * defs.h: Do not include errno.h.
+       * ada-typeprint.c: Likewise.
+       * c-typeprint.c: Likewise.
+       * core-regset.c: Likewise.
+       * corefile.c: Likewise.
+       * corelow.c: Likewise.
+       * event-loop.c: Likewise.
+       * f-typeprint.c: Likewise.
+       * gnu-nat.c: Likewise.
+       * go32-nat.c: Likewise.
+       * i386gnu-nat.c: Likewise.
+       * m2-typeprint.c: Likewise.
+       * nat/linux-btrace.c: Likewise.
+       * p-typeprint.c: Likewise.
+       * procfs.c: Likewise.
+       * remote-sim.c: Likewise.
+       * rs6000-nat.c: Likewise.
+       * target.c: Likewise.
+       * typeprint.c: Likewise.
+       * ui-file.c: Likewise.
+       * valops.c: Likewise.
+       * valprint.c: Likewise.
+
 2014-08-07  Gary Benson  <gbenson@redhat.com>
 
        * common/common-defs.h: Include string.h.
 
 #include "c-lang.h"
 #include "typeprint.h"
 #include "ada-lang.h"
-
 #include <ctype.h>
-#include <errno.h>
 
 static int print_selected_record_field_types (struct type *, struct type *,
                                              int, int,
 
 #include "typeprint.h"
 #include "cp-abi.h"
 #include "jv-lang.h"
-#include <errno.h>
 #include "cp-support.h"
 
 static void c_type_print_varspec_prefix (struct type *,
 
 #include <stdarg.h>
 #include <stddef.h>
 #include <string.h>
+#include <errno.h>
 #include "ansidecl.h"
 #include "libiberty.h"
 #include "pathmax.h"
 
 #include "regcache.h"
 
 #include <fcntl.h>
-#include <errno.h>
 #include <time.h>
 #ifdef HAVE_SYS_PROCFS_H
 #include <sys/procfs.h>
 
    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
 #include "defs.h"
-#include <errno.h>
 #include <signal.h>
 #include <fcntl.h>
 #include "inferior.h"
 
 
 #include "defs.h"
 #include "arch-utils.h"
-#include <errno.h>
 #include <signal.h>
 #include <fcntl.h>
 #ifdef HAVE_SYS_FILE_H
 
 #include "common-defs.h"
 
 #include <sys/types.h>
-#include <errno.h>             /* System call error return status.  */
 #include <limits.h>
 #include <stdint.h>
 
 
 #endif
 
 #include <sys/types.h>
-#include <errno.h>
 #include <sys/time.h>
 #include "exceptions.h"
 #include "gdb_select.h"
 
 #include "gdbcore.h"
 #include "target.h"
 #include "f-lang.h"
-#include <errno.h>
 
 #if 0                          /* Currently unused.  */
 static void f_type_print_args (struct type *, struct ui_file *);
 
+2014-08-07  Gary Benson  <gbenson@redhat.com>
+
+       * configure.ac (AC_CHECK_HEADERS): Remove errno.h.
+       * configure: Regenerate.
+       * config.in: Likewise.
+       * server.h: Do not include errno.h.
+       * event-loop.c: Likewise.
+       * hostio-errno.c: Likewise.
+       * linux-low.c: Likewise.
+       * remote-utils.c: Likewise.
+       * spu-low.c: Likewise.
+       * utils.c: Likewise.
+       * gdbreplay.c: Unconditionally include errno.h.
+
 2014-08-07  Gary Benson  <gbenson@redhat.com>
 
        * server.h: Do not include string.h.
 
 /* Define if <sys/procfs.h> has elf_fpregset_t. */
 #undef HAVE_ELF_FPREGSET_T
 
-/* Define to 1 if you have the <errno.h> header file. */
-#undef HAVE_ERRNO_H
-
 /* Define to 1 if you have the <fcntl.h> header file. */
 #undef HAVE_FCNTL_H
 
 
   cd "$ac_popdir"
 
 
-for ac_header in sgtty.h termio.h termios.h sys/reg.h string.h                  proc_service.h sys/procfs.h linux/elf.h                 errno.h fcntl.h signal.h sys/file.h malloc.h            sys/ioctl.h netinet/in.h sys/socket.h netdb.h           netinet/tcp.h arpa/inet.h
+for ac_header in sgtty.h termio.h termios.h sys/reg.h string.h                  proc_service.h sys/procfs.h linux/elf.h                 fcntl.h signal.h sys/file.h malloc.h            sys/ioctl.h netinet/in.h sys/socket.h netdb.h           netinet/tcp.h arpa/inet.h
 do :
   as_ac_Header=`$as_echo "ac_cv_header_$ac_header" | $as_tr_sh`
 ac_fn_c_check_header_mongrel "$LINENO" "$ac_header" "$as_ac_Header" "$ac_includes_default"
 
 
 AC_CHECK_HEADERS(sgtty.h termio.h termios.h sys/reg.h string.h dnl
                 proc_service.h sys/procfs.h linux/elf.h dnl
-                errno.h fcntl.h signal.h sys/file.h malloc.h dnl
+                fcntl.h signal.h sys/file.h malloc.h dnl
                 sys/ioctl.h netinet/in.h sys/socket.h netdb.h dnl
                 netinet/tcp.h arpa/inet.h)
 AC_CHECK_FUNCS(pread pwrite pread64 readlink)
 
 #include <io.h>
 #endif
 
-#ifdef HAVE_ERRNO_H
-#include <errno.h>
-#endif
-
 #include <unistd.h>
 
 typedef struct gdb_event gdb_event;
 
 #if HAVE_FCNTL_H
 #include <fcntl.h>
 #endif
-#if HAVE_ERRNO_H
 #include <errno.h>
-#endif
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
 
    on top of errno.  */
 
 #include "server.h"
-#include <errno.h>
 #include "gdb/fileio.h"
 
 static int
 
 #include <sys/ioctl.h>
 #include <fcntl.h>
 #include <unistd.h>
-#include <errno.h>
 #include <sys/syscall.h>
 #include <sched.h>
 #include <ctype.h>
 
 #include <arpa/inet.h>
 #endif
 #include <sys/stat.h>
-#if HAVE_ERRNO_H
-#include <errno.h>
-#endif
 
 #if USE_WIN32API
 #include <winsock2.h>
 
 
 #include "version.h"
 
-#ifdef HAVE_ERRNO_H
-#include <errno.h>
-#endif
 #include <setjmp.h>
 
 #ifdef HAVE_ALLOCA_H
 
 #include <sys/ptrace.h>
 #include <fcntl.h>
 #include <unistd.h>
-#include <errno.h>
 #include <sys/syscall.h>
 #include "filestuff.h"
 #include "hostio.h"
 
    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
 #include "server.h"
-#if HAVE_ERRNO_H
-#include <errno.h>
-#endif
 
 #ifdef IN_PROCESS_AGENT
 #  define PREFIX "ipa: "
 
 #include "defs.h"
 
 #include <ctype.h>
-#include <errno.h>
 #include <limits.h>
 #include <setjmp.h>
 #include <signal.h>
 
 #include "inf-child.h"
 
 #include <ctype.h>
-#include <errno.h>
 #include <unistd.h>
 #include <sys/utsname.h>
 #include <io.h>
 
 #include "floatformat.h"
 #include "regcache.h"
 
-#include <errno.h>
 #include <mach.h>
 #include <mach_error.h>
 #include <mach/message.h>
 
 #include "c-lang.h"
 #include "typeprint.h"
 #include "cp-abi.h"
-#include <errno.h>
 
 static void m2_print_bounds (struct type *type,
                             struct ui_file *stream, int show, int level,
 
 
 #if HAVE_LINUX_PERF_EVENT_H && defined(SYS_perf_event_open)
 
-#include <errno.h>
 #include <stdint.h>
 #include <unistd.h>
 #include <sys/mman.h>
 
 #include "p-lang.h"
 #include "typeprint.h"
 #include "gdb-demangle.h"
-#include <errno.h>
 #include <ctype.h>
 
 static void pascal_type_print_varspec_suffix (struct type *, struct ui_file *,
 
 #ifdef HAVE_SYS_SYSCALL_H
 #include <sys/syscall.h>
 #endif
-#include <sys/errno.h>
 #include "gdb_wait.h"
 #include <signal.h>
 #include <ctype.h>
 
 #include <fcntl.h>
 #include <signal.h>
 #include <setjmp.h>
-#include <errno.h>
 #include "terminal.h"
 #include "target.h"
 #include "gdbcore.h"
 
 #include <signal.h>
 #include <sys/ioctl.h>
 #include <fcntl.h>
-#include <errno.h>
 
 #include <a.out.h>
 #include <sys/file.h>
 
    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
 #include "defs.h"
-#include <errno.h>
 #include "target.h"
 #include "target-dcache.h"
 #include "gdbcmd.h"
 
 #include "typeprint.h"
 #include "exceptions.h"
 #include "valprint.h"
-#include <errno.h>
 #include <ctype.h>
 #include "cli/cli-utils.h"
 #include "extension.h"
 
 #include "gdb_select.h"
 #include "filestuff.h"
 
-#include <errno.h>
-
 static ui_file_isatty_ftype null_file_isatty;
 static ui_file_write_ftype null_file_write;
 static ui_file_write_ftype null_file_write_async_safe;
 
 #include "cp-support.h"
 #include "dfp.h"
 #include "tracepoint.h"
-#include <errno.h>
 #include "observer.h"
 #include "objfiles.h"
 #include "exceptions.h"
 
 #include "charset.h"
 #include <ctype.h>
 
-#include <errno.h>
-
 /* Maximum number of wchars returned from wchar_iterate.  */
 #define MAX_WCHARS 4