Remove some configure header-file checks that we weren't really using.

We had some AC_CHECK_HEADER tests that were really wastes of cycles,
because the code proceeded to #include those headers unconditionally
anyway, in all or a large majority of cases.  The lack of complaints
shows that those headers are available on every platform of interest,
so we might as well let configure run a bit faster by not probing
those headers at all.

I suspect that some of the tests I left alone are equally useless, but
since all the existing #includes of the remaining headers are properly
guarded, I didn't touch them.

config/ac_func_accept_argtypes.m4

@@ -14,9 +14,6 @@ dnl       #define ACCEPT_TYPE_ARG1 int
 dnl       #define ACCEPT_TYPE_ARG2 struct sockaddr *
 dnl       #define ACCEPT_TYPE_ARG3 socklen_t
 dnl
-dnl This macro requires AC_CHECK_HEADERS to have already verified the
-dnl presence or absence of sys/types.h and sys/socket.h.
-dnl
 dnl NOTE: This is just a modified version of the AC_FUNC_SELECT_ARGTYPES
 dnl macro. Credit for that one goes to David MacKenzie et. al.
 dnl
@@ -51,12 +48,8 @@ AC_DEFUN([AC_FUNC_ACCEPT_ARGTYPES],
        for ac_cv_func_accept_arg2 in 'struct sockaddr *' 'const struct sockaddr *' 'void *'; do
         for ac_cv_func_accept_arg3 in 'int' 'size_t' 'socklen_t' 'unsigned int' 'void'; do
          AC_COMPILE_IFELSE([AC_LANG_SOURCE(
-[#ifdef HAVE_SYS_TYPES_H
-#include <sys/types.h>
-#endif
-#ifdef HAVE_SYS_SOCKET_H
+[#include <sys/types.h>
 #include <sys/socket.h>
-#endif
 extern $ac_cv_func_accept_return accept ($ac_cv_func_accept_arg1, $ac_cv_func_accept_arg2, $ac_cv_func_accept_arg3 *);])],
          [ac_not_found=no; break 4], [ac_not_found=yes])
        done

config/c-library.m4

@@ -111,8 +111,12 @@ fi
 AC_DEFUN([PGAC_UNION_SEMUN],
 [AC_CHECK_TYPES([union semun], [], [],
 [#include <sys/types.h>
+#ifdef HAVE_SYS_IPC_H
 #include <sys/ipc.h>
-#include <sys/sem.h>])])# PGAC_UNION_SEMUN
+#endif
+#ifdef HAVE_SYS_SEM_H
+#include <sys/sem.h>
+#endif])])# PGAC_UNION_SEMUN
 
 
 # PGAC_STRUCT_SOCKADDR_UN
@@ -135,9 +139,7 @@ AC_DEFUN([PGAC_STRUCT_SOCKADDR_UN],
 AC_DEFUN([PGAC_STRUCT_SOCKADDR_STORAGE],
 [AC_CHECK_TYPES([struct sockaddr_storage], [], [],
 [#include <sys/types.h>
-#ifdef HAVE_SYS_SOCKET_H
 #include <sys/socket.h>
-#endif
 ])])# PGAC_STRUCT_SOCKADDR_STORAGE
 
 # PGAC_STRUCT_SOCKADDR_STORAGE_MEMBERS
@@ -154,9 +156,7 @@ AC_DEFUN([PGAC_STRUCT_SOCKADDR_STORAGE_MEMBERS],
 		   struct sockaddr_storage.__ss_len,
 		   struct sockaddr.sa_len], [], [],
 [#include <sys/types.h>
-#ifdef HAVE_SYS_SOCKET_H
 #include <sys/socket.h>
-#endif
 ])])# PGAC_STRUCT_SOCKADDR_STORAGE_MEMBERS
 
 

configure

@@ -10332,7 +10332,7 @@ fi
 ## Header files
 ##
 
-for ac_header in atomic.h crypt.h dld.h fp_class.h getopt.h ieeefp.h ifaddrs.h langinfo.h mbarrier.h poll.h pwd.h sys/epoll.h sys/ioctl.h sys/ipc.h sys/poll.h sys/pstat.h sys/resource.h sys/select.h sys/sem.h sys/shm.h sys/socket.h sys/sockio.h sys/tas.h sys/time.h sys/un.h termios.h ucred.h utime.h wchar.h wctype.h
+for ac_header in atomic.h crypt.h dld.h fp_class.h getopt.h ieeefp.h ifaddrs.h langinfo.h mbarrier.h poll.h sys/epoll.h sys/ipc.h sys/poll.h sys/pstat.h sys/resource.h sys/select.h sys/sem.h sys/shm.h sys/sockio.h sys/tas.h sys/un.h termios.h ucred.h utime.h wchar.h wctype.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" "$ac_includes_default"
@@ -10351,9 +10351,7 @@ done
 for ac_header in net/if.h
 do :
   ac_fn_c_check_header_compile "$LINENO" "net/if.h" "ac_cv_header_net_if_h" "$ac_includes_default
-#ifdef HAVE_SYS_SOCKET_H
 #include <sys/socket.h>
-#endif
 
 "
 if test "x$ac_cv_header_net_if_h" = xyes; then :
@@ -10386,24 +10384,10 @@ done
 
 # At least on IRIX, test for netinet/tcp.h will fail unless
 # netinet/in.h is included first.
-for ac_header in netinet/in.h
-do :
-  ac_fn_c_check_header_mongrel "$LINENO" "netinet/in.h" "ac_cv_header_netinet_in_h" "$ac_includes_default"
-if test "x$ac_cv_header_netinet_in_h" = xyes; then :
-  cat >>confdefs.h <<_ACEOF
-#define HAVE_NETINET_IN_H 1
-_ACEOF
-
-fi
-
-done
-
 for ac_header in netinet/tcp.h
 do :
   ac_fn_c_check_header_compile "$LINENO" "netinet/tcp.h" "ac_cv_header_netinet_tcp_h" "$ac_includes_default
-#ifdef HAVE_NETINET_IN_H
 #include <netinet/in.h>
-#endif
 
 "
 if test "x$ac_cv_header_netinet_tcp_h" = xyes; then :
@@ -11671,8 +11655,12 @@ $as_echo "#define HAVE_TZNAME 1" >>confdefs.h
 fi
 
 ac_fn_c_check_type "$LINENO" "union semun" "ac_cv_type_union_semun" "#include <sys/types.h>
+#ifdef HAVE_SYS_IPC_H
 #include <sys/ipc.h>
+#endif
+#ifdef HAVE_SYS_SEM_H
 #include <sys/sem.h>
+#endif
 "
 if test "x$ac_cv_type_union_semun" = xyes; then :
 
@@ -11696,9 +11684,7 @@ $as_echo "#define HAVE_UNIX_SOCKETS 1" >>confdefs.h
 fi
 
 ac_fn_c_check_type "$LINENO" "struct sockaddr_storage" "ac_cv_type_struct_sockaddr_storage" "#include <sys/types.h>
-#ifdef HAVE_SYS_SOCKET_H
 #include <sys/socket.h>
-#endif
 
 "
 if test "x$ac_cv_type_struct_sockaddr_storage" = xyes; then :
@@ -11711,9 +11697,7 @@ _ACEOF
 fi
 
 ac_fn_c_check_member "$LINENO" "struct sockaddr_storage" "ss_family" "ac_cv_member_struct_sockaddr_storage_ss_family" "#include <sys/types.h>
-#ifdef HAVE_SYS_SOCKET_H
 #include <sys/socket.h>
-#endif
 
 "
 if test "x$ac_cv_member_struct_sockaddr_storage_ss_family" = xyes; then :
@@ -11725,9 +11709,7 @@ _ACEOF
 
 fi
 ac_fn_c_check_member "$LINENO" "struct sockaddr_storage" "__ss_family" "ac_cv_member_struct_sockaddr_storage___ss_family" "#include <sys/types.h>
-#ifdef HAVE_SYS_SOCKET_H
 #include <sys/socket.h>
-#endif
 
 "
 if test "x$ac_cv_member_struct_sockaddr_storage___ss_family" = xyes; then :
@@ -11739,9 +11721,7 @@ _ACEOF
 
 fi
 ac_fn_c_check_member "$LINENO" "struct sockaddr_storage" "ss_len" "ac_cv_member_struct_sockaddr_storage_ss_len" "#include <sys/types.h>
-#ifdef HAVE_SYS_SOCKET_H
 #include <sys/socket.h>
-#endif
 
 "
 if test "x$ac_cv_member_struct_sockaddr_storage_ss_len" = xyes; then :
@@ -11753,9 +11733,7 @@ _ACEOF
 
 fi
 ac_fn_c_check_member "$LINENO" "struct sockaddr_storage" "__ss_len" "ac_cv_member_struct_sockaddr_storage___ss_len" "#include <sys/types.h>
-#ifdef HAVE_SYS_SOCKET_H
 #include <sys/socket.h>
-#endif
 
 "
 if test "x$ac_cv_member_struct_sockaddr_storage___ss_len" = xyes; then :
@@ -11767,9 +11745,7 @@ _ACEOF
 
 fi
 ac_fn_c_check_member "$LINENO" "struct sockaddr" "sa_len" "ac_cv_member_struct_sockaddr_sa_len" "#include <sys/types.h>
-#ifdef HAVE_SYS_SOCKET_H
 #include <sys/socket.h>
-#endif
 
 "
 if test "x$ac_cv_member_struct_sockaddr_sa_len" = xyes; then :
@@ -12427,12 +12403,8 @@ else
         for ac_cv_func_accept_arg3 in 'int' 'size_t' 'socklen_t' 'unsigned int' 'void'; do
          cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
-#ifdef HAVE_SYS_TYPES_H
 #include <sys/types.h>
-#endif
-#ifdef HAVE_SYS_SOCKET_H
 #include <sys/socket.h>
-#endif
 extern $ac_cv_func_accept_return accept ($ac_cv_func_accept_arg1, $ac_cv_func_accept_arg2, $ac_cv_func_accept_arg3 *);
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"; then :

configure.in

@@ -1162,16 +1162,13 @@ AC_SUBST(UUID_LIBS)
 ## Header files
 ##
 
-dnl sys/socket.h is required by AC_FUNC_ACCEPT_ARGTYPES
-AC_CHECK_HEADERS([atomic.h crypt.h dld.h fp_class.h getopt.h ieeefp.h ifaddrs.h langinfo.h mbarrier.h poll.h pwd.h sys/epoll.h sys/ioctl.h sys/ipc.h sys/poll.h sys/pstat.h sys/resource.h sys/select.h sys/sem.h sys/shm.h sys/socket.h sys/sockio.h sys/tas.h sys/time.h sys/un.h termios.h ucred.h utime.h wchar.h wctype.h])
+AC_CHECK_HEADERS([atomic.h crypt.h dld.h fp_class.h getopt.h ieeefp.h ifaddrs.h langinfo.h mbarrier.h poll.h sys/epoll.h sys/ipc.h sys/poll.h sys/pstat.h sys/resource.h sys/select.h sys/sem.h sys/shm.h sys/sockio.h sys/tas.h sys/un.h termios.h ucred.h utime.h wchar.h wctype.h])
 
 # On BSD, test for net/if.h will fail unless sys/socket.h
 # is included first.
 AC_CHECK_HEADERS(net/if.h, [], [],
 [AC_INCLUDES_DEFAULT
-#ifdef HAVE_SYS_SOCKET_H
 #include <sys/socket.h>
-#endif
 ])
 
 # On OpenBSD, test for sys/ucred.h will fail unless sys/param.h
@@ -1183,12 +1180,9 @@ AC_CHECK_HEADERS(sys/ucred.h, [], [],
 
 # At least on IRIX, test for netinet/tcp.h will fail unless
 # netinet/in.h is included first.
-AC_CHECK_HEADERS(netinet/in.h)
 AC_CHECK_HEADERS(netinet/tcp.h, [], [],
 [AC_INCLUDES_DEFAULT
-#ifdef HAVE_NETINET_IN_H
 #include <netinet/in.h>
-#endif
 ])
 
 if expr x"$pgac_cv_check_readline" : 'x-lreadline' >/dev/null ; then

src/backend/libpq/ifaddr.c

@@ -322,9 +322,7 @@ pg_foreach_ifaddr(PgIfAddrCallback callback, void *cb_data)
 }
 #else							/* !HAVE_GETIFADDRS && !WIN32 */
 
-#ifdef HAVE_SYS_IOCTL_H
 #include <sys/ioctl.h>
-#endif
 
 #ifdef HAVE_NET_IF_H
 #include <net/if.h>

src/bin/psql/command.c

@@ -14,9 +14,7 @@
 
 #include <ctype.h>
 #include <time.h>
-#ifdef HAVE_PWD_H
 #include <pwd.h>
-#endif
 #ifndef WIN32
 #include <sys/stat.h>			/* for stat() */
 #include <fcntl.h>				/* open() flags */

src/include/libpq/libpq-be.h

@@ -18,9 +18,7 @@
 #ifndef LIBPQ_BE_H
 #define LIBPQ_BE_H
 
-#ifdef HAVE_SYS_TIME_H
 #include <sys/time.h>
-#endif
 #ifdef USE_OPENSSL
 #include <openssl/ssl.h>
 #include <openssl/err.h>

src/include/pg_config.h.in

@@ -370,9 +370,6 @@
 /* Define to 1 if you have the `mkdtemp' function. */
 #undef HAVE_MKDTEMP
 
-/* Define to 1 if you have the <netinet/in.h> header file. */
-#undef HAVE_NETINET_IN_H
-
 /* Define to 1 if you have the <netinet/tcp.h> header file. */
 #undef HAVE_NETINET_TCP_H
 
@@ -415,9 +412,6 @@
 /* Have PTHREAD_PRIO_INHERIT. */
 #undef HAVE_PTHREAD_PRIO_INHERIT
 
-/* Define to 1 if you have the <pwd.h> header file. */
-#undef HAVE_PWD_H
-
 /* Define to 1 if you have the `random' function. */
 #undef HAVE_RANDOM
 
@@ -557,9 +551,6 @@
 /* Define to 1 if you have the <sys/epoll.h> header file. */
 #undef HAVE_SYS_EPOLL_H
 
-/* Define to 1 if you have the <sys/ioctl.h> header file. */
-#undef HAVE_SYS_IOCTL_H
-
 /* Define to 1 if you have the <sys/ipc.h> header file. */
 #undef HAVE_SYS_IPC_H
 
@@ -581,9 +572,6 @@
 /* Define to 1 if you have the <sys/shm.h> header file. */
 #undef HAVE_SYS_SHM_H
 
-/* Define to 1 if you have the <sys/socket.h> header file. */
-#undef HAVE_SYS_SOCKET_H
-
 /* Define to 1 if you have the <sys/sockio.h> header file. */
 #undef HAVE_SYS_SOCKIO_H
 
@@ -593,9 +581,6 @@
 /* Define to 1 if you have the <sys/tas.h> header file. */
 #undef HAVE_SYS_TAS_H
 
-/* Define to 1 if you have the <sys/time.h> header file. */
-#undef HAVE_SYS_TIME_H
-
 /* Define to 1 if you have the <sys/types.h> header file. */
 #undef HAVE_SYS_TYPES_H
 

src/include/pg_config.h.win32

@@ -252,9 +252,6 @@
 /* Define to 1 if you have the `mkdtemp' function. */
 /* #undef HAVE_MKDTEMP */
 
-/* Define to 1 if you have the <netinet/in.h> header file. */
-#define HAVE_NETINET_IN_H 1
-
 /* Define to 1 if you have the <netinet/tcp.h> header file. */
 /* #undef HAVE_NETINET_TCP_H */
 
@@ -273,9 +270,6 @@
 /* Define to 1 if the PS_STRINGS thing exists. */
 /* #undef HAVE_PS_STRINGS */
 
-/* Define to 1 if you have the <pwd.h> header file. */
-#define HAVE_PWD_H 1
-
 /* Define to 1 if you have the `random' function. */
 /* #undef HAVE_RANDOM */
 
@@ -435,15 +429,9 @@
 /* Define to 1 if you have the <sys/shm.h> header file. */
 /* #undef HAVE_SYS_SHM_H */
 
-/* Define to 1 if you have the <sys/socket.h> header file. */
-#define HAVE_SYS_SOCKET_H 1
-
 /* Define to 1 if you have the <sys/stat.h> header file. */
 #define HAVE_SYS_STAT_H 1
 
-/* Define to 1 if you have the <sys/time.h> header file. */
-#define HAVE_SYS_TIME_H 1
-
 /* Define to 1 if you have the <sys/types.h> header file. */
 #define HAVE_SYS_TYPES_H 1