bpo-45847: Make socket module conditional (GH-29769)

configure

@@ -712,6 +712,8 @@ MODULE_OSSAUDIODEV_FALSE
 MODULE_OSSAUDIODEV_TRUE
 MODULE_GRP_FALSE
 MODULE_GRP_TRUE
+MODULE__SOCKET_FALSE
+MODULE__SOCKET_TRUE
 MODULE_MMAP_FALSE
 MODULE_MMAP_TRUE
 MODULE_FCNTL_FALSE
@@ -738,8 +740,6 @@ MODULE__TYPING_FALSE
 MODULE__TYPING_TRUE
 MODULE__STRUCT_FALSE
 MODULE__STRUCT_TRUE
-MODULE__SOCKET_FALSE
-MODULE__SOCKET_TRUE
 MODULE_SELECT_FALSE
 MODULE_SELECT_TRUE
 MODULE__RANDOM_FALSE
@@ -8371,7 +8371,7 @@ sys/times.h sys/types.h sys/uio.h sys/un.h sys/utsname.h sys/wait.h pty.h \
 libutil.h sys/resource.h netpacket/packet.h sysexits.h bluetooth.h \
 linux/tipc.h linux/random.h spawn.h util.h alloca.h endian.h \
 sys/endian.h sys/sysmacros.h linux/memfd.h linux/wait.h sys/memfd.h \
-sys/mman.h sys/eventfd.h linux/soundcard.h sys/soundcard.h syslog.h
+sys/mman.h sys/eventfd.h linux/soundcard.h sys/soundcard.h syslog.h netinet/in.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" "$ac_includes_default"
@@ -21222,15 +21222,6 @@ else
 fi
   as_fn_append MODULE_BLOCK "MODULE_SELECT=yes$as_nl"
 
-     if true; then
-  MODULE__SOCKET_TRUE=
-  MODULE__SOCKET_FALSE='#'
-else
-  MODULE__SOCKET_TRUE='#'
-  MODULE__SOCKET_FALSE=
-fi
-  as_fn_append MODULE_BLOCK "MODULE__SOCKET=yes$as_nl"
-
      if true; then
   MODULE__STRUCT_TRUE=
   MODULE__STRUCT_FALSE='#'
@@ -21445,6 +21436,42 @@ fi
 $as_echo "$py_cv_module_mmap" >&6; }
 
 
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for stdlib extension module _socket" >&5
+$as_echo_n "checking for stdlib extension module _socket... " >&6; }
+      case $py_stdlib_not_available in #(
+  *_socket*) :
+    py_cv_module__socket=n/a ;; #(
+  *) :
+    if true; then :
+  if test "$ac_cv_header_sys_socket_h" = "yes"                     -a "$ac_cv_header_sys_types_h" = "yes"                     -a "$ac_cv_header_netinet_in_h" = "yes"; then :
+  py_cv_module__socket=yes
+else
+  py_cv_module__socket=missing
+fi
+else
+  py_cv_module__socket=disabled
+fi
+   ;;
+esac
+  as_fn_append MODULE_BLOCK "MODULE__SOCKET=$py_cv_module__socket$as_nl"
+  if test "x$py_cv_module__socket" = xyes; then :
+
+
+
+
+fi
+   if test "$py_cv_module__socket" = yes; then
+  MODULE__SOCKET_TRUE=
+  MODULE__SOCKET_FALSE='#'
+else
+  MODULE__SOCKET_TRUE='#'
+  MODULE__SOCKET_FALSE=
+fi
+
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $py_cv_module__socket" >&5
+$as_echo "$py_cv_module__socket" >&6; }
+
+
 
   { $as_echo "$as_me:${as_lineno-$LINENO}: checking for stdlib extension module grp" >&5
 $as_echo_n "checking for stdlib extension module grp... " >&6; }
@@ -22982,10 +23009,6 @@ if test -z "${MODULE_SELECT_TRUE}" && test -z "${MODULE_SELECT_FALSE}"; then
   as_fn_error $? "conditional \"MODULE_SELECT\" was never defined.
 Usually this means the macro was only invoked conditionally." "$LINENO" 5
 fi
-if test -z "${MODULE__SOCKET_TRUE}" && test -z "${MODULE__SOCKET_FALSE}"; then
-  as_fn_error $? "conditional \"MODULE__SOCKET\" was never defined.
-Usually this means the macro was only invoked conditionally." "$LINENO" 5
-fi
 if test -z "${MODULE__STRUCT_TRUE}" && test -z "${MODULE__STRUCT_FALSE}"; then
   as_fn_error $? "conditional \"MODULE__STRUCT\" was never defined.
 Usually this means the macro was only invoked conditionally." "$LINENO" 5
@@ -23038,6 +23061,10 @@ if test -z "${MODULE_MMAP_TRUE}" && test -z "${MODULE_MMAP_FALSE}"; then
   as_fn_error $? "conditional \"MODULE_MMAP\" was never defined.
 Usually this means the macro was only invoked conditionally." "$LINENO" 5
 fi
+if test -z "${MODULE__SOCKET_TRUE}" && test -z "${MODULE__SOCKET_FALSE}"; then
+  as_fn_error $? "conditional \"MODULE__SOCKET\" was never defined.
+Usually this means the macro was only invoked conditionally." "$LINENO" 5
+fi
 if test -z "${MODULE_GRP_TRUE}" && test -z "${MODULE_GRP_FALSE}"; then
   as_fn_error $? "conditional \"MODULE_GRP\" was never defined.
 Usually this means the macro was only invoked conditionally." "$LINENO" 5

configure.ac

@@ -2206,7 +2206,7 @@ sys/times.h sys/types.h sys/uio.h sys/un.h sys/utsname.h sys/wait.h pty.h \
 libutil.h sys/resource.h netpacket/packet.h sysexits.h bluetooth.h \
 linux/tipc.h linux/random.h spawn.h util.h alloca.h endian.h \
 sys/endian.h sys/sysmacros.h linux/memfd.h linux/wait.h sys/memfd.h \
-sys/mman.h sys/eventfd.h linux/soundcard.h sys/soundcard.h syslog.h)
+sys/mman.h sys/eventfd.h linux/soundcard.h sys/soundcard.h syslog.h netinet/in.h)
 AC_HEADER_DIRENT
 AC_HEADER_MAJOR
 
@@ -6292,7 +6292,6 @@ PY_STDLIB_MOD_SIMPLE([_posixsubprocess])
 PY_STDLIB_MOD_SIMPLE([_queue])
 PY_STDLIB_MOD_SIMPLE([_random])
 PY_STDLIB_MOD_SIMPLE([select])
-PY_STDLIB_MOD_SIMPLE([_socket])
 PY_STDLIB_MOD_SIMPLE([_struct])
 PY_STDLIB_MOD_SIMPLE([_typing])
 PY_STDLIB_MOD_SIMPLE([_xxsubinterpreters])
@@ -6319,6 +6318,10 @@ PY_STDLIB_MOD([fcntl],
   [], [$FCNTL_LIBS])
 PY_STDLIB_MOD([mmap],
   [], [test "$ac_cv_header_sys_mman_h" = "yes" -a "$ac_cv_header_sys_stat_h" = "yes"])
+PY_STDLIB_MOD([_socket],
+  [], m4_flatten([test "$ac_cv_header_sys_socket_h" = "yes"
+                    -a "$ac_cv_header_sys_types_h" = "yes"
+                    -a "$ac_cv_header_netinet_in_h" = "yes"]))
 
 dnl platform specific extensions
 PY_STDLIB_MOD([grp], [], [test "$ac_cv_func_getgrgid" = yes -o "$ac_cv_func_getgrgid_r" = yes])

pyconfig.h.in

@@ -769,6 +769,9 @@
 /* Define to 1 if you have the <ndir.h> header file, and it defines `DIR'. */
 #undef HAVE_NDIR_H
 
+/* Define to 1 if you have the <netinet/in.h> header file. */
+#undef HAVE_NETINET_IN_H
+
 /* Define to 1 if you have the <netpacket/packet.h> header file. */
 #undef HAVE_NETPACKET_PACKET_H