Revert "GDB: Only build for "unix:" connections if AF_LOCAL is supported."

This reverts commit 98a17ece01.

gdb/ChangeLog

@@ -2,14 +2,6 @@
 
 	* procfs.c: Include common/pathstuff.h.
 
-2018-10-29   John Darrington <john@darrington.wattle.id.au>
-
-	* configure.ac: New test HAVE_AF_LOCAL
-	* common/netstuff.c (parse_connection_spec) [prefixes]: Only
-	compile "unix:" if HAVE_AF_LOCAL is true.
-	* configure: Regenerate.
-	* config.in: Regenerate.
-
 2018-10-28  Andrew Burgess  <andrew.burgess@embecosm.com>
 
 	* riscv-linux-nat.c (riscv_linux_nat_target::fetch_registers):

gdb/common/netstuff.c

@@ -145,9 +145,7 @@ parse_connection_spec (const char *spec, struct addrinfo *hint)
       { "tcp4:", AF_INET,   SOCK_STREAM },
       { "udp6:", AF_INET6,  SOCK_DGRAM },
       { "tcp6:", AF_INET6,  SOCK_STREAM },
-#if HAVE_AF_LOCAL
       { "unix:", AF_LOCAL,  SOCK_STREAM },
-#endif
     };
 
   for (const host_prefix prefix : prefixes)

gdb/config.in

@@ -68,9 +68,6 @@
 /* Define if self-testing features should be enabled */
 #undef GDB_SELF_TEST
 
-/* Define to 1 if AF_LOCAL is defined or declared by sys/socket.h. */
-#undef HAVE_AF_LOCAL
-
 /* Define to 1 if you have `alloca', as a function or macro. */
 #undef HAVE_ALLOCA
 

gdb/configure

@@ -13997,27 +13997,6 @@ _ACEOF
 fi
 
 
-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-
-#include <sys/socket.h>
-
-int
-main ()
-{
-int x = AF_LOCAL
-  ;
-  return 0;
-}
-_ACEOF
-if ac_fn_c_try_compile "$LINENO"; then :
-
-$as_echo "#define HAVE_AF_LOCAL 1" >>confdefs.h
-
-fi
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
-
-
 if test "$cross_compiling" = no; then
   { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether setpgrp takes no argument" >&5
 $as_echo_n "checking whether setpgrp takes no argument... " >&6; }

gdb/configure.ac

@@ -1366,16 +1366,6 @@ GDB_AC_COMMON
 # Check the return and argument types of ptrace.
 GDB_AC_PTRACE
 
-dnl Check to see if sys/socket.h knows about AF_LOCAL
-AC_COMPILE_IFELSE(
-     [AC_LANG_PROGRAM([[
-#include <sys/socket.h>
-]],
-	 [[int x = AF_LOCAL]])],
-[AC_DEFINE([HAVE_AF_LOCAL], [1],
-     [Define to 1 if AF_LOCAL is defined or declared by sys/socket.h.])])
-
-
 dnl AC_FUNC_SETPGRP does not work when cross compiling
 dnl Instead, assume we will have a prototype for setpgrp if cross compiling.
 if test "$cross_compiling" = no; then