libgo patch committed: Add some more networking constants

[Ian Lance Taylor]

This libgo patch changes mksysinfo.sh to add some more networking
constants.  This is really just a snapshot, there are more to come,
based on differences between gccgo and the master Go library.
Bootstrapped and ran Go testsuite on x86_64-unknown-linux-gnu.
Committed to mainline.

Ian


diff -r 888f1f45a4aa libgo/configure.ac
--- a/libgo/configure.ac	Tue Apr 03 10:56:09 2012 -0700
+++ b/libgo/configure.ac	Tue Apr 03 12:33:57 2012 -0700
@@ -453,7 +453,7 @@
   ;;
 esac
 
-AC_CHECK_HEADERS(sys/mman.h syscall.h sys/epoll.h sys/ptrace.h sys/syscall.h sys/user.h sys/utsname.h sys/select.h sys/socket.h net/if.h sys/prctl.h sys/mount.h sys/vfs.h sys/statfs.h sys/timex.h sys/sysinfo.h utime.h linux/reboot.h)
+AC_CHECK_HEADERS(sys/mman.h syscall.h sys/epoll.h sys/ptrace.h sys/syscall.h sys/user.h sys/utsname.h sys/select.h sys/socket.h net/if.h net/if_arp.h sys/prctl.h sys/mount.h sys/vfs.h sys/statfs.h sys/timex.h sys/sysinfo.h utime.h linux/reboot.h)
 
 AC_CHECK_HEADERS([linux/filter.h linux/netlink.h linux/rtnetlink.h], [], [],
 [#ifdef HAVE_SYS_SOCKET_H
diff -r 888f1f45a4aa libgo/mksysinfo.sh
--- a/libgo/mksysinfo.sh	Tue Apr 03 10:56:09 2012 -0700
+++ b/libgo/mksysinfo.sh	Tue Apr 03 12:33:57 2012 -0700
@@ -94,6 +94,9 @@
 #if defined(HAVE_NET_IF_H)
 #include <net/if.h>
 #endif
+#if defined(HAVE_NET_IF_ARP_H)
+#include <net/if_arp.h>
+#endif
 #if defined(HAVE_SYS_MOUNT_H)
 #include <sys/mount.h>
 #endif
@@ -211,7 +214,7 @@
 fi
 
 # Networking constants.
-egrep '^const _(AF|SOCK|SOL|SO|IPPROTO|TCP|IP|IPV6)_' gen-sysinfo.go |
+egrep '^const _(AF|ARPHRD|SOCK|SOL|SO|IPPROTO|TCP|IP|IPV6)_' gen-sysinfo.go |
   sed -e 's/^\(const \)_\([^= ]*\)\(.*\)$/\1\2 = _\2/' >> ${OUT}
 grep '^const _SOMAXCONN' gen-sysinfo.go |
   sed -e 's/^\(const \)_\(SOMAXCONN[^= ]*\)\(.*\)$/\1\2 = _\2/' \
@@ -710,6 +713,10 @@
 # The routing message flags.
 grep '^const _RTA' gen-sysinfo.go | \
     sed -e 's/^\(const \)_\(RTA[^= ]*\)\(.*\)$/\1\2 = _\2/' >> ${OUT}
+grep '^const _RTF' gen-sysinfo.go | \
+    sed -e 's/^\(const \)_\(RTF[^= ]*\)\(.*\)$/\1\2 = _\2/' >> ${OUT}
+grep '^const _RTCF' gen-sysinfo.go | \
+    sed -e 's/^\(const \)_\(RTCF[^= ]*\)\(.*\)$/\1\2 = _\2/' >> ${OUT}
 grep '^const _RTM' gen-sysinfo.go | \
     sed -e 's/^\(const \)_\(RTM[^= ]*\)\(.*\)$/\1\2 = _\2/' >> ${OUT}
 
@@ -938,6 +945,10 @@
       -e 's/_sock_filter/SockFilter/' \
     >> ${OUT}
 
+# The GNU/Linux filter flags.
+grep '^const _BPF_' gen-sysinfo.go | \
+  sed -e 's/^\(const \)_\(BPF_[^= ]*\)\(.*\)$/\1\2 = _\2/' >> ${OUT}
+
 # The Solaris 11 Update 1 _zone_net_addr_t struct.
 grep '^type _zone_net_addr_t ' gen-sysinfo.go | \
     sed -e 's/_in6_addr/[16]byte/' \