[patch] for mig check in GDB's configure

[陆岳]

hi,

I found that when you missing the mid under GNU Hurd, the GDB's
configure doesn't complain about that.
But you will get a compile error until you do the make.
So I add the check.
By the way, I just check the existence of mig, have not check whether
mig work correct yet.

This is my first time to submit patch, I just build this by git
format-patch. If something wrong, just tell me, I will fix it.


>From 56d4bd42a8620d0f85987d83eb7720d67350da01 Mon Sep 17 00:00:00 2001
From: hacklu <hacklu.newborn@gmail.com>
Date: Fri, 3 May 2013 15:02:50 +0800
Subject: [PATCH] patch for check mig under GNU Hurd

        if no mig for use then exit!
---
 gdb/configure    |    9 +++++++++
 gdb/configure.ac |    9 +++++++++
 2 files changed, 18 insertions(+), 0 deletions(-)

diff --git a/gdb/configure b/gdb/configure
index c5ad94b..5c071e5 100755
--- a/gdb/configure
+++ b/gdb/configure
@@ -6229,6 +6229,15 @@ else
   MIG="$ac_cv_prog_MIG"
 fi

+case "${host}" in
+       *-linux*|*-k*bsd-gnu*)
+               ;;
+       i[3456789]86-*-gnu*)
+           if test "$MIG" = "" ; then
+               as_fn_error "no mig for use" "$LINENO" 5
+           fi
+           ;;
+esac

 # ---------------------- #
 # Checks for libraries.  #
diff --git a/gdb/configure.ac b/gdb/configure.ac
index bb7fbdd..f440ea9 100644
--- a/gdb/configure.ac
+++ b/gdb/configure.ac
@@ -488,6 +488,15 @@ AC_CHECK_TOOL(WINDRES, windres)

 # Needed for GNU/Hurd.
 AC_CHECK_TOOL(MIG, mig)
+case "${host}" in
+       *-linux*|*-k*bsd-gnu*)
+               ;;
+       i[[3456789]]86-*-gnu*)
+           if test "$MIG" = "" ; then
+               AC_MSG_ERROR([no mig for use])
+           fi
+           ;;
+esac

 # ---------------------- #
 # Checks for libraries.  #
--
1.7.0.4


-- 
Yue Lu (陆岳)