>  
> If someone wishes to submit a patch for that bug for 4.0 branch, I expect 
> it could be considered for 4.0.2 but might be too risky for 4.0.1 now.
> 

Like so? Tested by building outside the source directory and attempting
to build in the source directory. Did we want something like this for
mainline too?

-eric

2005-06-21  Eric Christopher  <[EMAIL PROTECTED]>

        * configure.in: Reject building in the source directory.

Index: configure.in
===================================================================
RCS file: /cvs/gcc/gcc/configure.in,v
retrieving revision 1.341.2.4
diff -u -p -w -r1.341.2.4 configure.in
--- configure.in        6 Jun 2005 06:59:11 -0000       1.341.2.4
+++ configure.in        21 Jun 2005 22:15:20 -0000
@@ -70,6 +70,11 @@ progname=$0
 # if PWD already has a value, it is probably wrong.
 if test -n "$PWD" ; then PWD=`${PWDCMD-pwd}`; fi
 
+# If we're building in the source directory, error.
+if test "${srcdir}" = "." ; then
+  AC_MSG_ERROR([Building in the source directory is not supported. See
http://gcc.gnu.org/install/configure.html for more details.])
+fi
+
 # Export original configure arguments for use by sub-configures.  These
 # will be expanded by make, so quote '$'.
 tmp="$progname $@"


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