Index: llvm/trunk/autoconf/configure.ac
===================================================================
--- llvm/trunk/autoconf/configure.ac
+++ llvm/trunk/autoconf/configure.ac
@@ -74,7 +74,7 @@
 fi
 
 dnl Quit if it is an in-source build
-if test ${srcdir} == "." ; then
+if test ${srcdir} = "." ; then
   AC_MSG_ERROR([In-source builds are not allowed. Please configure from a separate build directory!])
 fi
 
Index: llvm/trunk/configure
===================================================================
--- llvm/trunk/configure
+++ llvm/trunk/configure
@@ -2033,7 +2033,7 @@
   fi
 fi
 
-if test ${srcdir} == "." ; then
+if test ${srcdir} = "." ; then
   { { echo "$as_me:$LINENO: error: In-source builds are not allowed. Please configure from a separate build directory!" >&5
 echo "$as_me: error: In-source builds are not allowed. Please configure from a separate build directory!" >&2;}
    { (exit 1); exit 1; }; }