Upstream-Status: Pending

This patch updates libtool.m4 (and its output) to resolve a problem
with variable 'lt_sysroot' not being properly updated if the option
'--with[-libtool]-sysroot' is not provided when running the 'configure'
script for a package.

I have also reported the problem to libtool here

http://lists.gnu.org/archive/html/bug-libtool/2013-09/msg00005.html

Signed-off-by: Hans Beckerus <hans.beckerus at gmail.com>
---
diff -ur libtool-2.4.2.orig/libltdl/m4/libtool.m4 libtool-2.4.2/libltdl/m4/libtool.m4
--- libtool-2.4.2.orig/libltdl/m4/libtool.m4	2013-09-13 22:37:43.647282945 +0200
+++ libtool-2.4.2/libltdl/m4/libtool.m4	2013-09-14 10:27:37.168178605 +0200
@@ -1234,16 +1234,21 @@
 dnl in case the user passed a directory name.
 lt_sysroot=
 case ${with_libtool_sysroot} in #(
- yes)
+ no)
    if test "$GCC" = yes; then
      lt_sysroot=`$CC --print-sysroot 2>/dev/null`
+     # Treat "/" the same a an unset sysroot. It seems to be more
+     # compatible across host platforms that way!?
+     if test "$lt_sysroot" = /; then
+       lt_sysroot=
+     fi
    fi
    ;; #(
+ yes|''|/)
+   ;; #(
  /*)
    lt_sysroot=`echo "$with_libtool_sysroot" | sed -e "$sed_quote_subst"`
    ;; #(
- no|'')
-   ;; #(
  *)
    AC_MSG_RESULT([${with_libtool_sysroot}])
    AC_MSG_ERROR([The sysroot must be an absolute path.])