Disable libitm if unsupported

[Pedro Alves]

On Tuesday 08 November 2011 16:33:52, Richard Henderson wrote:
> toplevel/
>         * configure.ac: Adjust srcdir for running libitm/configure.tgt.

> +# Disable libitm on unsupported hosted systems.
> +if test x$enable_libitm = x; then
> +   AC_MSG_CHECKING([for libitm support])
> +   if (srcdir=${srcdir}/libitm; \
> +       . ${srcdir}/configure.tgt; \

This should check that libitm exists before sourcing the script,
as otherwise it will error out on src tree
checkouts (binutils, gdb, ...), given that the libitm directory
doesn't exist there.

> +       test -n "$UNSUPPORTED"); then
> +       AC_MSG_RESULT([no])
>         noconfigdirs="$noconfigdir

-- 
Pedro Alves