Disable libitm if unsupported

[Richard Henderson]

On 11/08/2011 09:56 AM, Pedro Alves wrote:
> On Tuesday 08 November 2011 17:31:45, Richard Henderson wrote:
>> On 11/08/2011 09:26 AM, Pedro Alves wrote:
>>> 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.
>>
>> Should I bother with an explicit test, or just use "set -e"?
> 
> Whatever works is fine with me.  :-)
> 

Tested and committed the following.


r~
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