RFR: JDK-8062159: Fix Xrender check to work with sysroot

[Phil Race]

Ditto.

-phil.

On 10/27/2014 10:33 AM, Tim Bell wrote:
> Erik:
>
>> Please review this small fix. In configure, there is a check on 
>> Solaris 10 for the definition of XLinearGradient in Xrender.h. The 
>> check is crude in that it's just a plain grep. It also isn't checking 
>> the correct file if using a devkit/sysroot. So far, the build has 
>> still worked, but when I recently experimented with upgrading the 
>> sysroot to later versions of Solaris, it failed because this check 
>> returned the wrong answer.
>>
>> I have converted the check to an AC_COMPILE_IFELSE call and verified 
>> that it gives the correct answers with Solaris 10u6, 10u10 and 11u1 
>> headers.
>>
>> Bug: https://bugs.openjdk.java.net/browse/JDK-8062159
>> Webrev: http://cr.openjdk.java.net/~erikj/8062159/webrev.root.01/
>
> Looks good to me-
>
> Tim
>