[nicl] RFR Adding -L option to jextract tool

[Sundararajan Athijegannathan]

Updated to return boolean from SymbolChecker.lookup (and changed method 
name):  http://cr.openjdk.java.net/~sundar/jextract_L/webrev.01/

I tested FnType.h. I got two warnings for "useFn" and "useFunction" - 
nothing for "fn". Seems fine.

Thanks,
-Sundar

On 22/02/18, 1:56 AM, Henry Jen wrote:
> It print out an warning on symbols doesn't exist in library, but still generate code for it. It's compatible to what happens now.
>
> In the future we may want to skip unresolvable symbols, so a return value from symbol checker is probably good unless we think using Exception is preferred.
>
> I will test out what will happen with a function pointer parameter, like the useFunction in the attached header file. It's a parameter declaration and eventually will have a type to be defined later. Not quite remember what exactly will happen there, will let you know when I have a chance to test it.
>
> Cheers,
> Henry
>
>
>
>
>> On Feb 21, 2018, at 5:00 AM, Sundararajan Athijegannathan<sundararajan.athijegannathan at oracle.com>  wrote:
>>
>> -L option can be used to specifiy one or more shared object search paths. This path is used to search for symbols during jextract run. Any missing symbol results in a waring being issued during a jextract session. Note that the -rpath option is for runtime search of shared objects. -L is similar search path for jextract "tool time".
>>
>> Webrev: http://cr.openjdk.java.net/~sundar/jextract_L/webrev.00/index.html
>>
>> Thanks,
>> -Sundar