RFR: JDK-8224677: Dtrace .d files clash with make dependency .d files

[David Holmes]

On 24/05/2019 1:56 am, Erik Joelsson wrote:
> Since JDK-8217728, where I introduced some optimizations for handling of 
> the generated make dependency files for native compilation, building 
> hotspot incrementally on Solaris has been broken. The reason for the 
> breakage is that there is a clash between the *.d (header) files created 
> by the dtrace build and the *.d (make) files created by the compiler. 
> The optimization was to cat all the *.d make file together into a single 
> file, but if dtrace is enabled, this cat will inadvertently include the 
> dtrace files as well, which causes parse errors in make when make tries 
> to include the resulting file.
> 
> This fix changes the file extension used by dtrace files in the output 
> dir to *.dt to avoid the clash.

I would have changed the dependencies file - ".d" is the accepted 
extension for DTrace files.

David
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> Bug: https://bugs.openjdk.java.net/browse/JDK-8224677
> 
> Webrev: http://cr.openjdk.java.net/~erikj/8224677/webrev.01/
> 
> /Erik
>