Question about FileManagers in Jigsaw.

[Jonathan Gibbons]

On 03/13/2012 04:30 PM, Kelly O'Hair wrote:
>> >  
>> >  # build minimal new JDK runtime
>> >  2a) Compile Hotspot
> Just the C++ code of Hotspot, probably not the Java code. (Currently the hotspot Java code is built by the BOOT javac, which I think is wrong).
>
> And I think 2a 2b and 2c can be done in parallel?
>
>> >  2b) Compile base module using hybrid/bootstrap javac on BOOTDIR java
>> >  2c) Compile native libs for base module

The goal of 2{a,b,c} is to get a minimal runtime environment up and 
running.  So do what you need and exclude the rest.

Native libs (in 2c) require native headers, so you need to choose 
between use traditional javah, or use the newly added "javac -h" option. 
See links below.

"javac -h" provides a simpler way to get the minimal accurate set of 
native header files, and avoids lots of custom make macros specifying 
args for javah, but comes at the expense of waiting for javac to complete.

http://monaco.us.oracle.com/detail.jsf?cr=7150368
http://hg.openjdk.java.net/jdk8/tl/langtools/rev/b14d9583ce92

-- Jon