RFR(M): 8233787: Break cycle in vm_version* includes

[Schmidt, Lutz]

Hi Kim, 

that wasn't straightforward. Had to adapt make/hotspot/lib/CompileJvm.gmk. Build settings like HOTSPOT_VERSION_STRING have to flow into the compile step of abstract_vm_version.cpp now. For the details, see my comments below.

Other than that, I hope the new webrev is even closer to your dreams:
   http://cr.openjdk.java.net/~lucy/webrevs/8233787.02/ 

Thanks,
Lutz


On 14.11.19, 00:34, "Kim Barrett" <kim.barrett at oracle.com> wrote:

    > On Nov 13, 2019, at 11:42 AM, Schmidt, Lutz <lutz.schmidt at sap.com> wrote:
    > 
    > Hi Kim,
    > 
    > there is a new webrev at http://cr.openjdk.java.net/~lucy/webrevs/8233787.01/ 
    > 
    > It should be pretty close to what you view as the "right approach". There weren't too many changes relative to 8233787.00. Most files already had #include runtime/vm_version.hpp. 
    
    This looks much better to me, but many (most?) of the changed
    #includes need to be moved into sort order.

R: tried my best to fix the sort order. Sorry for not paying attention in the first place.
    
    ------------------------------------------------------------------------------
    src/hotspot/share/runtime/vm_version.cpp
    
    Abstract_VM_Version definitions should be moved to abstract_vm_version.cpp.
    Maybe just rename the file; I think the only thing that would be left
    for vm_version.cpp would be VM_Version_init().  But maybe that should
    be left behind in vm_version.cpp?  Though that makes the review messier.

R: Everything moved as you suggested. Doesn't make sense to have Abstract_VM_Version:: methods in vm_version.cpp file. 
    
    ------------------------------------------------------------------------------
    src/hotspot/share/runtime/abstract_vm_version.hpp
    
    Should #include globalDefinitions.hpp.
    - uint64_t features()
    - #define SUPPORTS_NATIVE_CX8

R: Done. 
    
    Should forward-declare class outsputStream.
    - print_virtualization_info
    - print_matching_lines_from_file (I wonder why this is *here*, but not your problem)

R: Done.
    
    ------------------------------------------------------------------------------