Build log verbosity changes

[David Holmes]

Hi Magnus,

How does VERBOSE= on the make invocation relate to this ??

Thanks,
David

On 10/10/2012 11:37 PM, Magnus Ihse Bursie wrote:
> I'm currently working on getting the build log verbosity to more
> consistent levels.
>
> First of all, I have slightly redefined the existing log levels. Now we
> have:
> * warn = default. This will be as quiet as reasonably possible. Warnings
> and errors will be printed, and progress information for slow steps.
> * info = all in warn, plus slightly more verbosity. This gives more
> detailed information on how the build is progressing (often, on a
> per-file basis) and some high-level makefile information. If you're
> curious, or have a slow machine and want constant feedback, use LOG=info.
> * debug = all in info, plus default make rule execution output. This is
> similar to the default style in the old build, and to what up until now
> was LOG=info. If you want to manually re-run a command line, this is
> what you need.
> * trace = all in debug, plus additional makefile debug data. This is
> useful if you need to track down errors in the makefile, but not
> otherwise. Will produce loads of output.
>
> In summary: If you previously used LOG=info to emulate old behaviour,
> you now need to to LOG=debug. (But check out LOG=info, it might just be
> good enough!)
>
> The idea is that the default log level should be reasonably quiet, so
> that it's easier to spot warnings.
>
> I have worked my way halfway through the build (up until the main class
> compilation in the jdk target) in putting output on the correct log
> level. From there on, it's still heavily verbose on the default level.
> I'll fix this shortly.
>
> For those interested in debugging the new build system, I also added a
> nifty feature on the info level. The Setup-macros will now be printed
> with their named arguments evaluated, like this:
> SetupJavaCompilation(BUILD_TOOLS)
> [2] SETUP:=BOOT_JAVAC
> [3] DISABLE_SJAVAC:=true
> [4] ADD_JAVAC_FLAGS:=-Xprefer:source
> [5] SRC:=/localhome/hg/build-infra-jdk8/langtools/make/tools
> /localhome/hg/build-infra-jdk8/langtools/src/share/classes
> [6] INCLUDES:=compileproperties genstubs
> [7]
> BIN:=/localhome/hg/build-infra-jdk8/build/linux-x86_64-normal-server-release/langtools/btclasses
>
> Compiling 2 files for BUILD_TOOLS
>
> This will hopefully be helpful and instructive about what's really going
> on, on a higher level in the makefiles.
>
> /Magnus