[Webkit-unassigned] [Bug 161433] New: [CMake] CMake does not support the dep file of preprocess-idls.pl --supplementalMakefileDeps

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=161433

            Bug ID: 161433
           Summary: [CMake] CMake does not support the dep file of
                    preprocess-idls.pl --supplementalMakefileDeps
    Classification: Unclassified
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Tools / Tests
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: Hironori.Fujii at sony.com
                CC: lforschler at apple.com

[CMake] CMake does not support the dep file of preprocess-idls.pl --supplementalMakefileDeps

preprocess-idls.pl has a switch --supplementalMakefileDeps to generate dynamic dependency file (SupplementalDependencies.dep).
And, Source/WebCore/DerivedSources.make includes the file:

> -include $(SUPPLEMENTAL_MAKEFILE_DEPS)

But, CMake does not support the dynamic custom dependencies.

For example, we have a following problem of incremental build:

1) Build
>   ./Tools/Scripts/build-webkit --gtk --debug --64-bit
2) Rename webkitBattery to webkitBattery2
>   sed -i s/webkitBattery/webkitBattery2/ Source/WebCore/Modules/battery/NavigatorBattery.*
3) Build again
>    ./Tools/Scripts/build-webkit --gtk --debug --64-bit
4) But, WebKitBuild/Debug/DerivedSources/WebCore/JSNavigator.cpp is not updated
5) We need to manually touch supplemented IDL files.
>   touch Source/WebCore/page/Navigator.idl

There are three solutions:

A) Use DerivedSources.make (Bug 130339)
B) Generate Makefile for preprocess-idls.pl and generate-bindings.pl and invoke 'make'
C) Implement Make-like tool in Python or Perl

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