Bug 132619 – Add Makefile targets for copying static libraries (LLVM and WKSI)

• Component: Tools / Tests
• Status: RESOLVED FIXED

[David Kilzer (:ddkilzer)]

For developers that use "make" to build WebKit, it would be useful to have targets to copy the static libraries so that one could run:

make libs debug

Or even more abbreviated:

make l d

[Mark Rowe (bdash)]

Why not just include WebKitLibraries in the top level Makefile's list of projects, and give it a Makefile that does the right thing? Then the obvious "make debug" will Just Work.

[David Kilzer (:ddkilzer)]

Created attachment 230926 [details]
Patch v1

[David Kilzer (:ddkilzer)]

(In reply to comment #1)
> Why not just include WebKitLibraries in the top level Makefile's list of projects, and give it a Makefile that does the right thing? Then the obvious "make debug" will Just Work.

I had assumed for internal developers who build WKSI that this wouldn't be desirable, but I now realize the default action for copy-webkitlibraries-to-product-directory is not to overwrite newer copies of WKSI (and LLVM) static libraries, so this would be fine.

New patch forthcoming.

[David Kilzer (:ddkilzer)]

Created attachment 230927 [details]
Patch v2

[Mark Rowe (bdash)]

Comment on attachment 230927 [details]
Patch v2

View in context: https://bugs.webkit.org/attachment.cgi?id=230927&action=review

> WebKitLibraries/Makefile:10
> +libs l:
> +	perl $(SCRIPTS_PATH)/copy-webkitlibraries-to-product-directory --wksi --llvm
> +
> +llvm:
> +	perl $(SCRIPTS_PATH)/copy-webkitlibraries-to-product-directory --llvm
> +
> +wksi:
> +	perl $(SCRIPTS_PATH)/copy-webkitlibraries-to-product-directory --wksi

The llvm, wksi and l targets seem unnecessary.

How does copy-webkitlibraries-to-product-directory know which configuration's build directory to copy to?

[David Kilzer (:ddkilzer)]

(In reply to comment #5)
> (From update of attachment 230927 [details])
> View in context: https://bugs.webkit.org/attachment.cgi?id=230927&action=review
> 
> > WebKitLibraries/Makefile:10
> > +libs l:
> > +	perl $(SCRIPTS_PATH)/copy-webkitlibraries-to-product-directory --wksi --llvm
> > +
> > +llvm:
> > +	perl $(SCRIPTS_PATH)/copy-webkitlibraries-to-product-directory --llvm
> > +
> > +wksi:
> > +	perl $(SCRIPTS_PATH)/copy-webkitlibraries-to-product-directory --wksi
> 
> The llvm, wksi and l targets seem unnecessary.

The are convenience targets in case someone wants to "build" only one or the other (instead of typing out the whole command).

> How does copy-webkitlibraries-to-product-directory know which configuration's build directory to copy to?

It ends up calling productDir() in webkitdirs.pm, which uses the current set-webkit-configuration (which is set by Makefile.shared, which WebKitLibraries/Makefile includes) because we don't pass a product directory on the command line, and we don't set BUILT_PRODUCTS_DIR in the environment when the script is run.

In other words, the fallback for the product directory in copy-webkitlibraries-to-product-directory is the following:

1. command-line argument, else
2. $ENV{BUILT_PRODUCTS_DIR}, else
3. productDir() in webkitdirs.pm.

[David Kilzer (:ddkilzer)]

(In reply to comment #6)
> (In reply to comment #5)
> > The llvm, wksi and l targets seem unnecessary.
> 
> The are convenience targets in case someone wants to "build" only one or the other (instead of typing out the whole command).

I'm okay removing these as well.

[Mark Rowe (bdash)]

(In reply to comment #6)
> (In reply to comment #5)
> > (From update of attachment 230927 [details] [details])
> > View in context: https://bugs.webkit.org/attachment.cgi?id=230927&action=review
> > 
> > > WebKitLibraries/Makefile:10
> > > +libs l:
> > > +	perl $(SCRIPTS_PATH)/copy-webkitlibraries-to-product-directory --wksi --llvm
> > > +
> > > +llvm:
> > > +	perl $(SCRIPTS_PATH)/copy-webkitlibraries-to-product-directory --llvm
> > > +
> > > +wksi:
> > > +	perl $(SCRIPTS_PATH)/copy-webkitlibraries-to-product-directory --wksi
> > 
> > The llvm, wksi and l targets seem unnecessary.
> 
> The are convenience targets in case someone wants to "build" only one or the other (instead of typing out the whole command).
> 
> > How does copy-webkitlibraries-to-product-directory know which configuration's build directory to copy to?
> 
> It ends up calling productDir() in webkitdirs.pm, which uses the current set-webkit-configuration (which is set by Makefile.shared, which WebKitLibraries/Makefile includes) because we don't pass a product directory on the command line, and we don't set BUILT_PRODUCTS_DIR in the environment when the script is run.
> 
> In other words, the fallback for the product directory in copy-webkitlibraries-to-product-directory is the following:
> 
> 1. command-line argument, else
> 2. $ENV{BUILT_PRODUCTS_DIR}, else
> 3. productDir() in webkitdirs.pm.

Consider the following sequence of events:
1) set-webkit-configuration --release
2) make -C WebKitLibraries debug

Based on your WebKitLibraries/Makefile, I expect this will copy the libraries in to the Release configuration's build directory rather than Debug's like the command implies. I think you'll also see warnings like so:

Makefile:4: warning: overriding commands for target `debug'
../Makefile.shared:32: warning: ignoring old commands for target `debug'

[David Kilzer (:ddkilzer)]

Created attachment 230956 [details]
Patch v3

[WebKit Commit Bot]

Comment on attachment 230956 [details]
Patch v3

Clearing flags on attachment: 230956

Committed r168410: <http://trac.webkit.org/changeset/168410>

[WebKit Commit Bot]

All reviewed patches have been landed.  Closing bug.

[Blaze Burg]

*** Bug 129499 has been marked as a duplicate of this bug. ***