Bug 149913 – Add LLVM binaries for iOS 9 device

• Component: Tools / Tests
• Status: RESOLVED FIXED

[Daniel Bates]

Towards building for ARM64-based iOS devices with the public iOS SDK we need to add support infrastructure to build and install LLVM from source and commit pre-built LLVM binaries/headers for iOS 9.

[Daniel Bates]

Created attachment 262670 [details]
Patch

[Daniel Bates]

Created attachment 262671 [details]
[Part 1 of 2]: Build system and tooling changes

For convenience I thought to break this patch into two parts: 1) build system and tooling changes and 2) pre-build LLVM binaries.

[Daniel Bates]

Created attachment 262672 [details]
[Part 2 of 2]: LLVM binaries for iOS

[Daniel Bates]

Comment on attachment 262671 [details]
[Part 1 of 2]: Build system and tooling changes

View in context: https://bugs.webkit.org/attachment.cgi?id=262671&action=review

> Tools/Scripts/copy-webkitlibraries-to-product-directory:331
> +        # FIXME: Changes to SDKROOT are not detected between builds.

Will look to file a LLVM bug for this and update the FIXME comment to reference it before landing.

[Filip Pizlo]

RS=me on the binaries.

[Daniel Bates]

(In reply to comment #4)
> Comment on attachment 262671 [details]
> [Part 1 of 2]: Build system and tooling changes
> 
> View in context:
> https://bugs.webkit.org/attachment.cgi?id=262671&action=review
> 
> > Tools/Scripts/copy-webkitlibraries-to-product-directory:331
> > +        # FIXME: Changes to SDKROOT are not detected between builds.
> 
> Will look to file a LLVM bug for this and update the FIXME comment to
> reference it before landing.

Disregard this comment. Will remove FIXME comment. We pass SDKROOT to script configure to influence the search paths it uses to find the toolchain, headers and libraries (maybe there is a preferred way to specify these to script configure without using SDKROOT). Regardless, once configure finds these files it generates files so that make(1) will use them as appropriate.

The issue referred to by the comment is not so much that changes to SDKROOT are not detected but that calling `make` without specifying SDKROOT directly (or with a different SDKROOT value than called by copy-webkitlibraries-to-product-directory) from inside the LLVM build directory created after running Tools/Scripts/copy-webkitlibraries-to-product-directory will use the wrong SDK headers when compiling LLVM. Ideally this information could be saved as part of running the configure script (maybe encoded in the compiler flags using -isysroot?) such that we can invoke make(1) without explicitly specifying SDKROOT. I suggest we defer such work to a separate bug.

[Daniel Bates]

Committed r190759: <http://trac.webkit.org/changeset/190759>