Re: 64-bit version of Lilypond?

[Karlin High]

On 2/14/2019 4:04 AM, David Kastrup wrote:
> It may well be that the licensing conditions of any such SDK spell
> end-of-line for MacOSX support since Apple is allergic to the GPL-v3.
> It's conceivable that an OpenDarwin SDK without graphics support (after
> all, we don't really need it, even if it means lack of supporting
> platform fonts) could work instead.
>
> So "suitable Apple SDK" does not just mean "can be made to work" but
> also "is legally permitted to be made to work".

I have been trying to determine what licenses or permissions the current 
GUB macOS build tools are using. References found so far:

In <http://lilypond.org/downloads/gub-sources/>
darwin7-sdk-0.4.tar.gz
darwin8-sdk-0.4.tar.gz
odcctools-iphone-dev-278.tar.gz
odcctools-20060413.tar.bz2
gcc-4.2-20070207.tar.bz2 (Presumably Apple's version of gcc?)

Using git grep also found references to:

MacOSX10.3.9.sdk
MacOSX10.4u.sdk

Just matching up the versions for SDK, Darwin, XCode, and macOS takes 
some effort. Near as I can tell, SDK10.4.u = darwin8 = macOS 10.4 Tiger 
~= XCode 3.1 (correct me as needed.)

The only reference I could find find in lilypond-devel as to how those 
things got in GUB and under what conditions was this thread:

<http://lists.gnu.org/archive/html/lilypond-devel/2007-02/msg00200.html>

Apparently this is a conversation including Han-Wen Nienhuys and someone 
related to Apple - Matthias Neeracher, who mentions "an Apple-internal 
investigation." (cc to Han-Wen here.) GUB's macOS installer was having 
trouble running on 10.5 Leopard, suggestion made to upgrade version of 
XCode, Han-Wen explains about GUB. Full quote:

"
we use GUB (see 
<http://git.sv.gnu.org/gitweb/?p=lilypond.git;a=logh=gub>) to build 
binaries, not Xcode.  We link against

<http://lilypond.org/download/gub-sources/darwin8-sdk-0.4.tar.gz>

which is based on something that I got from ADC. Unfortunately, I can't 
work out which version it is.

If you could provide me with a similar tarball (or URL) which does work 
for 10.5, that would help. Unfortunately, the ADC requires login, so I 
can't put the proper URL for the SDK package right inside GUB.
"

End quote. I assume ADC means Apple Developer Center, today 
<https://developer.apple.com/> and the current SDK was downloaded from 
there, extracted and repackaged, and uploaded to somewhere 
GUB-accessible like its current location. Apple seems to do well at 
keeping old versions of developer tools available, back to Xcode Tools 
v1.0 from 2003. This has me wondering about a path forward for a newer SDK:

* Find what SDK is needed for 64-bit macOS builds.
    + Assuming Darwin 9, 10.5 SDK, macOS 10.5 Leopard.
* Try finding what terms the current SDK has or did have
* Find terms of required SDK
* If terms are not substantially different, do again what was done before.

Comments?
--
Karlin High
Missouri, USA