[Interest] [Development] Qt installation prefix path issue

[Thiago Macieira]

On Wednesday, 25 October 2017 14:47:43 PDT Christian Gagneraud wrote:
> > Considering the contents of that website change very frequently, I'd
> > assume
> > that the reason is either that there's no point indexing something that
> > becomes stale quickly or that they want to reduce the workload on the
> > server caused by the indexing (remember: everything is generated).
> 
> I do understand that they want to reduce the server load, but it would
> be nice to be able to search from google et al ('git grep' is one thing,
> 'google grep' is another).
> 
> When I answered your email, i would have liked to give a link, because i
> find these sort of things very interesting indeed. Unfortunately a quick
> googling didn't return anything, and i couldn't remember where exactly i
> saw the "relocation by patching the binaries", i'm pretty sure it was a
> python script in Boot2Qt.

Sorry, nothing replaces having a local copy if you don't know for sure what 
you're looking for. Today, I spent half an hour figuring out where the 
different /dev/random implementations are on FreeBSD, OpenBSD, NetBSD and 
macOS. They're all indexed in fxr.watson.org, but the macOS copy there is 
stale. So I went to opensource.apple.com and GitHub. Even knowing the exact 
function name I'm looking for (read_random), I can't find it online.

And note how GitHub isn't indexed either:
https://www.google.com/search?q=read_random+site%3Agithub.com%2Fopensource-apple%2Fxnu

> github content is indexed, and they even have their own search engine
> with REST API, and a new GraphQL API it seems

Doesn't appear to be the case for everything, as shown above.

> The query "qabstractitemmodel site:github.com" on google return 1870
> results for example.
> You can even try "qabstractitemmodel site:github.com/qt"
> 
> Having said that, yes the content changes all the time, so (google)
> results are somehow volatile, still they tend to point you in the right
> direction. I sometimes found interesting git repos this way, that I then
> clone, grep, study, and sometimes end up contributing back.

And I found out that read_random() is now a system call on FreeBSD, bypassing 
the ARC4 algorithm, and that getentropy() does exist on macOS and on Solaris, 
and that Qt check is just missing an #include.

> PS: I don't get what you mean by "everything is generated", do you mean
> that HTML is generated on the fly w/o caching?

Yes.

-- 
Thiago Macieira - thiago.macieira (AT) intel.com
  Software Architect - Intel Open Source Technology Center