Re: gdal build times increased massively. debuginfo? libarrow?

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On Thu, Aug 21, 2025 at 09:38:12PM +0200, Mark Wielaard wrote:
> Hi Kaleb,
> 
> On Thu, Aug 21, 2025 at 03:02:33PM -0400, Kaleb Keithley wrote:
> > On Thu, Aug 21, 2025 at 2:26 PM Mark Wielaard <mjw@xxxxxxxxxxxxxxxxx> wrote:
> > >
> > > It certainly looks that way. The ar format is not ideal to rewrite in
> > > place, which is why it is unpacked and repacked like this. Which isn't
> > > super efficient, but somewhat surprising it takes 20+ hours... That
> > > must be a pretty big .a file.
> > >
> > 
> > I don't even see any .a files in the three or four subpackages I looked at.
> 
> There is a libgdal.dll.a in the noarch mingw packages.
> I dunno if that is the one that causes the issue yet though.

*.dll.a files are so-called "implibs", which are a MinGW-ism.  In
Windows when you have a DLL (equivalent to .so), the main binary isn't
able to just load this.  Instead it links the binary to this "implib"
(in Windows that would be a *.lib file, in MinGW it's a *.dll.a file)
which contains library loading code plus function stubs (kind of like
a PLT I guess).

TL;DR, it's probably not worth processing these files for debuginfo,
but on the other hand I don't know any way (apart from the name) to
recognise them programmatically.

Rich.

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