Supporting git patches?

[Johannes Pfau]

Hi,

I'm trying to build D ( dlang.org ) cross compilers with crosstool-NG. 
There's a GCC D compiler, gdc ( gdcproject.org), but it's not yet 
included in the gcc sources. As crosstool already allows building custom 
languages I only need to patch the gcc sources in some way.

The gdc sources are currently distributed with a script which patches a 
gcc tree, but calling that script would require hacking crosstool-NG and 
this should work out of the box. So I thought I'd just create a diff 
between the unpatched GCC and the patched sources and let crosstool-NG 
apply this as a local patch.

It almost worked. But gdc creates new, executable files and diff/patch 
don't save/restore the executable bit.
So for now I just created a gcc-4.7.1.tar.bz2 archive with the patched 
sources and set the source tarball directory so crosstool-NG can find 
this file and it's working great, but a 83MB archive is a little 
annoying to distribute.

So I'm wondering if support for git patches could be added to 
crosstool-NG? Git patches have some advanced features, one of them is 
saving/restoring permissions. I think supporting that shouldn't be too 
difficult, just apply all *.gpatch files with 'git apply' and it should 
work, so it's probably a 2-3 line change, but my bash skills are too 
weak to implement this by myself :-)

(Of course I'm also happy with any other patch solution which restores 
the executable bit, but I only know of git diff / git apply)

-- 
Johannes Pfau


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