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2.7. Upgrading Wine with a Patch

If you have the Wine source code, as opposed to a binary distribution, you have
the option of applying patches to the source tree to fix bugs and add
experimental features. Perhaps you've found a bug, reported it to the Wine
mailing list, and received a patch file to fix the bug. You can apply the patch
with the patch command, which takes a streamed patch from stdin:

$ cd wine
$ patch -p0 < ../patch_to_apply.diff
      

To remove the patch, use the -R option:

$ patch -p0 -R < ../patch_to_apply.diff
      

If you want to do a test run to see if the patch will apply successfully (e.g.,
if the patch was created from an older or newer version of the tree), you can
use the --dry-run parameter to run the patch without writing to any files:

$ patch -p0 --dry-run < ../patch_to_apply.diff
      

patch is pretty smart about extracting patches from the middle of a file, so if
you save an email with an inlined patch to a file on your hard drive, you can
invoke patch on it without stripping out the email headers and other text. 
patch ignores everything that doesn't look like a patch.

FIXME: Go into more depth about the -p0 option...

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