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Add examples how to use the --patch option to the Readme

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Mislav Marohnić 2013-12-20 19:06:50 +01:00
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@ -123,6 +123,25 @@ You can set certain environment variables to control the build process.
make options for buildling MRI. These variables will be passed to Ruby only,
not any dependent packages (e.g. libyaml).
### Applying patches to Ruby before compiling
Both `rbenv install` and `ruby-build` support the `--patch` (`-p`) flag that
signals that a patch from stdin should be applied to Ruby, JRuby, or Rubinius
source code before the `./configure` and compilation steps.
Example usage:
```sh
# applying a single patch
$ rbenv install --patch 1.9.3-p429 < /path/to/ruby.patch
# applying a patch from HTTP
$ rbenv install --patch 1.9.3-p429 < <(curl -sSL http://git.io/ruby.patch)
# applying multiple patches
$ cat fix1.patch fix2.patch | rbenv install --patch 1.9.3-p429
```
### Checksum verification
If you have the `md5`, `openssl`, or `md5sum` tool installed, ruby-build will