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add vopt_conflict helper

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vopt_conflict prints an error and exits if two options are set at the
same time.
This commit is contained in:
Dominik Honnef 2014-09-05 16:41:50 +02:00
parent 62b3c65d77
commit 191c1eaf51
2 changed files with 10 additions and 0 deletions
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Manual.md
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@ -535,6 +535,10 @@ package accordingly. Additionally, the following functions are available:
Same as `vopt_with`, but uses `--enable-<flag>` and
`--disable-<flag>` respectively.
- *vopt_conflict()* `vopt_conflict <option 1> <option 2>`
Emits an error and exits if both options are set at the same time.
The following example shows how to change a source package that uses GNU
configure to enable a new build option to support PNG images: