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| author | Dylan Baker <dylan@pnwbakers.com> | 2020-05-12 10:06:41 -0700 |
|---|---|---|
| committer | Jussi Pakkanen <jpakkane@gmail.com> | 2020-05-14 01:59:34 +0300 |
| commit | 7ad8b5f221ed23ff9ca60349f76e91f79ecd211d (patch) | |
| tree | 47d66d54755e3c8e3e8cd0bc1e424d6cc43e7d1e /docs/markdown/howtox.md | |
| parent | 85708facaea88f0909e3e58eb42738eb11729b88 (diff) | |
| download | meson-7ad8b5f221ed23ff9ca60349f76e91f79ecd211d.zip meson-7ad8b5f221ed23ff9ca60349f76e91f79ecd211d.tar.gz meson-7ad8b5f221ed23ff9ca60349f76e91f79ecd211d.tar.bz2 | |
docs: Add a Howto about the null dependency [skip ci]
Diffstat (limited to 'docs/markdown/howtox.md')
| -rw-r--r-- | docs/markdown/howtox.md | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/docs/markdown/howtox.md b/docs/markdown/howtox.md index 8231d3d..abf7519 100644 --- a/docs/markdown/howtox.md +++ b/docs/markdown/howtox.md @@ -260,3 +260,26 @@ The `cmake_module_path` property is only needed for custom CMake scripts. System wide CMake scripts are found automatically. More information can be found [here](Dependencies.md#cmake) + +## Get a default not-found dependency? + +```meson +null_dep = dependency('', required : false) +``` + +This can be used in cases where you want a default value, but might override it +later. + +```meson +my_dep = dependency('', required : false) +if host_machine.system() in ['freebsd', 'netbsd', 'openbsd', 'dragonfly'] + my_dep = dependency('some dep', required : false) +elif host_machine.system() == 'linux' + my_dep = dependency('some other dep', required : false) +endif + +# Last ditch effort! +if no my_dep.found() + my_dep = meson.get_compiler('c').find_library('dep') +endif +``` |