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diff --git a/docs/markdown/howtox.md b/docs/markdown/howtox.md index 8231d3d9a..84546b73c 100644 --- a/docs/markdown/howtox.md +++ b/docs/markdown/howtox.md @@ -260,3 +260,28 @@ 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 +# Not needed on Windows! +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 + +executable( + 'myexe', + my_sources, + deps : [my_dep] +) +``` |