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The Meson Build System http://mesonbuild.com/
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meson/docs/markdown/Feature-autodetection.md

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docs: add a short description for all top pages in the Manual
8 years ago
---
short-description: Auto-detection of features like ccache and code coverage
...
docs: Import the website and wiki and build with hotdoc This allows us to more easily have the documentation in sync with the source code as people will have to document new features etc right at the time where they implement it.
8 years ago
# Feature autodetection
Meson is designed for high productivity. It tries to do as many things automatically as it possibly can.
CCache
--
doc: Use https links wherever possible.
8 years ago
[CCache](https://ccache.samba.org/) is a cache system designed to make compiling faster. When you run Meson for the first time for a given project, it checks if CCache is installed. If it is, Meson will use it automatically.
docs: Import the website and wiki and build with hotdoc This allows us to more easily have the documentation in sync with the source code as people will have to document new features etc right at the time where they implement it.
8 years ago
If you do not wish to use CCache for some reason, just specify your compiler with environment variables `CC` and/or `CXX` when first running Meson (remember that once specified the compiler can not be changed). Meson will then use the specified compiler without CCache.
Coverage
--
Allow gcovr >= 3.1 to be used to generate html coverage report Modern gcovr includes html generation support so if lcov and genhtml are not available fallback to gcovr. Kept lcov and genhtml as default so to not surprise existing users of coverage-html with the different output of gcovr. gcovr added html support in 3.0 but as there already is a test for 3.1 because of the changes to -r/--rootdir I opted to only allow html generation for >= 3.1 to keep things simple.
7 years ago
When doing a code coverage build, Meson will check the existence of binaries `gcovr`, `lcov` and `genhtml`. If the first one is found, it will create targets called *coverage-text* and *coverage-xml*. If the latter two or a new enough `gcovr` is found, it generates the target *coverage-html*. You can then generate coverage reports just by calling e.g. `ninja coverage-xml`.