This feature is still under development, while it is recommended and usable and we will try not to break them in future releases, some breaking changes might still happen if necessary to prepare for the Conan 2.0 release.
Available since: 1.51.0
MesonToolchain normally works together with PkgConfigDeps to manage all the dependencies,
but sometimes we need to gather some flags coming from
Autotools tool so that’s what
MesonDeps is meant for. In other words, it is typically used
when Meson cannot find a dependency using the already known detection mechanisms like: pkg-config, cmake, config-tool, etc.
For instance, if we’d have these lines in your meson.build file, you might need
MesonDeps to find that dependency and inject the correct flags to the compiler:
project('tutorial', 'cpp') cxx = meson.get_compiler('cpp') mylib = cxx.find_library('mylib', required: true) executable('app', 'main.cpp', dependencies: mylib)
In a nutshell, the
MesonDeps generator is the dependencies generator for Meson and GNU flags. It creates a
conan_meson_deps_flags.ini file with all those flags collected by each dependency.
At this moment, this generator must be used along with
MesonToolchain one to make it work correctly.
This class will require very soon to define both the “host” and “build” profiles. It is very recommended to start defining both profiles immediately to avoid future breaking. Furthermore, some features, like trying to cross-compile might not work at all if the “build” profile is not provided.
MesonDeps generator can be used by name in conanfiles:
class Pkg(ConanFile): generators = "MesonDeps"
And it can also be fully instantiated in the conanfile
from conan import ConanFile from conan.tools.meson import MesonDeps class App(ConanFile): settings = "os", "arch", "compiler", "build_type" def generate(self): tc = MesonDeps(self) tc.generate()
MesonDeps generates after a
conan install command a conan_meson_deps_flags.ini file:
[constants] deps_c_args =  deps_c_link_args =  deps_cpp_args =  deps_cpp_link_args = 
This generator defines a Meson constants:
that accumulate all dependencies information, including transitive dependencies, with flags like
Those variables are added automatically as part of the built-in options declared by
For now, only the
requires information is generated, the
tool_requires one is not managed by this generator yet.
cpp_link_args: list of flags that accumulate all dependencies information. Each one is saved as
deps_cpp_link_args, respectively in the conan_meson_deps_flags.ini file.
from conan import ConanFile from conan.tools.meson import MesonDeps class App(ConanFile): settings = "os", "arch", "compiler", "build_type" def generate(self): tc = MesonDeps(self) tc.c_args.append("-val1") tc.c_link_args.append("-val2") tc.cpp_args.append("-val3") tc.cpp_link_args.append("-val4") tc.generate()