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Since commitfd562315, which updated waf to v2.1.1, Buildroot has encountered issues building mpv, likely due to an outdated version of the waf build system. Starting with mpv v0.35, meson was introduced as an alternative to waf, and in mpv v0.37, waf was completely removed. This commit updates the mpv makefile to use meson, resolving the build issues and simplifying future updates to newer versions of mpv. All options previously used for Waf have been translated to the new build system by replacing `--disable-feature` with `-Dfeature=disabled` (and similarly for enabling features). Some features have special handling: - The `/usr` prefix is automatically passed to meson packages by default. - The Android feature "has been removed since meson can detect if a machine is Android"[1]. - The `libmpv` parameter has been enabled in the makefile as `libmpv` must be built by default with mpv. - Meson packages automatically set whether the library should be built statically using the `default_library` meson parameter. - Meson automatically detects the presence of `libatomic` and passes the correct argument to the linker. However, it is possible to set the `stdatomic` meson parameter to specify whether `libatomic` must or must not be used. Fixes: https://autobuild.buildroot.org/results/68d42441fc0da34e1bf2a4247726f5f4ec3b8e77/ [1]:140ec21c89/DOCS/build-system-differences.md (L48)Signed-off-by: Thomas Bonnefille <thomas.bonnefille@bootlin.com> Tested-by: J. Neuschäfer <j.ne@posteo.net> Signed-off-by: Julien Olivain <ju.o@free.fr> (cherry picked from commit8f69974c20) Signed-off-by: Thomas Perale <thomas.perale@mind.be>