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In Meson cross-files, "pkgconfig" was deprecated in favor of "pkg-config" in meson 1.3.0. The new name is used since 85a94dd4b563e961304b2d9082932c5c1cc2e582 to avoid a warning, but then it fails with older versions of meson. To avoid the problem, define both pkg-config and pkgconfig. > For backward compatibility it is still allowed to define both with the > same value, in that case no deprecation warning is printed. <https://mesonbuild.com/Release-notes-for-1-3-0.html#machine-files-pkgconfig-field-deprecated-and-replaced-by-pkgconfig>