gnu: libva: Patch a dlopen call, set drivers path.
* gnu/packages/video.scm (libva): Patch the reference to libva-x11.so (passed to dlopen()) to use an absolute path. Add --with-drivers-path= to #:configure-flags with a value pointing to mesa's $prefix/lib/dri.
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@ -264,6 +264,27 @@ SMPTE 314M.")
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("libxext" ,libxext)
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("libxfixes" ,libxfixes)
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("mesa" ,mesa)))
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(arguments
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`(#:phases
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(modify-phases %standard-phases
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(add-before
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'build 'fix-dlopen-paths
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(lambda* (#:key outputs #:allow-other-keys)
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(let ((out (assoc-ref outputs "out")))
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(substitute* "va/drm/va_drm_auth_x11.c"
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(("\"libva-x11\\.so\\.%d\"")
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(string-append "\"" out "/lib/libva-x11.so.%d\"")))))))
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;; Most drivers are in mesa's $prefix/lib/dri, so use that. (Can be
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;; overridden at run-time via LIBVA_DRIVERS_PATH.)
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#:configure-flags
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(list (string-append "--with-drivers-path="
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(assoc-ref %build-inputs "mesa") "/lib/dri"))
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;; However, we can't write to mesa's store directory, so override the
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;; following make variable to install the dummy driver to libva's
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;; $prefix/lib/dri directory.
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#:make-flags
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(list (string-append "dummy_drv_video_ladir="
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(assoc-ref %outputs "out") "/lib/dri"))))
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(home-page "http://www.freedesktop.org/wiki/Software/vaapi/")
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(synopsis "Video acceleration library")
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(description "The main motivation for VA-API (Video Acceleration API) is
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