Applying ./patches/010-distutils.patch using plaintext: 
patching file meson.build
DEPRECATION: The [paths] section is deprecated, use the [built-in options] section instead.
DEPRECATION: The [paths] section is deprecated, use the [built-in options] section instead.
Using 'PKG_CONFIG_PATH' from environment with value: '/builder/shared-workdir/build/sdk/staging_dir/target-aarch64_generic_musl/usr/lib/pkgconfig:/builder/shared-workdir/build/sdk/staging_dir/target-aarch64_generic_musl/usr/share/pkgconfig'
The Meson build system
Version: 0.56.0
Source dir: /builder/shared-workdir/build/sdk/build_dir/target-aarch64_generic_musl/gst-libav-1.18.1
Build dir: /builder/shared-workdir/build/sdk/build_dir/target-aarch64_generic_musl/gst-libav-1.18.1/openwrt-build
Build type: cross build
WARNING: Unknown options: "build.c_args, build.c_link_args, build.cpp_args, build.cpp_link_args"
The value of new options can be set with:
meson setup <builddir> --reconfigure -Dnew_option=new_value ...
Project name: gst-libav
Project version: 1.18.1
Using 'CFLAGS' from environment with value: ''
Using 'LDFLAGS' from environment with value: ''
C compiler for the host machine: aarch64-openwrt-linux-musl-gcc (gcc 8.4.0 "aarch64-openwrt-linux-musl-gcc (OpenWrt GCC 8.4.0 r16596-09a35619b8) 8.4.0")
C linker for the host machine: aarch64-openwrt-linux-musl-gcc ld.bfd 2.34
Using 'LDFLAGS' from environment with value: ''
C++ compiler for the host machine: aarch64-openwrt-linux-musl-g++ (gcc 8.4.0 "aarch64-openwrt-linux-musl-g++ (OpenWrt GCC 8.4.0 r16596-09a35619b8) 8.4.0")
C++ linker for the host machine: aarch64-openwrt-linux-musl-g++ ld.bfd 2.34
C compiler for the build machine: gcc (gcc 8.3.0 "gcc (Debian 8.3.0-6) 8.3.0")
C linker for the build machine: gcc ld.bfd 2.31.1
C++ compiler for the build machine: g++ (gcc 8.3.0 "g++ (Debian 8.3.0-6) 8.3.0")
C++ linker for the build machine: g++ ld.bfd 2.31.1
Build machine cpu family: x86_64
Build machine cpu: x86_64
Host machine cpu family: x86_64
Host machine cpu: x86_64
Target machine cpu family: aarch64
Target machine cpu: armv8_64b
Found pkg-config: /builder/shared-workdir/build/sdk/staging_dir/host/bin/pkg-config (1.7.3)
Using 'PKG_CONFIG_PATH' from environment with value: '/builder/shared-workdir/build/sdk/staging_dir/target-aarch64_generic_musl/usr/lib/pkgconfig:/builder/shared-workdir/build/sdk/staging_dir/target-aarch64_generic_musl/usr/share/pkgconfig'
Run-time dependency libavfilter found: YES 7.85.100
Using 'PKG_CONFIG_PATH' from environment with value: '/builder/shared-workdir/build/sdk/staging_dir/target-aarch64_generic_musl/usr/lib/pkgconfig:/builder/shared-workdir/build/sdk/staging_dir/target-aarch64_generic_musl/usr/share/pkgconfig'
Run-time dependency libavformat found: YES 58.45.100
Using 'PKG_CONFIG_PATH' from environment with value: '/builder/shared-workdir/build/sdk/staging_dir/target-aarch64_generic_musl/usr/lib/pkgconfig:/builder/shared-workdir/build/sdk/staging_dir/target-aarch64_generic_musl/usr/share/pkgconfig'
Run-time dependency libavcodec found: YES 58.91.100
Using 'PKG_CONFIG_PATH' from environment with value: '/builder/shared-workdir/build/sdk/staging_dir/target-aarch64_generic_musl/usr/lib/pkgconfig:/builder/shared-workdir/build/sdk/staging_dir/target-aarch64_generic_musl/usr/share/pkgconfig'
Run-time dependency libavutil found: YES 56.51.100
Checking if "libav is provided by FFmpeg" with dependencies libavfilter, libavformat, libavcodec, libavutil compiles: YES 
Has header "unistd.h" : YES 
Found CMake: /builder/shared-workdir/build/sdk/staging_dir/host/bin/cmake (3.19.1)
Run-time dependency gstreamer-1.0 found: NO (tried pkgconfig and cmake)
Looking for a fallback subproject for the dependency gstreamer-1.0

../../../../build_dir/target-aarch64_generic_musl/gst-libav-1.18.1/meson.build:83:0: ERROR: Neither a subproject directory nor a gstreamer.wrap file was found.

A full log can be found at /builder/shared-workdir/build/sdk/build_dir/target-aarch64_generic_musl/gst-libav-1.18.1/openwrt-build/meson-logs/meson-log.txt
make[3]: *** [Makefile:219: /builder/shared-workdir/build/sdk/build_dir/target-aarch64_generic_musl/gst-libav-1.18.1/.configured_c3004cb90b7a2c340455637c286fadbf] Error 1
time: package/feeds/packages/gst1-libav/compile#2.64#0.74#5.30