* Package:    media-libs/dav1d-0.2.1
 * Repository: gentoo
 * Maintainer: lu_zero@gentoo.org
 * Upstream:   https://code.videolan.org/videolan/dav1d/issues
 * USE:        10bit 8bit amd64 asm elibc_glibc kernel_linux multilib_abi_amd64 multilib_abi_x86 userland_GNU
 * FEATURES:   network-sandbox preserve-libs sandbox splitdebug userpriv usersandbox
>>> ABI=amd64
>>> Unpacking source (for ABI=amd64)...
>>> Unpacking dav1d-0.2.1.tar.bz2 to /var/tmp/portage/media-libs/dav1d-0.2.1/work
>>> Source unpacked in /var/tmp/portage/media-libs/dav1d-0.2.1/work
>>> Preparing source in /var/tmp/portage/media-libs/dav1d-0.2.1/work/dav1d-0.2.1 (for ABI=amd64) ...
>>> Source prepared.
>>> Configuring source in /var/tmp/portage/media-libs/dav1d-0.2.1/work/dav1d-0.2.1 (for ABI=amd64) ...
 * .amd64: running multilib-minimal_abi_src_configure
meson --buildtype plain --libdir lib64 --localstatedir /var/lib --prefix /usr --sysconfdir /etc --wrap-mode nodownload -D bitdepths=8,16 -D build_asm=true /var/tmp/portage/media-libs/dav1d-0.2.1/work/dav1d-0.2.1 /var/tmp/portage/media-libs/dav1d-0.2.1/work/dav1d-0.2.1-.amd64
The Meson build system
Version: 0.49.2
Source dir: /var/tmp/portage/media-libs/dav1d-0.2.1/work/dav1d-0.2.1
Build dir: /var/tmp/portage/media-libs/dav1d-0.2.1/work/dav1d-0.2.1-.amd64
Build type: native build
Project name: dav1d
Project version: 0.2.1
Appending CFLAGS from environment: '-march=native -O2 -pipe -m64'
Appending LDFLAGS from environment: '-Wl,--as-needed -Wl,--hash-style=gnu -m64'
Appending CPPFLAGS from environment: ' '
Native C compiler: x86_64-pc-linux-gnu-gcc (gcc 8.2.0 "x86_64-pc-linux-gnu-gcc (Gentoo Hardened 8.2.0-r6 p1.7) 8.2.0")
Build machine cpu family: x86_64
Build machine cpu: x86_64
Dependency threads found: YES 
Check usable header "stdatomic.h" : YES
Check usable header "unistd.h" : YES
Check usable header "io.h" : NO
Checking for function "getopt_long" : YES
Checking for function "posix_memalign" : YES
Compiler for C supports arguments -fvisibility=hidden: YES
Compiler for C supports arguments -Wundef: YES
Compiler for C supports arguments -Werror=vla: YES
Compiler for C supports arguments -Wno-maybe-uninitialized -Wmaybe-uninitialized: YES
Compiler for C supports arguments -Wno-missing-field-initializers -Wmissing-field-initializers: YES
Compiler for C supports arguments -Wno-unused-parameter -Wunused-parameter: YES
Compiler for C supports arguments -Werror=missing-prototypes: YES
Compiler for C supports arguments -Wshorten-64-to-32: NO
Compiler for C supports arguments -mpreferred-stack-boundary=5: YES
Configuring config.h using configuration
Configuring config.asm using configuration
Program nasm found: NO

meson.build:324:4: ERROR:  Program(s) ['nasm'] not found or not executable

A full log can be found at /var/tmp/portage/media-libs/dav1d-0.2.1/work/dav1d-0.2.1-.amd64/meson-logs/meson-log.txt
 * ERROR: media-libs/dav1d-0.2.1::gentoo failed (configure phase):
 *   (no error message)
 * 
 * Call stack:
 *     ebuild.sh, line  128:  Called src_configure
 *   environment, line 2927:  Called multilib-minimal_src_configure
 *   environment, line 1655:  Called multilib_foreach_abi 'multilib-minimal_abi_src_configure'
 *   environment, line 1870:  Called multibuild_foreach_variant '_multilib_multibuild_wrapper' 'multilib-minimal_abi_src_configure'
 *   environment, line 1585:  Called _multibuild_run '_multilib_multibuild_wrapper' 'multilib-minimal_abi_src_configure'
 *   environment, line 1583:  Called _multilib_multibuild_wrapper 'multilib-minimal_abi_src_configure'
 *   environment, line  642:  Called multilib-minimal_abi_src_configure
 *   environment, line 1649:  Called multilib_src_configure
 *   environment, line 2095:  Called meson_src_configure
 *   environment, line 1522:  Called die
 * The specific snippet of code:
 *       tc-env_build "$@" || die
 * 
 * If you need support, post the output of `emerge --info '=media-libs/dav1d-0.2.1::gentoo'`,
 * the complete build log and the output of `emerge -pqv '=media-libs/dav1d-0.2.1::gentoo'`.
 * The complete build log is located at '/var/tmp/portage/media-libs/dav1d-0.2.1/temp/build.log'.
 * The ebuild environment file is located at '/var/tmp/portage/media-libs/dav1d-0.2.1/temp/environment'.
 * Working directory: '/var/tmp/portage/media-libs/dav1d-0.2.1/work/dav1d-0.2.1-.amd64'
 * S: '/var/tmp/portage/media-libs/dav1d-0.2.1/work/dav1d-0.2.1'