Build of libvpx with clang_glibc toolchain

The build took 00h 01m 04s and was NOT successful.

The program in this build is written in the following languages, according to sloccount:

SLOCLanguage
178,252 ansic
87,730 cpp
32,272 asm
4,893 sh
2,780 python
2,212 perl
337 makefile
308,476 total

The process tree of the build process is here.

Several sub-process invocations were improper; see the process tree for details. Summary:

Due to the failure of this package to build, we did not attempt to build several packages that depend on this one. Those packages are:

Log

To avoid scrolling, you may jump to the last line of the invocation of makepkg that was used to build this package.

Removed vanilla repositories from pacman.conf and added:
# [tuscan]
# Server = file:///var/cache/pacman/pkg/

CMD: pacman -Syy --noconfirm
# :: Synchronizing package databases...
# downloading tuscan.db...

Copied permanent toolchain into container-local sysroot
# /toolchain_root/sysroot --> /sysroot/sysroot
# /toolchain_root/lib --> /sysroot/lib
# /toolchain_root/sbin --> /sysroot/sbin
# /toolchain_root/lib64 --> /sysroot/lib64
# /toolchain_root/etc --> /sysroot/etc
# /toolchain_root/share --> /sysroot/share
# /toolchain_root/bin --> /sysroot/bin
# /toolchain_root/var --> /sysroot/var
# /toolchain_root/usr --> /sysroot/usr
# /toolchain_root/glibc-build --> /sysroot/glibc-build
# /toolchain_root/x86_64-pc-linux-gnu --> /sysroot/x86_64-pc-linux-gnu
# /toolchain_root/include --> /sysroot/include
# /toolchain_root/libexec --> /sysroot/libexec

CMD: sudo -u tuscan PATH=/usr/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin CC=clang CXX=clang++ red makepkg --noextract --syncdeps --skipinteg --skippgpcheck --skipchecksums --noconfirm --nocolor --log --noprogressbar --nocheck
# ==> Making package: libvpx 1.5.0-4 (Thu Apr 13 19:14:29 UTC 2017)
# ==> Checking runtime dependencies...
# ==> Checking buildtime dependencies...
# ==> Installing missing dependencies...
# resolving dependencies...
# looking for conflicting packages...
#
# Packages (1) yasm-1.3.0-1
#
# Total Installed Size: 3.70 MiB
#
# :: Proceed with installation? [Y/n]
# checking keyring...
# checking package integrity...
# loading package files...
# checking for file conflicts...
# checking available disk space...
# :: Processing package changes...
# installing yasm...
# :: Running post-transaction hooks...
# (1/1) Updating manpage index...
# ==> WARNING: Using existing $srcdir/ tree
# ==> Starting build()...
# Unknown option "--host=x86_64-unknown-linux".
# See ./configure --help for available options.
# ==> ERROR: A failure occurred in build().
# Aborting...