ninja: build stopped: subcommand failed.
 * ERROR: sys-devel/llvm-6.0.1::gentoo failed (compile phase):
 *   ninja -v -j9 -l0 failed
 *
 * Call stack:
 *     ebuild.sh, line  124:  Called src_compile
 *   environment, line 4470:  Called multilib-minimal_src_compile
 *   environment, line 2786:  Called multilib_foreach_abi 'multilib-minimal_abi_src_compile'
 *   environment, line 3018:  Called multibuild_foreach_variant '_multilib_multibuild_wrapper' 'multilib-minimal_abi_src_compile'
 *   environment, line 2721:  Called _multibuild_run '_multilib_multibuild_wrapper' 'multilib-minimal_abi_src_compile'
 *   environment, line 2719:  Called _multilib_multibuild_wrapper 'multilib-minimal_abi_src_compile'
 *   environment, line  595:  Called multilib-minimal_abi_src_compile
 *   environment, line 2780:  Called multilib_src_compile
 *   environment, line 3230:  Called cmake-utils_src_compile
 *   environment, line 1029:  Called cmake-utils_src_make
 *   environment, line 1205:  Called _cmake_ninja_src_make
 *   environment, line  376:  Called eninja
 *   environment, line 1535:  Called die
 * The specific snippet of code:
 *       "$@" || die "${nonfatal_args[@]}" "${*} failed"
 *
 * If you need support, post the output of `emerge --info '=sys-devel/llvm-6.0.1::gentoo'`,
 * the complete build log and the output of `emerge -pqv '=sys-devel/llvm-6.0.1::gentoo'`.
 * The complete build log is located at '/var/tmp/portage/sys-devel/llvm-6.0.1/temp/build.log'.
 * The ebuild environment file is located at '/var/tmp/portage/sys-devel/llvm-6.0.1/temp/environment'.
 * Working directory: '/var/tmp/portage/sys-devel/llvm-6.0.1/work/llvm-6.0.1.src-abi_x86_64.amd64'
 * S: '/var/tmp/portage/sys-devel/llvm-6.0.1/work/llvm-6.0.1.src'

>>> Failed to emerge sys-devel/llvm-6.0.1, Log file:

>>>  '/var/tmp/portage/sys-devel/llvm-6.0.1/temp/build.log'

 * Messages for package dev-perl/Net-SMTP-SSL-1.40.0:

 * This package is deprecated by upstream as equivalent support for SSL and
 * STARTTLS is available with Net::SMTP 2.35, found in:
 *   >=virtual/perl-libnet-1.28 ( >=dev-lang/perl-5.20.0 )
 * Subsequently, this package is only available for compatibility reasons, and
 * should be avoided in new code.

 * Messages for package sys-devel/llvm-6.0.1:

 * ERROR: sys-devel/llvm-6.0.1::gentoo failed (compile phase):
 *   ninja -v -j9 -l0 failed
 *
 * Call stack:
 *     ebuild.sh, line  124:  Called src_compile
 *   environment, line 4470:  Called multilib-minimal_src_compile
 *   environment, line 2786:  Called multilib_foreach_abi 'multilib-minimal_abi_src_compile'
 *   environment, line 3018:  Called multibuild_foreach_variant '_multilib_multibuild_wrapper' 'multilib-minimal_abi_src_compile'
 *   environment, line 2721:  Called _multibuild_run '_multilib_multibuild_wrapper' 'multilib-minimal_abi_src_compile'
 *   environment, line 2719:  Called _multilib_multibuild_wrapper 'multilib-minimal_abi_src_compile'
 *   environment, line  595:  Called multilib-minimal_abi_src_compile
 *   environment, line 2780:  Called multilib_src_compile
 *   environment, line 3230:  Called cmake-utils_src_compile
 *   environment, line 1029:  Called cmake-utils_src_make
 *   environment, line 1205:  Called _cmake_ninja_src_make
 *   environment, line  376:  Called eninja
 *   environment, line 1535:  Called die
 * The specific snippet of code:
 *       "$@" || die "${nonfatal_args[@]}" "${*} failed"
 *
 * If you need support, post the output of `emerge --info '=sys-devel/llvm-6.0.1::gentoo'`,
 * the complete build log and the output of `emerge -pqv '=sys-devel/llvm-6.0.1::gentoo'`.
 * The complete build log is located at '/var/tmp/portage/sys-devel/llvm-6.0.1/temp/build.log'.
 * The ebuild environment file is located at '/var/tmp/portage/sys-devel/llvm-6.0.1/temp/environment'.
 * Working directory: '/var/tmp/portage/sys-devel/llvm-6.0.1/work/llvm-6.0.1.src-abi_x86_64.amd64'
 * S: '/var/tmp/portage/sys-devel/llvm-6.0.1/work/llvm-6.0.1.src'

 * GNU info directory index is up-to-date.