util/build.sh runs with `set -eu -o pipefail`. `eval "$MAKE" --version | head -n2`
(and the analogous `as --version | head`) can race: head closes the pipe after N
lines, make/as catch SIGPIPE and exit non-zero, pipefail propagates the failure,
and errexit aborts the build before any compilation. Append `|| true` so these
purely-informational version prints can never fail the build.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
The build system supports using CC to control the C compiler
and CXX to control the c++ compiler used but src/cc was hardcoded
to use the binary "gcc". Now it respects the custom value of
$CC environment variable if it exists.
