Build log should be verbose. All versions of sys-apps/the_silver_searcher are affected. Possible solutions (adding the following to the ebuild): MAKEOPTS+=" V=1" or MAKEOPTS="${MAKEOPTS} V=1"
that should rather be solved by bumping to EAPI=5 or appending --disable-silent-rules to econf EAPI=5 seems to be allowed in ~arch since yesterday
Fixed in sys-apps/the_silver_searcher-0.12