When I rewrote and compated the output of build times per top-level target, I wanted to remove the name of the target from the time (which was otherwise included as part of the file).

In MakeHelper.gmk we have this line in TargetExit (~ line 144):
    $(BUILD_LOG_WRAPPER) $(PRINTF) "## Finished $(patsubst %-only,%,$@) (build time %s)\n\n" \
        "`$(CAT) $(BUILDTIMESDIR)/build_time_diff_$(patsubst %-only,%,$@) | $(CUT) -f 1 -d " "`"

However, on all Tendril solaris machines, this results in:
/bin/sh: : cannot execute
## Finished langtools (build time 00:00:19 langtools)

instead of
## Finished langtools (build time 00:00:19)

It seems the $CAT does work, but not the $CUT, which turns into a "sh: : cannot execute". Does CUT resolve to the empty string? That's weird.

Previously, I had $(CUT) -d " " -f 1 (note the order of arguments), and then I got even worse results.

I couldn't reproduce this when running manually on some selected Solaris machine.

I don't know what to make of this, but it's annoying.