[Bug go/81421] Circular runtime.s-gox -> runtime.lo dependency dropped -> objcopy: 'runtime.s-gox.tmp': No such file

[ian at airs dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81421

--- Comment #14 from Ian Lance Taylor <ian at airs dot com> ---
OK, so the sed command works.  Run the sed command redirecting standard output
to a file, then see what this prints:

grep '^// +build ' FILE

It sounds like that will print nothing.  The only way I could explain that
would be if your grep command acts like either fgrep or egrep rather than
normal grep.

Do you have GREP_OPTIONS set in your environment?  Do you have any symlink from
grep to egrep or fgrep?