https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71930
Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Resolution|INVALID |DUPLICATE
--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Since g++ usually implies -x c++ it is reasonable to expect it to also do so
when reading from standard input. This error message isn't clear that you need
*both* -E and -x to get the desired behaviour:
$ g++ - <<< 'int main() { throw 1; }'
g++: error: -E or -x required when input is from standard input
Since the driver invoked was g++ it is fairly certain the user wanted -x c++ to
be implied. Obeying the error and adding -E *seems* to work, but loses the -x
c++ default.
But this is a dup of PR 67023 anyway.
*** This bug has been marked as a duplicate of bug 67023 ***
