https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80942
--- Comment #4 from Vincent Lefèvre <vincent-gcc at vinc17 dot net> ---
(In reply to jos...@codesourcery.com from comment #2)
> The documentation explicitly says -Wpedantic includes some warnings about
> things outside of ISO C, beyond those that violate syntax rules or
> constraints.
This is not what is documented:
Issue all the warnings demanded by strict ISO C and ISO C++; reject
all programs that use forbidden extensions, and some other programs
that do not follow ISO C and ISO C++. For ISO C, follows the
version of the ISO C standard specified by any -std option used.
[...]
Some users try to use -Wpedantic to check programs for strict ISO C
conformance. They soon find that it does not do quite what they
want: it finds some non-ISO practices, but not all---only those for
which ISO C requires a diagnostic, and some others for which
diagnostics have been added.
Here, long strings are still valid C code, they are not even an extension (they
just depend on implementation limits). It does not make much sense to reject
them while still allowing some real extensions.
