Hi Jeff,
On 10/25/19 3:22 PM, Jeff Law wrote:
So across Fedora the BOZ stuff tripped 2-3 packages. In comparison the
function argument stuff broke 30-40 packages, many of which still
don't build without -fallow-argument-mismatch.
Regarding the latter:
The initial patch was too strict – an also rejected valid code
(according to the Fortran 2018 standard). That has been fixed.* – Thus,
either some valid cases were missed (gfortran bug) or all those packages
indeed have an argument mismatch.
*That fix is: 2019-10-14 / r276972 / PR fortran/92004 /
https://gcc.gnu.org/ml/fortran/2019-10/msg00128.html
Do you know whether those 30–40 packages have code bugs or could there
be gfortran bugs (too strict checking) lurking?
Regarding the BOZ: One difference to the argument mismatch is that the
latter has an option to still accept it (-fallow-argument-mismatch) and
potentially generates wrong code – depending what the ME does with the
mismatches – while the former, once parsed, causes no potential ME
problems and as there is no flag, it always requires code changes. (On
the other hand, fixing the BOZ issue is straight forward; argument
changes are trickier.)
Cheers,
Tobias
