On Sun, 15 Sep 2024, Pali Rohár wrote:
gcc 8+ throws warning during imaxdiv.c compilation:
misc/imaxdiv.c:34:1: warning: ‘lldiv’ alias between functions of incompatible types
‘lldiv_t(long long int, long long int)’ {aka ‘struct <anonymous>(long long int,
long long int)’} and ‘imaxdiv_t(intmax_t, intmax_t)’ {aka ‘struct <anonymous>(long
long int, long long int)’} [-Wattribute-alias]
lldiv (long long, long long);
^~~~~
misc/imaxdiv.c:23:1: note: aliased declaration here
imaxdiv(intmax_t numer, intmax_t denom)
lldiv_t and imaxdiv_t structures are compatible, they have same members,
just defined for each function separately. This is how they are defined
also in MS VC++ header files.
Warning could be avoided by using typedef between structures, but this may
cause problems for C++ applications which overloaded functions which have
lldiv_t or imaxdiv_t parameters.
So rather locally disable this warning for gcc. Current code should be OK.
---
mingw-w64-crt/misc/imaxdiv.c | 11 +++++++++++
1 file changed, 11 insertions(+)
This seems ok, so I pushed it.
I wasn't able to trigger any warning for this with Clang, even if using
-Weverything -pedantic.
// Martin
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