Re: gcc-6 fails to compile a valid code
Hi Robert,
>Actually it was me, who posted the code. I've just seen your e-mail
>after the issue was re-assigned back to ucl.
oops, sorry!
>I can still reproduce the issue on i386, but I guess you use amd64. In
true, indeed
>such a case you need to replace `4' with `8' (the value `4' was expanded>from sizeof(long) by the macro included at the bottom of my previous
>e-mail):
oops, sure
>(experimental_amd64-dchroot)robert@barriere:~$ gcc-5 ./test.c
>/usr/lib/gcc/x86_64-linux-gnu/5/../../../x86_64-linux-gnu/crt1.o: In
>function `_start':
>(.text+0x20): undefined reference to `main'
you need a -c there :)
>
>I've found quite similar gcc bug
>https://gcc.gnu.org/bugzilla/show_bug.cgi?id=55009
>
>The reasoning given there suggests that you are right, and this is not
>gcc bug, as the expression 1l << 63 on amd64 or 1l << 31 on i386
>involves undefined behaviour.
>
>I'll try to fix the issue at ucl side by switching to _Static_assert.
not sure, feel free to investigate more :)
thanks for the heads up!
cheers,
Gianfranco
Reply to: