Re: [gnuplot:bugs] #2195 html fails to compile on mipsel platform

Dear mips porters,

I am maintaining the gnuplot in the Debian and there is a segfault on the
mipsel, what I reported to upstream [1].

There is a question from the gnuplot author, which I am not able to response.
Could you please have a look?

It segfaults somewhere in the static global structure. And the problem appeared
recently, maybe due to the GCC-9 migration. There were not problems with GCC-8.
Some regressions?

[1] https://sourceforge.net/p/gnuplot/bugs/2195/

Thank you

Anton

Am Di., 3. Sept. 2019 um 21:27 Uhr schrieb Ethan Merritt
<[email protected]>:
>
> This trace does not make sense to me.
> The code lines highlighted are:
>
>    } else if (r >= R_AXIS.min) {
>         /* We store internally as if plotting r(theta) - rmin */
>         r = r - R_AXIS.min;
>
> R_AXIS is a static global structure that has been accessed repeated in the immediately preceding code, so I don't see any way it could cause a segfault here. r is a parameter to this routine so I would expect it to be on the stack (but I don't know mipsel compiler calling conventions so maybe not). Could the compiler somehow be setting a read-only flag that prevents modifying a local parameter?