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

On 2019-09-03 21:59, Anton Gladky wrote:
> 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?

I confirm it's a regression due introduced by GCC 9. I have reported the
bug upstream: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91769


Until this bug is fixed, you can use the following workaround:

--- gnuplot-5.2.6+dfsg1.orig/src/axis.c
+++ gnuplot-5.2.6+dfsg1/src/axis.c
@@ -2698,6 +2698,9 @@ map_y(double value)
  * If update is TRUE then check and update rrange autoscaling
  */
 coord_type
+#ifdef __mips
+__attribute__((optimize("-O1")))
+#endif
 polar_to_xy( double theta, double r, double *x, double *y, TBOOLEAN update)
 {
     coord_type status = INRANGE;

-- 
Aurelien Jarno                          GPG: 4096R/1DDD8C9B
[email protected]                 http://www.aurel32.net