The new doctesting framework (#12415) on Solaris gives lots of warnings like
sage -t --long devel/sage/sage/plot/plot.py
**********************************************************************
File "devel/sage/sage/plot/plot.py", line 236, in sage.plot.plot
Failed example:
(g1+g2).show(ticks=pi/6, tick_formatter=pi) # show their sum,
nicely formatted
Expected nothing
Got:
Warning: invalid value encountered in isinf
Warning: invalid value encountered in isinf
Warning: invalid value encountered in isinf
[...]
Warning: invalid value encountered in isinf
Warning: invalid value encountered in isinf
Warning: invalid value encountered in isinf
These warnings are actually harmless and are indirectly caused by the
fact that Python doesn't find the isinf() C library function. From
spkg/logs/python-2.7.3.p5.log:
[...]
checking whether isinf is declared... no
checking whether isnan is declared... yes
checking whether isfinite is declared... no
[...]
These functions are defined by C99 and Python's configure does find
isinf and isfinite when compiled with -D__C99FEATURES__. So we should
add a compiler flag to fix this. Needs review:
http://trac.sagemath.org/sage_trac/ticket/14265
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