GSoC 2019 : POSIX Complaince - Fenv methods not returning expected outputs.

[Vaibhav Gupta]

Hello,
In yesterday's weekly meeting I mentioned about fenv problems I faced while
developing testsuite.
.
Here is a very raw patch of my code as testsuite is still in development.
.
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Error 1
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I took three float values:
a = 0.0
b = 1.0
c = b/a
This should have automatically raised FE_DIVBYZERO exception, which does
not happens.
No exception flag is set.
.
.
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Error 2
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Then I tried to raise an exception manually using feraiseexcept(), but this
operation was also unsuccessful .
The method returned 1 on execution, but it should return 0 on successful
operation.
.
.
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Warning
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As mentioned in opengroup I tried to define a pragma
https://pubs.opengroup.org/onlinepubs/009696799/basedefs/fenv.h.html
.
#pragma STDC FENV_ACCESS ON
.
But this pragma is ignored while 'make -j 2'
/home/varodek/development/rtems/kernel/rtems/c/src/../../testsuites/psxtests/psxfenv01/init.c:50:
warning: ignoring #pragma STDC FENV_ACCESS [-Wunknown-pragmas]

.
.

--Vaibhav Gupta
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