SIGSEGV Exception in arccos function
lazarus / 12-Debugger

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Leymarie · 2007-10-03 16:15

Hello,

I’m working since 2 weeks to convert an Delphi simulation program into
Lazarus to work on a Linux platform. After 2 weeks, the code is
compiled on the Linux platform but I had some problem with the arccos
function of the math unit.

Arccos(0.5) return : External SIGSEGV Exception !!! and arccos(0.499)
works

The arccos function should works on the -1,1 segment !!!

People could help me ?

thanks

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antonio · 2007-10-03 17:58

Is unit Math platform specific? I can't reproduce that on WinXP.

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Leymarie · 2007-10-04 07:58

Hi,

Thank you for your response. I have also no problem on W2k ...

On my Linux plateform the arccos function give the right value from
-0.4999 to 0.4999 but I have always a problem above 0.5.

I tried directly arccos(0.5) or by using a variable

temp:=0.5;
arccos(temp); with temp define as single, double, real or extended.
there is no difference ... always the same
SIGSEGV exception

thanks in advance for your help

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Leymarie · 2007-10-04 08:13

a new information is, on my linux platform
arccos(1.1) return Invalid argument exception wich is normal for
arccos function

so, this function read the argument in a proper way ...