Re: how to link math.h

Altera_Forum · ‎05-19-2006

hi all

When I run a program with trigonometric function like sin, cos,tan etc..

I get errors:

<div class='quotetop'>QUOTE </div>

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[jay@localhost test]$ nios2-linux-uclibc-gcc test.c -o test -elf2flt

test.elf2flt(.text+0x6c): In function `main':

: undefined reference to `sin'

collect2: ld returned 1 exit status[/b]

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#include<math.h># include<tgmath.h>
main()
{
double angle;
angle = asin (60);
printf("angle = %f\n",angle);
}

What should I do?

thx in advance !

Altera_Forum · ‎05-19-2006

I have similar problem,too.

But my problem is "#include<asm/io.h> ",why?

Thanks!!

Altera_Forum · ‎05-19-2006

I found the method to solve problem from the network.

need to add the "-lm" in command

nios2-linux-uclibc-gcc test.c -o test -elf2flt -lm

Altera_Forum · ‎05-19-2006

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originally posted by wolaiye3@May 19 2006, 01:33 PM

i have similar problem,too.

but my problem is "#include<asm/io.h> ",why?

thanks!!

<div align='right'><{post_snapback}> (index.php?act=findpost&pid=15467)

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hi,

perhaps u have to specify the whole path of io.h like the following for example :# include <C:\altera\kits\nios2\bin\eclipse\workspace\kernel\build\include\nios2_system.h>

http://forum.niosforum.com/work2/style_emoticons/<#EMO_DIR#>/rolleyes.gif

Altera_Forum · ‎05-22-2006

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originally posted by sdhnain+may 20 2006, 01:57 am--><div class='quotetop'>quote (sdhnain @ may 20 2006, 01:57 am)</div>

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<!--quotebegin-wolaiye3@May 19 2006, 01:33 PM

i have similar problem,too.

but my problem is "#include<asm/io.h> ",why?

thanks!!

<div align='right'><{post_snapback}> (index.php?act=findpost&pid=15467)

--- quote end ---

--- Quote End ---

hi,

perhaps u have to specify the whole path of io.h like the following for example :# include <C:\altera\kits\nios2\bin\eclipse\workspace\kernel\build\include\nios2_system.h>

http://forum.niosforum.com/work2/style_emoticons/<#EMO_DIR#>/rolleyes.gif

<div align='right'><{post_snapback}> (index.php?act=findpost&pid=15470)</div>

[/b]

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Thanks!! http://forum.niosforum.com/work2/style_emoticons/<#EMO_DIR#>/laugh.gif

Altera_Forum · ‎05-24-2006

Hi wolaiye and jay.

I meet the same problem?

did you solve the problem? and how to ?

I try to and full path, but it don't solve the problem.

Altera_Forum · ‎05-24-2006

--- Quote Start ---

originally posted by zzh@May 24 2006, 08:36 AM

hi wolaiye and jay.

i meet the same problem?

did you solve the problem? and how to ?

i try to and full path, but it don't solve the problem.

<div align='right'><{post_snapback}> (index.php?act=findpost&pid=15548)

--- quote end ---

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hi zzh

i can link math.h lib and use math function in my app program,now.

when i use pio ports that copy "nios2system.h" to my app folder with using include "nios2system.h".

so i don't meet other problems about path yet..........

jay