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<p class="MsoNormal" style="word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕";color:#1F497D">Hello, Jinhyun~<o:p></o:p></span></p>
<p class="MsoNormal" style="word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕";color:#1F497D">As I said, in my case the –lm option had been given only to the compile command and not the link command.<o:p></o:p></span></p>
<p class="MsoNormal" style="word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕";color:#1F497D">After I add it to the link command, I can link it. (so it was because of an error in my Makefile).<o:p></o:p></span></p>
<p class="MsoNormal" style="word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕";color:#1F497D">Hi, all,<o:p></o:p></span></p>
<p class="MsoNormal" style="word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕";color:#1F497D">By the way, I found printf(“PI = %f \n”, 3.1415) prints only “PI = f”. Anybody know in what case this happens?<o:p></o:p></span></p>
<p class="MsoNormal" style="word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕";color:#1F497D">In my another program, it prints ok, so it is a build problem..<o:p></o:p></span></p>
<p class="MsoNormal" style="word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕";color:#1F497D">Thanks!<o:p></o:p></span></p>
<p class="MsoNormal" style="word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal" style="word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕";color:#1F497D">Chan<o:p></o:p></span></p>
<p class="MsoNormal" style="word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕";color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif"> Jinhyun [mailto:jinhyun@konkuk.ac.kr]
<br>
<b>Sent:</b> Monday, November 14, 2016 10:57 AM<br>
<b>To:</b> </span><span style="font-size:11.0pt">김찬</span><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif"> <ckim@etri.re.kr><br>
<b>Cc:</b> users@rtems.org<br>
<b>Subject:</b> RE: how to use powf or ceilingf function in rtems..<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal" style="word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕"">Hi,<o:p></o:p></span></p>
<p class="MsoNormal" style="word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕"">I succeed to use powf function in another function without any touch on hello example of rtems-exampls-v2.<o:p></o:p></span></p>
<p class="MsoNormal" style="word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕"">I configured RTEMS-4.12 for i386 and use pc386 BSP.<o:p></o:p></span></p>
<p class="MsoNormal" style="word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕""><o:p> </o:p></span></p>
<p class="MsoNormal" style="word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕"">My command for configuration is:<o:p></o:p></span></p>
<p class="MsoNormal" style="word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕""> $ configure --target-i386-rtems4.12 --enable-bsp=pc386 --enable-posix --enable-networking<o:p></o:p></span></p>
<p class="MsoNormal" style="word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕"">I use rtems-source-builder for building RTEMS tool sets.<o:p></o:p></span></p>
<p class="MsoNormal" style="word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕"">And hello example codes are as below.<o:p></o:p></span></p>
<p class="MsoNormal" style="word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕"">/*<o:p></o:p></span></p>
<p class="MsoNormal" style="word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕"">* Classic API Hello World<o:p></o:p></span></p>
<p class="MsoNormal" style="word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕"">*/<o:p></o:p></span></p>
<p class="MsoNormal" style="word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕""><o:p> </o:p></span></p>
<p class="MsoNormal" style="word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕"">#include <rtems.h><o:p></o:p></span></p>
<p class="MsoNormal" style="word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕"">#include <stdlib.h><o:p></o:p></span></p>
<p class="MsoNormal" style="word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕"">#include <stdio.h><o:p></o:p></span></p>
<p class="MsoNormal" style="word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕"">#include <math.h><o:p></o:p></span></p>
<p class="MsoNormal" style="word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕""><o:p> </o:p></span></p>
<p class="MsoNormal" style="word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕"">void another_func(void){<o:p></o:p></span></p>
<p class="MsoNormal" style="word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕""> printf( "powf: %f\n", powf(0.2, 4));<o:p></o:p></span></p>
<p class="MsoNormal" style="word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕"">}<o:p></o:p></span></p>
<p class="MsoNormal" style="word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕""><o:p> </o:p></span></p>
<p class="MsoNormal" style="word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕"">rtems_task Init(<o:p></o:p></span></p>
<p class="MsoNormal" style="word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕""> rtems_task_argument ignored<o:p></o:p></span></p>
<p class="MsoNormal" style="word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕"">)<o:p></o:p></span></p>
<p class="MsoNormal" style="word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕"">{<o:p></o:p></span></p>
<p class="MsoNormal" style="word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕""> printf( "\n\n*** HELLO WORLD TEST ***\n" );<o:p></o:p></span></p>
<p class="MsoNormal" style="word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕""> printf( "Hello World\n" );<o:p></o:p></span></p>
<p class="MsoNormal" style="word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕""> printf( "*** END OF HELLO WORLD TEST ***\n" );<o:p></o:p></span></p>
<p class="MsoNormal" style="word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕""> another_func();<o:p></o:p></span></p>
<p class="MsoNormal" style="word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕""> exit( 0 );<o:p></o:p></span></p>
<p class="MsoNormal" style="word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕"">}<o:p></o:p></span></p>
<p class="MsoNormal" style="word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕""><o:p> </o:p></span></p>
<p class="MsoNormal" style="word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕"">/* configuration information */<o:p></o:p></span></p>
<p class="MsoNormal" style="word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕""><o:p> </o:p></span></p>
<p class="MsoNormal" style="word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕"">#include <bsp.h><o:p></o:p></span></p>
<p class="MsoNormal" style="word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕""><o:p> </o:p></span></p>
<p class="MsoNormal" style="word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕"">/* NOTICE: the clock driver is explicitly disabled */<o:p></o:p></span></p>
<p class="MsoNormal" style="word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕"">#define CONFIGURE_APPLICATION_DOES_NOT_NEED_CLOCK_DRIVER<o:p></o:p></span></p>
<p class="MsoNormal" style="word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕"">#define CONFIGURE_APPLICATION_NEEDS_CONSOLE_DRIVER<o:p></o:p></span></p>
<p class="MsoNormal" style="word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕"">#define CONFIGURE_USE_DEVFS_AS_BASE_FILESYSTEM<o:p></o:p></span></p>
<p class="MsoNormal" style="word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕""><o:p> </o:p></span></p>
<p class="MsoNormal" style="word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕"">#define CONFIGURE_RTEMS_INIT_TASKS_TABLE<o:p></o:p></span></p>
<p class="MsoNormal" style="word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕"">#define CONFIGURE_MAXIMUM_TASKS 1<o:p></o:p></span></p>
<p class="MsoNormal" style="word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕""><o:p> </o:p></span></p>
<p class="MsoNormal" style="word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕"">#define CONFIGURE_INIT<o:p></o:p></span></p>
<p class="MsoNormal" style="word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕"">#include <rtems/confdefs.h><o:p></o:p></span></p>
<p class="MsoNormal" style="word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕"">/* end of file */<o:p></o:p></span></p>
<p class="MsoNormal" style="word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕""><o:p> </o:p></span></p>
<p class="MsoNormal" style="word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕"">I hope that these will help you.<o:p></o:p></span></p>
<p class="MsoNormal" style="word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕"">Jin-Hyun<o:p></o:p></span></p>
<p class="MsoNormal" style="word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕""><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif"> users [<a href="mailto:users-bounces@rtems.org">mailto:users-bounces@rtems.org</a>]
<b>On Behalf Of </b></span><span style="font-size:11.0pt">김찬</span><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif"><br>
<b>Sent:</b> Sunday, November 13, 2016 10:54 PM<br>
<b>To:</b> <a href="mailto:joel@rtems.org">joel@rtems.org</a><br>
<b>Cc:</b> <a href="mailto:rtems-users@rtems.org">rtems-users@rtems.org</a> <<a href="mailto:users@rtems.org">users@rtems.org</a>><br>
<b>Subject:</b> RE: how to use powf or ceilingf function in rtems..<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal" style="word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕";color:#1F497D">Thanks, Joel,<o:p></o:p></span></p>
<p class="MsoNormal" style="word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕";color:#1F497D">I added the
</span><span style="font-size:10.0pt;font-family:"맑은 고딕";color:#1F497D">‘<span lang="EN-US">-lm</span>’
<span lang="EN-US">option using XCFLAGS variable (which should be extra compile flags).<o:p></o:p></span></span></p>
<p class="MsoNormal" style="word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕";color:#1F497D">So the
</span><span style="font-size:10.0pt;font-family:"맑은 고딕";color:#1F497D">‘<span lang="EN-US">-lm</span>’<span lang="EN-US"> option was given to the compile command (-c) only and was not being given to the link command. So I added
</span>–<span lang="EN-US">lm option at the end of COBJS list in my Makefile.base (which my Makefile includes).<o:p></o:p></span></span></p>
<p class="MsoNormal" style="word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕";color:#1F497D">I tried using XLDCONFIGS but it didn</span><span style="font-size:10.0pt;font-family:"맑은 고딕";color:#1F497D">’<span lang="EN-US">t</span>’<span lang="EN-US">
work I don</span>’<span lang="EN-US">t know why.<o:p></o:p></span></span></p>
<p class="MsoNormal" style="word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕";color:#1F497D">Thanks!<o:p></o:p></span></p>
<p class="MsoNormal" style="word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕";color:#1F497D">Chan
<o:p></o:p></span></p>
<p class="MsoNormal" style="word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif"> Joel Sherrill [<a href="mailto:joel@rtems.org">mailto:joel@rtems.org</a>]
<br>
<b>Sent:</b> Saturday, November 12, 2016 11:37 PM<br>
<b>To:</b> </span><span style="font-size:11.0pt">김찬</span><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif"> <<a href="mailto:ckim@etri.re.kr">ckim@etri.re.kr</a>><br>
<b>Cc:</b> <a href="mailto:rtems-users@rtems.org">rtems-users@rtems.org</a> <<a href="mailto:users@rtems.org">users@rtems.org</a>><br>
<b>Subject:</b> Re: how to use powf or ceilingf function in rtems..<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p><span lang="EN-US">On Nov 12, 2016 4:44 AM, "</span>김찬<span lang="EN-US">" <<a href="mailto:ckim@etri.re.kr">ckim@etri.re.kr</a>> wrote:<br>
><br>
> Hello,<br>
><br>
> I</span>’<span lang="EN-US">m trying to make an rtems application which uses some math function.<br>
><br>
> I put #include <math.h>. When the powf function is in the Init() function, it works,<br>
><br>
> But when powf is called from another function(I want to call this function from Init..), I get
</span>‘<span lang="EN-US">undefined reference to powf</span>’<span lang="EN-US"> error.<br>
><br>
> I tried merning the files into one but it is the same. What can be the problem?<o:p></o:p></span></p>
<p><span lang="EN-US">You should only have to include math.h and link against libm. There should be nothing odd.<o:p></o:p></span></p>
<p><span lang="EN-US">My first guess is that the -lm argument is before the other .o on the link command.<o:p></o:p></span></p>
<p><span lang="EN-US">Check that and if that isn't it, can you produce an example?<o:p></o:p></span></p>
<p><span lang="EN-US">> Thanks!<br>
><br>
> Chan Kim<br>
><br>
> <br>
><br>
> </span>김 찬<span lang="EN-US"> (Chan Kim)<br>
><br>
> </span>책임연구원<span lang="EN-US">, </span>프로세서연구실<span lang="EN-US">, </span>지능형반도체연구부<span lang="EN-US"><br>
><br>
> </span>한국전자통신연구원<span lang="EN-US"><br>
><br>
> O) 042-860-5773 C) 010-3418-9152 E) <a href="mailto:ckim@etri.re.kr">ckim@etri.re.kr</a><br>
><br>
> <br>
><br>
><br>
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