How to Include and Link Mathlib's log10sp_v ?

Ryan,

After linking, can you see log10sp_v listed in the application's map file to confirm that it was linked in?  Do you see any link warnings or errors?

Can you describe more what you mean by “but trying to call log10sp_v in the same location does not work”.  Does this result in a build error, or a runtime error?

Also, I think this thread from the compiler forum may help: http://e2e.ti.com/support/development_tools/compiler/f/343/t/131313.aspx?pi67643=1

Scott

Scott,

Sorry for not being too clear. I was unable to link log10sp_v.obj. Here is my message on the Console:

<Linking>

undefined first referenced
symbol in file
--------- ----------------
logtable ./log10sp_v.obj

error: unresolved symbols remain
error: errors encountered during linking; "Matchbox.out" not built

>> Compilation failure
gmake: *** [Matchbox.out] Error 1
gmake: Target `all' not remade because of errors.

In my project, I could call log10dp_v() without any build or linking errors, then when I tried switching that to log10sp_v(), I had no build errors, but had linking errors.

Ryan

Ryan,

OK, thanks. 

So you are able to use log10dp_v() in your application, but not log10sp_v()?  From the compiler forum thread I’d pointed to these objects should reside in the same library.  Strange indeed!

Can you run the archiver on your math library (as described in that compiler forum thread) to confirm that both objects are indeed in the library?

I’ll also send a TI-internal email to the math library team to see if they can comment…

Scott

Scott,

In the mentioned thread's example, they use the command , "C:\Program Files\Texas Instruments\c67xmathlib_2_01_00_00\lib>ar6x -t c67xfastMath.lib" . I'm not using c67xfastmathlib, I'm using the mathlib_c66x_3_0_1_1 library. What should my query be?

Ryan

Ryan,

You should use a similar command line, but specify your math library name in place of the “c67xfastMath.lib”.

Scott

Scott, 

I'm still not sure what that lib file would be ( ie, what is the filename I should use?). Here are the contents of my mathlib/lib folder:

C:\ti\mathlib_c66x_3_0_1_1\lib>ls
ar6x.exe macros.ini mathlib.a66 mathlib.a66e mathlib.ae66 mathlib.ae66e

C:\ti\mathlib_c66x_3_0_1_1\lib>

Ryan

Scott,

I think I understand what I was supposed to type:

C:\ti\mathlib_c66x_3_0_1_1\lib>ar6x -t mathlib.ae66

SIZE DATE FILE NAME
-------- ------------------------ ---------------
2300 Mon Feb 06 15:25:39 2012 atan2dp.obj
1357 Mon Feb 06 15:27:24 2012 atan2sp.obj
1865 Mon Feb 06 15:28:59 2012 atandp.obj
1187 Mon Feb 06 15:30:44 2012 atansp.obj
1443 Mon Feb 06 15:33:23 2012 cosdp.obj
1031 Mon Feb 06 15:35:04 2012 cossp.obj
871 Mon Feb 06 15:37:24 2012 divdp.obj
839 Mon Feb 06 15:39:00 2012 divsp.obj
1667 Mon Feb 06 15:40:40 2012 exp10dp.obj
1512 Mon Feb 06 15:42:17 2012 exp10sp.obj
1688 Mon Feb 06 15:43:51 2012 exp2dp.obj
1508 Mon Feb 06 15:45:28 2012 exp2sp.obj
1629 Mon Feb 06 15:47:12 2012 expdp.obj
1475 Mon Feb 06 15:48:50 2012 expsp.obj
1751 Mon Feb 06 15:50:29 2012 log10dp.obj
1376 Mon Feb 06 15:52:01 2012 log10sp.obj
1736 Mon Feb 06 15:53:30 2012 log2dp.obj
1443 Mon Feb 06 15:55:00 2012 log2sp.obj
1726 Mon Feb 06 15:56:23 2012 logdp.obj
1438 Mon Feb 06 15:57:49 2012 logsp.obj
1377 Mon Feb 06 15:59:38 2012 powdp.obj
1269 Mon Feb 06 16:07:58 2012 powsp.obj
875 Mon Feb 06 16:22:35 2012 recipdp.obj
843 Mon Feb 06 16:24:22 2012 recipsp.obj
971 Mon Feb 06 16:26:00 2012 rsqrtdp.obj
875 Mon Feb 06 16:27:30 2012 rsqrtsp.obj
1443 Mon Feb 06 16:28:42 2012 sindp.obj
1031 Mon Feb 06 16:29:57 2012 sinsp.obj
1041 Mon Feb 06 16:31:13 2012 sqrtdp.obj
1009 Mon Feb 06 16:32:19 2012 sqrtsp.obj

C:\ti\mathlib_c66x_3_0_1_1\lib>

Ryan,

Yes, this is what I was asking for.  Both the “log10dp.obj” and “log10sp.obj” objects reside in the library.  So it is very strange that simply changing the function name at the same call site would be OK in one case, but cause a linker error in the other.

I don’t know which library is being linked in your app.  You should be able to see the specific library referenced in the map file.  If it is one of the other three libraries you can double check that these objects both exist in that library too.

I’d sent that ping to the math library team asking them to look at this forum thread.  Hopefully they can reply back with an answer or suggestion soon…

Scott

Scott,

I'm not sure what exactly is being done, but I followed the solution in http://e2e.ti.com/support/development_tools/compiler/f/343/p/206048/730549.aspx#730549 and that allowed my code to build and link. I'm not sure it is correct, and I can't imagine why I must do this, but it finally linked.

How do I reach the MATHLIB team for their help?

Ryan

Ryan,

OK, thanks for the update.  I’m glad to hear your program is linking OK now.  

I cannot give you the direct contact information, but I just sent another ping asking for a reply to this forum thread.

Hope you will hear something soon…

Scott