Linking error with C674X-MATHLIB 3.0.1.1

ReinierC

Other Parts Discussed in Thread: MATHLIB

Hi,

I'm trying to use the C674X-MATHLIB (v3.0.1.1) in my C++ application in CCS 5.2. I am aware of the annoying pragma issue, and by simply using the extern "C" as recommended in other posts, it made no difference. Instead I developed an interface C-file with wrapper functions that simply calls the C-functions of MATHLIB, and then I declared the wrapper functions as extern "C" in the interface header file.

The compilation of this approach works fine, but I'm getting linking errors in that a number of symbols are not found. I'm linking against the mathlib.a674 library in the mathlib_c674x_3_0_1_1\lib directory of C674X-MATHLIB. The following symbols are not found by the linker:

- All the vector versions of single point precision (possibly also the double precision, but I have not tested this), e.g. atan2sp_v, atansp_v, cossp_v, etc.

- logtable, kTable, jTable and V, which are located in mathlib_c674x_3_0_1_1\packages\ti\mathlib\src\common\tables.c

The vector versions are simply a for-loop which calls the inline version of the associated function and the other symbols are constants. By copying this code into my own source files, I managed to successfully compile and link. I find this strange because the linker found the normal math functions, e.g. atan2sp and atan2sp_i. Does this mean that the above mentioned functions and variables were not compiled into the supplied library or am I missing something very obvious here?

over 13 years ago

0 George Mock over 13 years ago

TI__Guru**** 251820 points

Please show the exact text of one of the linker error messages.

Thanks and regards,

-George

0 ReinierC over 13 years ago in reply to George Mock

Expert 2425 points

Hi George,

As requested:

The output from compiling my library that is using MATHLIB:

**** Build of configuration Debug for project slm_eigen_lib ****

C:\ti\ccsv5\utils\bin\gmake -k all
'Building file: ../src/eigen.cpp'
'Invoking: C6000 Compiler'
"C:/ti/ccsv5/tools/compiler/c6000_7.3.4/bin/cl6x" -mv6740 -g --include_path="C:/ti/ccsv5/tools/compiler/c6000_7.3.4/include" --include_path="C:/Texas Instruments/mathlib_c674x_3_0_1_1/packages" --include_path="C:/Texas Instruments/mathlib_c674x_3_0_1_1/inc" --display_error_number --diag_warning=225 --abi=coffabi --opt_for_speed=3 --preproc_with_compile --preproc_dependency="src/eigen.pp" --obj_directory="src" "../src/eigen.cpp"
'Finished building: ../src/eigen.cpp'
' '
'Building file: ../src/mathlib_if.c'
'Invoking: C6000 Compiler'
"C:/ti/ccsv5/tools/compiler/c6000_7.3.4/bin/cl6x" -mv6740 -g --include_path="C:/ti/ccsv5/tools/compiler/c6000_7.3.4/include" --include_path="C:/Texas Instruments/mathlib_c674x_3_0_1_1/packages" --include_path="C:/Texas Instruments/mathlib_c674x_3_0_1_1/inc" --display_error_number --diag_warning=225 --abi=coffabi --opt_for_speed=3 --preproc_with_compile --preproc_dependency="src/mathlib_if.pp" --obj_directory="src" "../src/mathlib_if.c"
'Finished building: ../src/mathlib_if.c'
' '
'Building file: ../src/utils.cpp'
'Invoking: C6000 Compiler'
"C:/ti/ccsv5/tools/compiler/c6000_7.3.4/bin/cl6x" -mv6740 -g --include_path="C:/ti/ccsv5/tools/compiler/c6000_7.3.4/include" --include_path="C:/Texas Instruments/mathlib_c674x_3_0_1_1/packages" --include_path="C:/Texas Instruments/mathlib_c674x_3_0_1_1/inc" --display_error_number --diag_warning=225 --abi=coffabi --opt_for_speed=3 --preproc_with_compile --preproc_dependency="src/utils.pp" --obj_directory="src" "../src/utils.cpp"
'Finished building: ../src/utils.cpp'
' '
'Building target: ../lib/slm_eigen_lib.lib'
'Invoking: C6000 Archiver'
"C:/ti/ccsv5/tools/compiler/c6000_7.3.4/bin/ar6x" r "../lib/slm_eigen_lib.lib" "./src/utils.obj" "./src/mathlib_if.obj" "./src/eigen.obj"
==> new archive '../lib/slm_eigen_lib.lib'
==> building archive '../lib/slm_eigen_lib.lib'
'Finished building target: ../lib/slm_eigen_lib.lib'
' '

**** Build Finished ****

The output from building my main project, that links against my library as build above:

**** Build of configuration Debug for project slm_eigen_test_app ****

C:\ti\ccsv5\utils\bin\gmake -k all
'Building file: ../main.tcf'
'Invoking: TConf'
"C:/ti/xdctools_3_23_03_53/tconf" -b -Dconfig.importPath="C:/ti/bios_5_41_13_42/packages;" "../main.tcf"
'Finished building: ../main.tcf'
' '
'Building file: maincfg.s??'
'Invoking: C6000 Compiler'
"C:/ti/ccsv5/tools/compiler/c6000_7.3.4/bin/cl6x" -mv6740 -g --include_path="C:/ti/ccsv5/tools/compiler/c6000_7.3.4/include" --include_path="D:/projects/slm_lib_c6748/slm_eigen_lib/inc" --include_path="C:/Texas Instruments/mathlib_c674x_3_0_1_1/packages" --include_path="C:/Texas Instruments/mathlib_c674x_3_0_1_1/inc" --include_path="D:/projects/slm_lib_c6748/slm_eigen_test_app/Debug" --include_path="C:/ti/bios_5_41_13_42/packages/ti/bios/include" --include_path="C:/ti/bios_5_41_13_42/packages/ti/rtdx/include/c6000" --display_error_number --diag_warning=225 --abi=coffabi --preproc_with_compile --preproc_dependency="maincfg.pp" "maincfg.s??"
'Finished building: maincfg.s??'
' '
'Building file: maincfg_c.c'
'Invoking: C6000 Compiler'
"C:/ti/ccsv5/tools/compiler/c6000_7.3.4/bin/cl6x" -mv6740 -g --include_path="C:/ti/ccsv5/tools/compiler/c6000_7.3.4/include" --include_path="D:/projects/slm_lib_c6748/slm_eigen_lib/inc" --include_path="C:/Texas Instruments/mathlib_c674x_3_0_1_1/packages" --include_path="C:/Texas Instruments/mathlib_c674x_3_0_1_1/inc" --include_path="D:/projects/slm_lib_c6748/slm_eigen_test_app/Debug" --include_path="C:/ti/bios_5_41_13_42/packages/ti/bios/include" --include_path="C:/ti/bios_5_41_13_42/packages/ti/rtdx/include/c6000" --display_error_number --diag_warning=225 --abi=coffabi --preproc_with_compile --preproc_dependency="maincfg_c.pp" "maincfg_c.c"
'Finished building: maincfg_c.c'
' '
'Building file: ../src/main.cpp'
'Invoking: C6000 Compiler'
"C:/ti/ccsv5/tools/compiler/c6000_7.3.4/bin/cl6x" -mv6740 -g --include_path="C:/ti/ccsv5/tools/compiler/c6000_7.3.4/include" --include_path="D:/projects/slm_lib_c6748/slm_eigen_lib/inc" --include_path="C:/Texas Instruments/mathlib_c674x_3_0_1_1/packages" --include_path="C:/Texas Instruments/mathlib_c674x_3_0_1_1/inc" --include_path="D:/projects/slm_lib_c6748/slm_eigen_test_app/Debug" --include_path="C:/ti/bios_5_41_13_42/packages/ti/bios/include" --include_path="C:/ti/bios_5_41_13_42/packages/ti/rtdx/include/c6000" --display_error_number --diag_warning=225 --abi=coffabi --preproc_with_compile --preproc_dependency="src/main.pp" --obj_directory="src" "../src/main.cpp"
"../src/main.cpp", line 52: warning #179-D: variable "j" was declared but never referenced
'Finished building: ../src/main.cpp'
' '
'Building target: slm_eigen_test_app.out'
'Invoking: C6000 Linker'
"C:/ti/ccsv5/tools/compiler/c6000_7.3.4/bin/cl6x" -mv6740 -g --display_error_number --diag_warning=225 --abi=coffabi -z -m"slm_eigen_test_app.map" --warn_sections --display_error_number -i"C:/ti/ccsv5/tools/compiler/c6000_7.3.4/lib" -i"D:/projects/slm_lib_c6748/slm_eigen_lib/lib" -i"D:/projects/slm_lib_c6748/slm_eigen_lib/inc" -i"C:/Texas Instruments/mathlib_c674x_3_0_1_1/packages" -i"C:/Texas Instruments/mathlib_c674x_3_0_1_1/lib" -i"C:/Texas Instruments/mathlib_c674x_3_0_1_1/inc" -i"C:/ti/ccsv5/tools/compiler/c6000_7.3.4/include" -i"C:/ti/bios_5_41_13_42/packages/ti/rtdx/lib/c6000" -i"C:/ti/bios_5_41_13_42/packages/ti/bios/lib" -i"C:/ti/bios_5_41_13_42/packages/ti/pscl/lib" -i"C:/ti/bios_5_41_13_42/packages/ti/pmi/lib" -i"C:/ti/bios_5_41_13_42/packages/ti/psl/lib" --reread_libs --rom_model -o "slm_eigen_test_app.out" -l"./maincfg.cmd" "./src/main.obj" "./maincfg_c.obj" "./maincfg.obj" -l"libc.a" -l"slm_eigen_lib.lib" -l"mathlib.a674"
<Linking>

undefined first referenced
symbol        in file
--------- ----------------
_atan2sp_v D:/projects/slm_lib_c6748/slm_eigen_lib/lib/slm_eigen_lib.lib<mathlib_if.obj>
_jTable    D:/projects/slm_lib_c6748/slm_eigen_lib/lib/slm_eigen_lib.lib<mathlib_if.obj>
_kTable    D:/projects/slm_lib_c6748/slm_eigen_lib/lib/slm_eigen_lib.lib<mathlib_if.obj>
_logtable D:/projects/slm_lib_c6748/slm_eigen_lib/lib/slm_eigen_lib.lib<mathlib_if.obj>

error #10234-D: unresolved symbols remain
error #10010: errors encountered during linking; "slm_eigen_test_app.out" not
   built

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

**** Build Finished ****

Note: I only changed the code back to its original form for atan2sp_v to illustrate the error.

0 George Mock over 13 years ago in reply to ReinierC

TI__Guru**** 251820 points

Reinier Coetzer said:
undefined first referenced
symbol        in file
--------- ----------------
_atan2sp_v D:/projects/slm_lib_c6748/slm_eigen_lib/lib/slm_eigen_lib.lib<mathlib_if.obj>
_jTable    D:/projects/slm_lib_c6748/slm_eigen_lib/lib/slm_eigen_lib.lib<mathlib_if.obj>
_kTable    D:/projects/slm_lib_c6748/slm_eigen_lib/lib/slm_eigen_lib.lib<mathlib_if.obj>
_logtable D:/projects/slm_lib_c6748/slm_eigen_lib/lib/slm_eigen_lib.lib<mathlib_if.obj>

I presume you expect this function and data tables to be supplied by mathlib.a674. Well, they are not there. I used the name utility nm6x (documented in the C6000 Assembly Language Tools User's Guide) to check. First I checked for any function that includes the name atan2 ...

C:\Program Files\Texas Instruments\mathlib_c674x_3_0_1_1\lib>nm6x -g mathlib.a674 | find "atan2"
000001d0 T _atan2dp
00000000 T _atan2sp

I see those two functions, but no _atan2sp_v.

Next I checked for anything that includes the name table, in upper or lower case ...

C:\Program Files\Texas Instruments\mathlib_c674x_3_0_1_1\lib>nm6x -g mathlib.a674 | find /i "table"
00000038 D Expon_Ctable
00000000 D Expon_Ktable
00000000 D expon_ctable
00000000 D expon_ktable
00000000 D exp_ctable
00000000 D exp_ktable
00000000 D Logtable_asm
00000000 D log_table_asm

I can see those tables, but not _jTable, _kTable, or _logtable. (Side note: It is interesting how none of these names start with an underscore. I suspect they are all defined in hand-coded assembly, and may not be intended for use by code outside the library.)

The bottom line is that those functions and data tables referenced by matlib_if.c are not in matlib.a674.

Thanks and regards,

-George

0 ReinierC over 13 years ago in reply to George Mock

Expert 2425 points

Hi George,

Thank you for confirming what I suspected.

Some indication of this in the documentation would be desireable and would have saved me quite some time!

Regards

Reinier

0 Saurabh Kumar Singh over 13 years ago

Prodigy 235 points

Hello Reinier.

Would be possible for you to post the C interface that you have developed for MATHLIB here?

0 ReinierC over 13 years ago in reply to Saurabh Kumar Singh

Expert 2425 points

Example of the C header:

<code>

#ifndef MATHLIB_IF_H_
#define MATHLIB_IF_H_

#ifdef __cplusplus
extern "C" {
#endif

//----------------------------------------------------------------------------------
// atan2 Single precision wrapper functions
//----------------------------------------------------------------------------------
void atan2sp_v_wrapper(float *a, float *b, float *output, int size);
float atan2sp_wrapper(float a, float b);
float atan2sp_i_wrapper(float a, float b);

#ifdef __cplusplus
}
#endif

#endif /* MATHLIB_IF_H_ */

</code>

Example of C source file

<code>

#include <mathlib.h>

#include "mathlib_if.h"

// Log table
double logtable[8] = {
   0.0000000000,            //
-0.1177830356,            //
-0.2231435513,            //
-0.3184537311,            //
-0.4054651081,            //
-0.4855078157,            //
-0.5596157879,            //
-0.6286086594             //
};

// kTable
double kTable[4] = {
1.000000000,              // 2^(0/4)
1.189207115,              // 2^(1/4)
1.414213562,              // 2^(2/4)
1.681792831               // 2^(3/4)
};

// jTable
double jTable[4] = {
1.000000000,              // 2^(0/16)
1.044273782,              // 2^(1/16)
1.090507733,              // 2^(2/16)
1.138788635               // 2^(3/16)
};

double V[4] = {
0.00000000000000000000,   //
0.52359877559829887308,   //
1.57079632679489661923,   //
1.04719755119659774615    //
};

//----------------------------------------------------------------------------------
//   atan2 Single precision wrapper functions
//----------------------------------------------------------------------------------
void atan2sp_v_wrapper(float *a, float *b, float *output, int size) {

   int i;

   for (i = 0; i < size; i++) {
      output[i] = atan2sp_i (a[i],b[i]);
   }
}

float atan2sp_wrapper(float a, float b) {

   return atan2sp(a, b);
}

float atan2sp_i_wrapper(float a, float b) {

   return atan2sp_i(a, b);
}

</code>

The rest of the wrapper functions you can just implement yourself in a similar fashion.

Regards

Reinier

0 Saurabh Kumar Singh over 13 years ago in reply to ReinierC

Prodigy 235 points

Hello Reinier.

Thank you for posting the code developed by you. It was very helpful.

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Linking error with C674X-MATHLIB 3.0.1.1