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Basics, Building SPICE Applications (C)

Table of Contents 

   Basics, Building SPICE Applications (C)
      Note About HTML Links
      Environment Set-up
         Unix/Linux
         Windows
      A simple example program
         Unix/Linux
         Windows


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Basics, Building SPICE Applications (C)




May 21, 2018



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Note About HTML Links



The HTML version of this lesson contains links pointing to various HTML documents provided with the Toolkit. All of these links are relative and, in order to function, require this document to be in a certain location in the Toolkit HTML documentation directory tree.

In order for the links to be resolved, if not done already by installing the lessons package under the Toolkit's ``doc/html'' directory, create a subdirectory called ``lessons'' under the ``doc/html'' directory of the ``cspice/'' tree and copy this document to that subdirectory before loading it into a Web browser.



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Environment Set-up





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Unix/Linux



Assume CSPICE is installed at /naif/cspice/. The corresponding path for the CSPICE library being /naif/cspice/lib/cspice.a.



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Windows



Assume CSPICE is installed C:\naif\cspice\. The corresponding path for the CSPICE library being C:\naif\cspice\lib\cspice.lib.

The standard installation of Microsoft Visual Studio or Visual Toolkit may not update environment variables needed to use the compiler (cl) from the standard DOS shell.

Environment variables for "cl" - Visual Studio 7: 

   INCLUDE
   C:\Program Files\Microsoft Visual Studio .NET\Vc7\include\
   C:\Program Files\Microsoft Visual Studio .NET\FrameworkSDK\include\
 
   LIB
   C:\Program Files\Microsoft Visual Studio .NET\Vc7\lib\
   C:\Program Files\Microsoft Visual Studio .NET\FrameworkSDK\Lib\
 
   PATH
   C:\Program Files\Microsoft Visual Studio .NET\Vc7\bin\
 
   To set Windows environment variables (GUI):
    Control Panel -> System
                     select "Advanced" tab
                     push "Environment Variables" button
                     chose variable name in either your user environment
                         window or the system window (if you have
                         admin rights)
                     push "Edit" button
                     paste-in or type path strings


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A simple example program



File tk_ver.c:

This program calls the CSPICE function 'tkvrsn_c' then outputs the return value. 

   #include <stdio.h>
   #include "SpiceUsr.h"
 
   int main()
      {
      ConstSpiceChar  * versn;
 
      versn = tkvrsn_c( "TOOLKIT" );
 
      printf( "Toolkit version %s\n", versn );
 
      return(0);
      }


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Unix/Linux



This example uses the GNU C compiler (gcc): 

   skynet 39: gcc tk_ver.c -o tk_ver -I/naif/cspice/include \
                  /naif/cspice/lib/cspice.a -lm
 
   skynet 40: ./tk_ver
   Toolkit version CSPICE_N0061
SPICE library naming does not conform to the UNIX convention of libname.a for use with the -L/path_to_libs/ -lname_of_lib compile options.



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Windows



This example uses the Microsoft Visual Studio 7 C compiler (cl): 

   > cl tk_ver.c -IC:\naif\cspice\include C:\naif\cspice\lib\cspice.lib
 
   > tk_ver
   Toolkit version: N0061