Skip to content

include C functions from nmath in my own C functions

2 messages · yyan liu, Brian Ripley

Original
yyan liu
# 
Hi:
  I followed the README in src/nmath/standalone/
to make the use the command "make shared" to make the
libRmath.so file. I also add the directories containg
libRmath.so to  LD_LIBRARY_PATH by using command 
"export
LD_LIBRARY_PATH=$LD_LIBRARY_PATH:$/home/zhliu/Backup/R-2.0.1/src/nmath/standalon
    e
"
However, when I try to run the following codes. 
/***********************************************/
#define MATHLIB_STANDALONE 1
#include <Rmath.h>

int
main()
{
/* something to force the library to be included */
    qnorm(0.7, 0.0, 1.0, 0, 0); 
    return 0;
}
/**************************************************/

It gives me the following error message. It seems
definitions of some R functions can not be found in
the libRmath.so file. Anyone has any idea about this
problem? Thank you very much!


/usr/local/lib/libRmath.so: undefined reference to
`expm1'
/usr/local/lib/libRmath.so: undefined reference to
`log'
/usr/local/lib/libRmath.so: undefined reference to
`sqrt'
/usr/local/lib/libRmath.so: undefined reference to
`rint'
/usr/local/lib/libRmath.so: undefined reference to
`cos'
/usr/local/lib/libRmath.so: undefined reference to
`sin'
/usr/local/lib/libRmath.so: undefined reference to
`pow'
/usr/local/lib/libRmath.so: undefined reference to
`sinh'
/usr/local/lib/libRmath.so: undefined reference to
`log10'
/usr/local/lib/libRmath.so: undefined reference to
`exp'
/usr/local/lib/libRmath.so: undefined reference to
`tan'
/usr/local/lib/libRmath.so: undefined reference to
`log1p'
/usr/local/lib/libRmath.so: undefined reference to
`hypot'
collect2: ld returned 1 exit status
Brian Ripley
# 
First, please read the posting guide: it says C programming questions 
should go to R-devel so it seems you have not done so.

Second, you have not told us your OS nor what you did to run your code, so 
we have to guess. But sin etc are not 'R functions' but C mathematical 
functions, and the quess is that you failed to link against libm.  Most C 
compilers will do that for you automatically or do not even have a 
separate libm, so telling us your OS (as the posting guide does ask) was 
important.

Please seek local C programming help on how to do this on your OS.
On Wed, 10 Aug 2005, yyan liu wrote: