NAG

Two different libs are available, both for static and dynamic linking

• nag_nag
• nag_essl

For best performance, we recommend that you should use the variant of the NAG Fortran Library which is based on the Engineering and Scientific Subroutine Library (ESSL) V4.4 i.e. libnag_essl.a or libnag_essl.so. However, if you use a version of the ESSL different from the version used in creating this implementation and you have problems when calling a NAG routine, we suggest that you use one of the self-contained libraries libnag_nag.a or libnag_nag.so.

In order to link the NAG library to your code, you have to load the library in your environment:

 module load nag

Then you have to link the library to your Fortran or C code:

 mpxlf_r -q64 -o myexe.x myobj.o -L${NAG_LIB} -lnag_nag          myexe.f
 mpxlf_r -q64 -o myexe.x myobj.o -L${NAG_LIB} -lnag_essl -lessl myexe.f
 mpxlc_r -q64 -o myexe.x myobj.o -L${NAG_LIB} -lnag_essl -lessl myexe.c