prefix=/usr
exec_prefix=/usr
libdir=/usr/lib64
includedir=/usr/include
GSL_CBLAS_LIB=-lgslcblas

Name: GSL
Description: GNU Scientific Library
Version: 2.1
Libs: -L/usr/lib64 -lgsl ${GSL_CBLAS_LIB} -lm -lm 
Cflags: -I/usr/include