Test and Install the Machine-Dependent Routines.

There are five machine-dependent functions in the test and timing package, at least three of which must be installed. They are

LSAME 		  LOGICAL 		 Test if two characters are the same regardless of case 


SLAMCH 		  REAL 		 Determine machine-dependent parameters 


DLAMCH 		  DOUBLE PRECISION 		 Determine machine-dependent parameters 


SECOND 		  REAL 		 Return time in seconds from a fixed starting time 


DSECND 		  DOUBLE PRECISION 		 Return time in seconds from a fixed starting time


ILAENV 		  INTEGER 		 Checks that NaN and infinity arithmetic are IEEE-754 compliant

If you are working only in single precision, you do not need to install DLAMCH and DSECND, and if you are working only in double precision, you do not need to install SLAMCH and SECOND. These five subroutines and their test programs are provided in the files LSAMEF and TLSAMEF, SLAMCHF and TSLAMCHF, etc.