Checking if your kit is complete... Looks good Writing Makefile for Geo::ReadGRIB cp lib/Geo/Sample-GRIB/akw.HTSGW.grb blib/lib/Geo/Sample-GRIB/akw.HTSGW.grb cp lib/Geo/ReadGRIB.pm blib/lib/Geo/ReadGRIB.pm gcc -o blib/lib/Geo/wgrib.exe wgrib.c ld: Unsatisfied symbol "frexp" in file /var/tmp//ccOY6uhu.o 1 errors. collect2: ld returned 1 exit status make: *** [blib/lib/Geo/wgrib.exe] Error 1