Checking if your kit is complete... Looks good Note (probably harmless): No library found for -lgsl Note (probably harmless): No library found for -lgslcblas Writing Makefile for Math::GSL cp GSL.pm blib/lib/Math/GSL.pm /home/cpanrun/pa-risc1.1/build/5.8.2/bin/perl /home/cpanrun/pa-risc1.1/build/5.8.2/lib/5.8.2/ExtUtils/xsubpp -typemap /home/cpanrun/pa-risc1.1/build/5.8.2/lib/5.8.2/ExtUtils/typemap GSL.xs > GSL.xsc && mv GSL.xsc GSL.c cc -c -D_POSIX_C_SOURCE=199506L -D_REENTRANT -Ae -D_HPUX_SOURCE -Wl,+vnocompatwarnings -DNO_HASH_SEED -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -fast +Onolimit +Opromote_indirect_calls +DAportable +DS2.0 -DVERSION=\"0.01\" -DXS_VERSION=\"0.01\" +Z "-I/home/cpanrun/pa-risc1.1/build/5.8.2/lib/5.8.2/PA-RISC1.1-thread-multi/CORE" GSL.c cpp: "GSL.xs", line 4: error 4036: Can't open include file 'gsl/gsl_errno.h'. cpp: "GSL.xs", line 5: error 4036: Can't open include file 'gsl/gsl_poly.h'. make: *** [GSL.o] Error 1