* installing *source* package ‘hadron’ ...
** package ‘hadron’ successfully unpacked and MD5 sums checked
** using staged installation
checking for g++... g++
checking whether the C++ compiler works... yes
checking for C++ compiler default output file name... a.out
checking for suffix of executables... 
checking whether we are cross compiling... no
checking for suffix of object files... o
checking whether we are using the GNU C++ compiler... yes
checking whether g++ accepts -g... yes
checking for gcc... gcc
checking whether we are using the GNU C compiler... yes
checking whether gcc accepts -g... yes
checking for gcc option to accept ISO C89... none needed
checking for gsl_sf_airy_Ai_e in -lgsl... no
configure: error: Cannot find Gnu Scientific Library.
ERROR: configuration failed for package ‘hadron’
* removing ‘/Users/ripley/R/packages/tests-devel/hadron.Rcheck/hadron’