Simon, I suspect that Cloud9 doesn't know which include/link flags to use. See this section [1] of the reference manual for details, but you can try:
% gcc -Wall -I/usr/include -c example.c % gcc -L/usr/lib example.o -lgsl -lgslcblas -lm Which will compile your code in example.c to an executable called a.out. Note, I used the installation prefix /usr, which you indicated in a previous message. Hope that helps, vale [1] https://www.gnu.org/software/gsl/manual/gsl-ref.html#Compiling-and-Linking -- vale cofer-shabica 401.267.8253 On Tue, May 24, 2016 at 12:39 PM, Simon Bart <[email protected]> wrote: > Cloud9 has a built-in tab for compiling and running code which I use for > convenience, but I've also been trying with g++ without success > On May 24, 2016 12:36 PM, "Vale Cofer-Shabica" < > [email protected]> wrote: > >> Hi Simon, >> While that should fine, you could also use Ubuntu's GSL package, >> libgsl-dev. How are you compiling and executing your program? And when >> does the error appear? >> >> -vale >> >> -- >> vale cofer-shabica >> 401.267.8253 >> >> On Tue, May 24, 2016 at 12:12 PM, Simon Bart <[email protected]> >> wrote: >> >>> I'm using Cloud9 which is fully implemented Ubuntu except cloud hosted >>> and I installed GSL in my /usr/include library using the ./configure, make >>> and make install commands >>> On May 24, 2016 11:47 AM, "Vale Cofer-Shabica" < >>> [email protected]> wrote: >>> >>>> Hi Simon, >>>> >>>> Could you give us some more info about you set-up (OS & how you >>>> installed GSL) and how you're compiling your program? I suspect that you >>>> may be missing a flag to link the GSL libraries, -lgsl. >>>> >>>> -vale >>>> >>>> -- >>>> vale cofer-shabica >>>> 401.267.8253 >>>> >>>> On Tue, May 24, 2016 at 8:33 AM, Simon Bart <[email protected]> >>>> wrote: >>>> >>>>> I've posted my issue in the subject box. I'm new to GSL. It was the >>>>> best >>>>> library I could find with the most math and science operations. I am >>>>> using >>>>> C++, but I've even tried with C and the same error occurs. Hope there's >>>>> some help here. >>>>> >>>>> Cheers, >>>>> Simon >>>>> >>>> >>>> >>
