error in compiling with gfortran

[Fateme Fehresti]

Dear all
I use 2013 oct version of CAMB
I wanted to compile my program with gfortran compiler, but it makes error.
its error is:
unrecognized option'-cxxlib'

could you please help me to solve this problem?
Best regards

[Jason Dossett]

Hi Feteme,

You should comment out that first set of lines for compiling with ifort and uncomment the lines for compiling with gfortran as follows

Code: Select all

#Intel , -openmp toggles mutli-processor:
#note version 10.0 gives wrong result for lensed when compiled with -openmp [fixed in 10.1]
#F90C     = ifort
#FFLAGS = -openmp -O2 -W0 -WB -fpp2 -vec_report0
## This is flag is passed to the Fortran compiler allowing it to link C++ if required (not usually):
#F90CRLINK = -cxxlib
#ifneq ($(FISHER),)
#FFLAGS += -mkl
#endif

#Gfortran compiler:
#The options here work in v4.5, delete from RHS in earlier versions (15% slower)
#if pre v4.3 add -D__GFORTRAN__
#With v4.6+ try -Ofast -march=native -fopenmp
#On my machine v4.5 is about 20% slower than ifort
F90C     = gfortran
FFLAGS =  -O3 -fopenmp -ffast-math -march=native -funroll-loops

Also a quick note, the current version of camb does not seem to compile below gcc 4.4. Version 4.3 does not appear to have the built in bessel functions needed when compiling lensing.f90.

[Fateme Fehresti]

Hi Jason
Thanks for your help
I tried ifort command but because my ifort version was 2011 it didnt work. I know that I should use ifort 2013 but I dont have license for this version.

anyway thanks alot

[Antony Lewis]

camb should work with old ifort versions, only CosmoMC needs ifort 13+.