Changed variable type. Added 64 bit compilation flag to Makefile

Author: manodeep

.gitignore

@@ -21,6 +21,7 @@
 *.dylib
 
 # Executables
+2LPTic
 *.exe
 *.out
 *.app

Makefile

@@ -31,7 +31,7 @@ OPT += -DUSE_CAMB                     # Allow input tabulated transfer function
 
 OPTIONS :=  $(OPT)
 CC       :=  mpicc
-OPTIMIZE :=  -O3 -march=native
+OPTIMIZE :=  -O3 -march=native -m64
 
 # Set for TACC Stampede.
 GSL_INCL :=  -isystem$(TACC_GSL_INC) -isystem$(TACC_GSL_INC)/gsl

main.c

@@ -97,7 +97,7 @@ void displacement_fields(void)
   double dis, dis2, maxdisp, max_disp_glob;
   unsigned int *seedtable;
 
-  unsigned int bytes;
+  size_t bytes;
   double nmesh3;
   int coord;
   fftw_complex *(cdisp[3]), *(cdisp2[3]) ; /* ZA and 2nd order displacements */