I'm working on some code that was given me. Due to consistantly getting errors in the fftw3 intel compile I'm now trying to get it to work in a Linux (Fedora) environment. It was originally written in Linux apparently.
Now I don't have a clue what to do with a makefile. I've never had to use one before and I don't get it.
My header of my main file, main.c is as follows:
A part of my main program is the following (as an example, I don't know what it does yet):
Now this compiled fine in Xcode but gave memory problems which I narrowed down to fftw3 which is apparently buggy and incomplete for Intel OS X. Putting all this into Eclipse in Linux gave me lots of size errors so I changed the section above to:
This cured the mismatch errors but now my compile is giving me errors such as "undefined reference to 'fftw_malloc'" for the first part of the above code and "undefined reference to 'fftw_plan_dft_c2r_3d'" for the last little section.
My makefile at the moment is as follows:
I'm pretty sure my problem is that I'm not linking the fftw3 library properly in the makefile. I made that makefile by finding snippets online and shoving them together, I really don't know how they work at all. To work with, I was given a main.c file to work with and the ran.h file it calls - there are also *no* comments throughout the entire sixteen pages of code, so this is driving me nuts. I just want to get it working as is, just one copy of it working would let me have a base to work out what everything does etc etc. Can anyone help!!
Now I don't have a clue what to do with a makefile. I've never had to use one before and I don't get it.
My header of my main file, main.c is as follows:
Code:
#include <stdio.h>
#include <math.h>
#include <stdlib.h>
#include <fftw3.h>
#include "ran.h">A part of my main program is the following (as an example, I don't know what it does yet):
Code:
uk=fftw_malloc(n*n*(n/2+1)*sizeof(fftw_complex));
vk=fftw_malloc(n*n*(n/2+1)*sizeof(fftw_complex));
wk=fftw_malloc(n*n*(n/2+1)*sizeof(fftw_complex));
uktmp=fftw_malloc(n*n*(n/2+1)*sizeof(fftw_complex));
vktmp=fftw_malloc(n*n*(n/2+1)*sizeof(fftw_complex));
wktmp=fftw_malloc(n*n*(n/2+1)*sizeof(fftw_complex));
omk=fftw_malloc(n*n*(n/2+1)*sizeof(fftw_complex));
nlnsuk=fftw_malloc(n*n*(n/2+1)*sizeof(fftw_complex));
nlnsvk=fftw_malloc(n*n*(n/2+1)*sizeof(fftw_complex));
nlnswk=fftw_malloc(n*n*(n/2+1)*sizeof(fftw_complex));
ek=fftw_malloc((nk+1)*sizeof(double));
epsk=fftw_malloc((nk+1)*sizeof(double));
lk=fftw_malloc((nk+1)*sizeof(double));
sk=fftw_malloc((nk+1)*sizeof(double));
tk=fftw_malloc((nk+1)*sizeof(double));
u=fftw_malloc(n*n*n*sizeof(double));
v=fftw_malloc(n*n*n*sizeof(double));
w=fftw_malloc(n*n*n*sizeof(double));
om=fftw_malloc(n*n*n*sizeof(double));
ak1=fftw_malloc(n*sizeof(double));
ak2=fftw_malloc(n*sizeof(double));
ak3=fftw_malloc((n/2+1)*sizeof(double));
ak1a=fftw_malloc(na*sizeof(double));
ak2a=fftw_malloc(na*sizeof(double));
ak3a=fftw_malloc((na/2+1)*sizeof(double));
p1=fftw_plan_dft_c2r_3d(n,n,n,uktmp,u,FFTW_ESTIMATE);
p2=fftw_plan_dft_c2r_3d(n,n,n,vktmp,v,FFTW_ESTIMATE);
p3=fftw_plan_dft_c2r_3d(n,n,n,wktmp,w,FFTW_ESTIMATE);Now this compiled fine in Xcode but gave memory problems which I narrowed down to fftw3 which is apparently buggy and incomplete for Intel OS X. Putting all this into Eclipse in Linux gave me lots of size errors so I changed the section above to:
Code:
uk=(fftw_complex *)fftw_malloc(n*n*(n/2+1)*sizeof(fftw_complex));
vk=(fftw_complex *)fftw_malloc(n*n*(n/2+1)*sizeof(fftw_complex));
wk=(fftw_complex *)fftw_malloc(n*n*(n/2+1)*sizeof(fftw_complex));
uktmp=(fftw_complex *)fftw_malloc(n*n*(n/2+1)*sizeof(fftw_complex));
vktmp=(fftw_complex *)fftw_malloc(n*n*(n/2+1)*sizeof(fftw_complex));
wktmp=(fftw_complex *)fftw_malloc(n*n*(n/2+1)*sizeof(fftw_complex));
omk=(fftw_complex *)fftw_malloc(n*n*(n/2+1)*sizeof(fftw_complex));
nlnsuk=(fftw_complex *)fftw_malloc(n*n*(n/2+1)*sizeof(fftw_complex));
nlnsvk=(fftw_complex *)fftw_malloc(n*n*(n/2+1)*sizeof(fftw_complex));
nlnswk=(fftw_complex *)fftw_malloc(n*n*(n/2+1)*sizeof(fftw_complex));
ek=(double *)fftw_malloc((nk+1)*sizeof(double));
epsk=(double *)fftw_malloc((nk+1)*sizeof(double));
lk=(double *)fftw_malloc((nk+1)*sizeof(double));
sk=(double *)fftw_malloc((nk+1)*sizeof(double));
tk=(double *)fftw_malloc((nk+1)*sizeof(double));
u=(double *)fftw_malloc(n*n*n*sizeof(double));
v=(double *)fftw_malloc(n*n*n*sizeof(double));
w=(double *)fftw_malloc(n*n*n*sizeof(double));
om=(double *)fftw_malloc(n*n*n*sizeof(double));
ak1=(double *)fftw_malloc(n*sizeof(double));
ak2=(double *)fftw_malloc(n*sizeof(double));
ak3=(double *)fftw_malloc((n/2+1)*sizeof(double));
ak1a=(double *)fftw_malloc(na*sizeof(double));
ak2a=(double *)fftw_malloc(na*sizeof(double));
ak3a=(double *)fftw_malloc((na/2+1)*sizeof(double));
p1=fftw_plan_dft_c2r_3d(n,n,n,uktmp,u,FFTW_ESTIMATE);
p2=fftw_plan_dft_c2r_3d(n,n,n,vktmp,v,FFTW_ESTIMATE);
p3=fftw_plan_dft_c2r_3d(n,n,n,wktmp,w,FFTW_ESTIMATE);This cured the mismatch errors but now my compile is giving me errors such as "undefined reference to 'fftw_malloc'" for the first part of the above code and "undefined reference to 'fftw_plan_dft_c2r_3d'" for the last little section.
My makefile at the moment is as follows:
Code:
makefile:
all: main
LIB = -L/usr/local/lib -fftw3 -llapack -lblas -lg2c -static
main : main.o
g++ -g -o main main.o
main.o : main.c
g++ -c -g main.c
clean :
-del main.oI'm pretty sure my problem is that I'm not linking the fftw3 library properly in the makefile. I made that makefile by finding snippets online and shoving them together, I really don't know how they work at all. To work with, I was given a main.c file to work with and the ran.h file it calls - there are also *no* comments throughout the entire sixteen pages of code, so this is driving me nuts. I just want to get it working as is, just one copy of it working would let me have a base to work out what everything does etc etc. Can anyone help!!