[SOLVED] collect2: error: ld returned 1 exit status

shogun1234 · 08-28-2015, 07:35 AM

A newbie programming question.

When compiling a program with command

Code:

gcc -o test test.c

gcc complains

Code:

/tmp/ccYeJqKe.o: In function `main':
test.c:(.text+0x12): undefined reference to `npth_init'
collect2: error: ld returned 1 exit status

The source is attached

Code:

#include <npth.h>

int main(int argc, char** argv) 
{

  npth_init ();
  
  return 0;
}

I am sure the library is installed. Package manager display

Code:

sudo dpkg -S npth.h
libnpth0-dev: /usr/include/npth.h

Adding -I/usr/include doesn't help.

My environment: gcc (Debian 4.9.2-10) 4.9.2, kernel: 4.0.0-2-rt-686-pae

How should I fix this error?

Thanks

shogun1234 · 08-28-2015, 08:14 AM

The problem is solved by adding -lnpth.

Code:

gcc -o test -lnpth test.c

So the above command fixes the problem.
Thanks

Quote:

Originally Posted by shogun1234

A newbie programming question.

When compiling a program with command

Code:

gcc -o test test.c

gcc complains

Code:

/tmp/ccYeJqKe.o: In function `main':
test.c:(.text+0x12): undefined reference to `npth_init'
collect2: error: ld returned 1 exit status

The source is attached

Code:

#include <npth.h>

int main(int argc, char** argv) 
{

  npth_init ();
  
  return 0;
}

I am sure the library is installed. Package manager display
[code]
sudo dpkg -S npth.h
libnpth0-dev: /usr/include/npth.h
[code]

Adding -I/usr/include doesn't help.

My environment: gcc (Debian 4.9.2-10) 4.9.2, kernel: 4.0.0-2-rt-686-pae

How should I fix this error?

Thanks

NevemTeve · 08-28-2015, 12:59 PM

Note: always be precise when describe the problem: you had a linkage problem, not a compilation problem.

When you see the words: collect2 and/or ld then it is a linkage problem,

shogun1234 · 08-29-2015, 09:56 PM

Quote:

Originally Posted by NevemTeve

Note: always be precise when describe the problem: you had a linkage problem, not a compilation problem.

When you see the words: collect2 and/or ld then it is a linkage problem,

Thanks. I've updated so the question would be more precise.

johnbstroud · 05-30-2019, 01:09 PM

gcc file.c -o file -lm
best of luck !