How to fix 'sincos@@GLIBC_2.2.5' undefined reference for fftw3 library

Asked Jan 13 '20 at 23:34

Active Jan 13 '20 at 23:55

Viewed 2,827 times

I have been trying to install and execute a c-program using fftw3 library on Ubuntu machine but getting this error so many times.

How to fix the error? Help is much appreciated.

latest source code was downloaded: http://www.fftw.org/download.html

Install commands:

  sudo -H ./configure --enable-float --enable-sse --enable-threads
  sudo -H make
  sudo -H make install

Trying to compile:

gcc -Wall -O3 -o jediconvolve jediconvolve.c -L /usr/local/lib -lm -lcfitsio -lfftw3f

Errors:

bhishan@jedisim_sources:gcc -Wall -O3 -o jediconvolve jediconvolve.c -L /usr/local/lib -lm -lcfitsio -lfftw3f
/usr/bin/ld: /usr/local/lib/libfftw3f.a(trig.o): undefined reference to symbol 'sincos@@GLIBC_2.2.5'
/lib/x86_64-linux-gnu/libm.so.6: error adding symbols: DSO missing from command line
collect2: error: ld returned 1 exit status

file jediconvolve.c to test

https://pastebin.com/fHKwejj7

edited Jan 13 '20 at 23:55

asked Jan 13 '20 at 23:34

BhishanPoudel

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add `-ldl` after `-lm` to gcc – EsmaeelE Jan 14 '20 at 00:14
add `$ ldd --version` output to show actual linker version. – EsmaeelE Jan 14 '20 at 00:16
3

Try moving `-lm` after `-lfftw3f` – Shawn Jan 14 '20 at 02:15
1

This post https://stackoverflow.com/questions/11893996/why-does-the-order-of-l-option-in-gcc-matter in SO explained why the order of `-l` option in GCC matters. – Yingyu YOU Jan 14 '20 at 02:59
Thanks @Shawn, Somehow it worked. This is a most strange thing I have ever found. Thanks again. I always thought I can put l-libraries in any order, but I was wrong. – BhishanPoudel Jan 14 '20 at 05:43
@EsmaeelE `gcc -Wall -O3 -o jediconvolve jediconvolve.c -L /usr/local/lib -lm -ldl -lcfitsio -lfftw3f` gives the same error. – BhishanPoudel Jan 14 '20 at 05:47
@EsmaeelE `$ldd --version` gives `--version: command not found` There is no binary called ldd in my computer. – BhishanPoudel Jan 14 '20 at 05:49

How to fix 'sincos@@GLIBC_2.2.5' undefined reference for fftw3 library

file jediconvolve.c to test

0 Answers0