[ADOL-C] Building with OpenMP support

Dominique Orban dominique.orban at gmail.com
Sat May 10 16:03:52 EDT 2014

ADOL-C 2.3.0 doesn't build with OpenMP support on OSX with gcc
(--with-openmp-flag=-fopenmp). It fails with

Undefined symbols for architecture x86_64:
  "_omp_get_num_threads", referenced from:
      endParallel()     in tape_handling.o
      beginParallel()     in tape_handling.o
  "_omp_get_thread_num", referenced from:
      adouble::adouble() in adouble.o
      adouble::adouble() in adouble.o
      adouble::adouble(double) in adouble.o
      adouble::adouble(double) in adouble.o
      adouble::adouble(adouble const&) in adouble.o
      adouble::adouble(adouble const&) in adouble.o
      adouble::adouble(adub const&) in adouble.o
ld: symbol(s) not found for architecture x86_64

The reason is that libgomp was never included. Configuring with


has ADOL-C build successfully and all tests pass.

In ADOLC-2.5.0, building fails with

tape_handling.cpp:1022:26: fatal error: adolc_openmp.h: No such file or
 #include "adolc_openmp.h"
compilation terminated.

This time I have to configure with

CFLAGS="-I$PWD/ADOL-C/include/adolc" \

(it doesn't seem necessary to specify LIBS=-lgomp any more).

But I suppose configure should do all that by itself, without user


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