[ADOL-C] Building with OpenMP support

[Dominique Orban]

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

LIBS=-lgomp


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
directory
 #include "adolc_openmp.h"
                          ^
compilation terminated.


This time I have to configure with

CFLAGS="-I$PWD/ADOL-C/include/adolc" \
CXXFLAGS="-I$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
intervention?!

Thanks,

Dominique
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