Armadillo : Can not find clapack.h - c++

Question

I am trying to install Armadillo link.
However, make command complains about "clapack.h" which does exists at location /usr/include/atlas/clapack.h. Some help would be appreciated.
Note, I can run it if I copy that file to /usr/include/ and then make:
$ sudo cp /usr/include/atlas/clapack.h /usr/include/
$ make
But, I am not comfortable in making copies of same file in multiple location. Could it be dangerous?
This is what I did so far:
1) I downloaded and tar the armadillo library. After that, I changed following lines in CMakeLists.txt (I have Lapack, Blas, Atlas):
set(ARMA_USE_LAPACK true)
set(ARMA_USE_BLAS true)
set(ARMA_USE_ATLAS true)
set(ARMA_USE_HDF5_ALT false)
set(ARMA_USE_ARPACK false)
set(ARMA_USE_CXX11_RNG false)
set(ARMA_USE_WRAPPER true )
then "$cmake ." runs successfully and finds Lapack, Blas and Atlas.
However, when I run "make" it gives following error (line 26 marked in the code include_atlas.hpp):
$ make
Scanning dependencies of target armadillo
[100%] Building CXX object CMakeFiles/armadillo.dir/src/wrapper.cpp.o
In file included from /home/dkumar/Downloads/armadillo-4.600.3/src/wrapper.cpp:10:0:
/home/dkumar/Downloads/armadillo-4.600.3/tmp/include/armadillo_bits/include_atlas.hpp:26:47: fatal error: /usr/include/clapack.h: No such file or directory
#include ARMA_INCFILE_WRAP(ARMA_CLAPACK)
^
compilation terminated.
make[2]: *** [CMakeFiles/armadillo.dir/src/wrapper.cpp.o] Error 1
make[1]: *** [CMakeFiles/armadillo.dir/all] Error 2
make: *** [all] Error 2
When I look at include_atlas.hpp, it seems that ARMA_USE_ATLAS is still set false:
// Copyright (C) 2008-2011 Conrad Sanderson
// Copyright (C) 2008-2011 NICTA (www.nicta.com.au)
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.
#if defined(ARMA_USE_ATLAS)
#if !defined(ARMA_ATLAS_INCLUDE_DIR)
extern "C"
{
#include <cblas.h>
#include <clapack.h>
}
#else
#define ARMA_STR1(x) x
#define ARMA_STR2(x) ARMA_STR1(x)
#define ARMA_CBLAS ARMA_STR2(ARMA_ATLAS_INCLUDE_DIR)ARMA_STR2(cblas.h)
#define ARMA_CLAPACK ARMA_STR2(ARMA_ATLAS_INCLUDE_DIR)ARMA_STR2(clapack.h)
extern "C"
{
#include ARMA_INCFILE_WRAP(ARMA_CBLAS)
#include ARMA_INCFILE_WRAP(ARMA_CLAPACK) // This is line no 26
}
#undef ARMA_STR1
#undef ARMA_STR2
#undef ARMA_CBLAS
#undef ARMA_CLAPACK
#endif
#endif
If I replace ARMA_CLAPACK with "/usr/include/atlas/clapack.h", it still complains:
$ make
Scanning dependencies of target armadillo
[100%] Building CXX object CMakeFiles/armadillo.dir/src/wrapper.cpp.o
In file included from /home/dkumar/Downloads/armadillo-4.600.3/src/wrapper.cpp:10:0:
/home/dkumar/Downloads/armadillo-4.600.3/tmp/include/armadillo_bits/include_atlas.hpp:26:89: fatal error: "/usr/include/atlas/clapack.h": No such file or directory
#include ARMA_INCFILE_WRAP("/usr/include/atlas/clapack.h") // This is line no 26
^
compilation terminated.
make[2]: *** [CMakeFiles/armadillo.dir/src/wrapper.cpp.o] Error 1
make[1]: *** [CMakeFiles/armadillo.dir/all] Error 2
make: *** [all] Error 2

Answer 1

I was having same problem while running make after cmake . when I check the cmake output it was pointing to wrong atlas directory i.e. it was pointing to ATLAS_INCLUDE_DIR = /usr/include/ where as it should have been pointing to ATLAS_INCLUDE_DIR = /usr/include/atlas.
-- Found ATLAS: /usr/lib/libatlas.so
-- Found BLAS: /usr/lib/libblas.so
-- Found LAPACK: /usr/lib/liblapack.so
-- MKL_FOUND = NO
-- ACMLMP_FOUND = NO
-- ACML_FOUND = NO
-- OpenBLAS_FOUND = NO
-- ATLAS_FOUND = YES
-- BLAS_FOUND = YES
-- LAPACK_FOUND = YES
-- ATLAS_INCLUDE_DIR = /usr/include/
-- ARPACK_FOUND = NO
--
-- *** Armadillo wrapper library will use the following libraries:
-- *** ARMA_LIBS = /usr/lib/libatlas.so;/usr/lib/libblas.so;/usr/lib/liblapack.so
I correct this by adding correct path in CmakeCache.txt file. After that it make and make install run fine.
But I am having this error while running after compiling example using
g++ -O2 -o example1 example1.cpp -larmadillo
the error is
./example1: error while loading shared libraries: libarmadillo.so.4: cannot open shared object file: No such file or directory
Note: The above error can be solved by creating a symbolic link of libarmadillo.so and libarmadillo.so.4 in /usr/lib directory.