new test: cc_lapack

- extended math_libs.cmake for C headers detection
- static_linking tests included
- rearranged math-libs order for better libraries detection
- no int64 for cc_lapack
- added include/ directory to %path% to detect clapack.h in appveyor
- simplified C-code, intendations kept
- travis-ci kept simple, but needs liblapack-dev and libatlas-base-dev
- libatlas-dev can not be installed due to repeating xerba objects in *.a lib
  files

.travis.yml

@@ -11,7 +11,8 @@ addons:
       - binutils-gold
       - libc6-dev
       - libpthread-stubs0-dev
-        # Math libraries
+        # Math libraries : SYSTEM_NATIVE-static/dynamic and ATLAS-dynamic only
+        # do not install libatlas-dev due to conflicts of repeating xerbla in *.a lib files
       - libblas-dev
       - liblapack-dev
       - libatlas-base-dev

test/cc_clapack/cmake/autocmake.cfg

@@ -0,0 +1,17 @@
+[project]
+name: example
+
+[cc]
+source: ../../../modules/cc.cmake
+
+[static]
+source: ../../../modules/static_linking.cmake
+
+[math_libs]
+source: ../../../modules/math_libs.cmake
+
+[default_build_paths]
+source: ../../../modules/default_build_paths.cmake
+
+[src]
+source: ../../../modules/src.cmake

test/cc_clapack/src/CMakeLists.txt

@@ -0,0 +1,13 @@
+if(LAPACK_FOUND)
+    if(${CMAKE_SYSTEM_NAME} MATCHES "Windows")
+    #windows needs to find <lapacke.h> of openblas 
+        include_directories($ENV{PATH})
+    else()
+    #ftravis-ci needs find <clapack.h> of ATLAS
+        include_directories(/usr/include/atlas)
+    endif()
+    add_executable(example example.c)
+    target_link_libraries(example ${MATH_LIBS})
+else()
+    message(FATAL_ERROR "LAPACK library not found for the test cc_clapack!")
+endif()

test/cc_clapack/src/example.c

@@ -0,0 +1,52 @@
+#include <stdio.h>
+#include <stdlib.h>
+#if defined HAVE_MKL_LAPACK 
+#include <mkl_lapacke.h>
+#include <mkl_cblas.h>
+#pragma message "Using Intel MKL c-lapack interface, <mkl_lapacke.h>."
+#elif defined HAVE_OPENBLAS_LAPACK
+#include <lapacke.h>
+#include <cblas.h>
+#pragma message "Using OpenBLAS C-lapack interface, <lapacke.h>."
+#else
+#include <clapack.h>
+#include <cblas.h>
+#pragma message "Using ATLAS/SYSTEM_NATIVE C lapack interface, <clapack.h>."
+#endif
+
+void main(void)
+{
+    int i,j,n=3;
+    double a[n*n],b[n],small = 1.0e-12;
+    int ierr,ipiv[n];
+    int roots_ok=0;
+
+    a[0] =  2.00;
+    a[1] =  1.00;
+    a[2] =  3.00;
+    a[3] =  2.00;
+    a[4] =  6.00;
+    a[5] =  8.00;
+    a[6] =  6.00;
+    a[7] =  8.00;
+    a[8] = 18.00;
+
+    b[0] = 1.00;
+    b[1] = 3.00;
+    b[2] = 5.00;
+
+/* MKL, OpenBLAS   */
+#if defined HAVE_MKL_LAPACK  || defined HAVE_OPENBLAS_LAPACK
+    ierr = LAPACKE_dgesv(CblasColMajor, n, 1, a,  n, ipiv, b, n);
+#else /* ATLAS, SYSTEM_NATIVE */
+    ierr = clapack_dgesv(CblasColMajor, n, 1, a,  n, ipiv, b, n);
+#endif
+    if (ierr != 0) { fprintf(stderr, "\nC dgesv failure with error %d\n", ierr);}
+
+    if (abs(b[0] + 0.500) <= small && 
+        abs(b[1] - 0.250) <= small && 
+        abs(b[2] - 0.250) <= small) roots_ok=1;
+
+    if ( roots_ok == 1 ) {fprintf(stdout,"PASSED"); }
+    else {fprintf(stderr,"\nC LAPACK dgesv failure!");}
+}

test/test.py

@@ -205,6 +205,14 @@ def test_fc_lapack():
 def test_fc_lapack_static():
     configure_build_and_exe('fc_lapack', 'python setup.py --fc=gfortran --static --cmake-options="-DMATH_LIB_SEARCH_ORDER=\'OPENBLAS;ATLAS;MKL;SYSTEM_NATIVE\'"')
 
+
+def test_cc_clapack():
+    configure_build_and_exe('cc_clapack', 'python setup.py --cc=gcc --cmake-options="-DMATH_LIB_SEARCH_ORDER=\'OPENBLAS;ATLAS;MKL;SYSTEM_NATIVE\'"')
+
+
+def test_cc_clapack_static():
+    configure_build_and_exe('cc_clapack', 'python setup.py --cc=gcc --static --cmake-options="-DMATH_LIB_SEARCH_ORDER=\'OPENBLAS;ATLAS;MKL;SYSTEM_NATIVE\'"')
+
 # ------------------------------------------------------------------------------