added: a dedicated FindCBLAS.cmake rule

the built-in FindBLAS cannot handle CBLAS, and it has only worked by
incident on ubuntu since the libblas available there also includes
libcblas. needed to be portable to other distros

git-svn-id: http://svn.sintef.no/trondheim/IFEM/trunk@1875 e10b68d5-8a6e-419e-a041-bce267b0401d

cmake/Modules/FindCBLAS.cmake

@@ -0,0 +1,24 @@
+IF (CBLAS_LIBRARIES)
+  SET(CBLAS_FIND_QUIETLY TRUE)
+ENDIF (CBLAS_LIBRARIES)
+
+FIND_LIBRARY(CBLAS_LIBRARIES
+  NAMES cblas
+  PATHS $ENV{HOME}/lib
+        /usr/lib/atlas/)
+
+IF(NOT CBLAS_LIBRARIES)
+  FIND_PACKAGE(BLAS)
+  INCLUDE(CheckFunctionExists)
+  SET(CMAKE_REQUIRED_LIBRARIES ${BLAS_LIBRARIES})
+  CHECK_FUNCTION_EXISTS(cblas_dgemm CBLAS_OK)
+  IF (CBLAS_OK)
+    SET(CBLAS_LIBRARIES ${BLAS_LIBRARIES})
+  ENDIF(CBLAS_OK)
+ENDIF(NOT CBLAS_LIBRARIES)
+
+
+INCLUDE(FindPackageHandleStandardArgs)
+FIND_PACKAGE_HANDLE_STANDARD_ARGS(CBLAS DEFAULT_MSG
+                                  CBLAS_LIBRARIES)
+MARK_AS_ADVANCED(CBLAS_LIBRARIES)

cmake/Modules/FindIFEMDeps.cmake

@@ -14,6 +14,7 @@ IF(CMAKE_CXX_COMPILER MATCHES icpc)
 ELSE(CMAKE_CXX_COMPILER MATCHES icpc)
   SET(IFEM_CXX_FLAGS "${IFEM_CXX_FLAGS} -DUSE_CBLAS")
   SET(IFEM_BUILD_CXX_FLAGS "${IFEM_BUILD_CXX_FLAGS} -DUSE_CBLAS")
+  FIND_PACKAGE(CBLAS REQUIRED)
   FIND_PACKAGE(LAPACK REQUIRED)
 ENDIF(CMAKE_CXX_COMPILER MATCHES icpc)
 
@@ -31,7 +32,8 @@ SET(IFEM_DEPLIBS ${IFEM_DEPLIBS}
                  ${GoTrivariate_LIBRARIES}
                  ${GoTools_LIBRARIES}
                  ${ARPACK_LIBRARIES}
-                 ${LAPACK_LIBRARIES})
+                 ${LAPACK_LIBRARIES}
+                 ${CBLAS_LIBRARIES})
 
 SET(IFEM_DEPINCLUDES ${IFEM_DEPINCLUDES}
                      ${GoTools_INCLUDE_DIRS}