Uniformize style of CMake modules

cmake/Modules/FindOPENBLAS.cmake

@@ -0,0 +1,44 @@
+# Copyright (C) 2011-2018 (see AUTHORS file for a list of contributors)
+#
+# This file is part of GNSS-SDR.
+#
+# GNSS-SDR is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# GNSS-SDR is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with GNSS-SDR. If not, see <https://www.gnu.org/licenses/>.
+
+# - Try to find OpenBLAS library (not headers!)
+#
+# The following environment variable is optionally searched
+# OPENBLAS_HOME: Base directory where all OpenBlas components are found
+
+set(OPEN_BLAS_SEARCH_PATHS  /lib/
+                            /lib64/
+                            /usr/lib
+                            /usr/lib64
+                            /usr/local/lib
+                            /usr/local/lib64
+                            /opt/OpenBLAS/lib
+                            /opt/local/lib
+                            /usr/lib/openblas-base
+                            $ENV{OPENBLAS_HOME}/lib
+                            )
+
+find_library(OPENBLAS NAMES openblas PATHS ${OPEN_BLAS_SEARCH_PATHS})
+
+if(OPENBLAS)
+    set(OPENBLAS_FOUND ON)
+    message(STATUS "Found OpenBLAS")
+endif()
+
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(OPENBLAS DEFAULT_MSG OPENBLAS)
+mark_as_advanced(OPENBLAS)