make examples and tests proper cmake projects

this will let us build examples and tests independently of occa.

Author: thilinarmtb

examples/CMakeLists.txt

@@ -1,3 +1,14 @@
+cmake_minimum_required (VERSION 3.21 FATAL_ERROR)
+project(OCCAExamples
+  VERSION 2.0.0
+  DESCRIPTION  "OCCA Examples"
+  HOMEPAGE_URL "https://github.com/libocca/occa"
+  LANGUAGES CXX)
+
+if (NOT TARGET OCCA::libocca)
+  find_package(OCCA REQUIRED)
+endif()
+
 macro(add_test_with_mode exe mode device)
   add_test(NAME ${exe}-${mode} COMMAND ./${exe} --verbose --device "${device}")
   set_property(TEST ${exe}-${mode} APPEND PROPERTY ENVIRONMENT OCCA_CACHE_DIR=${OCCA_BUILD_DIR}/occa)
@@ -32,7 +43,7 @@ endmacro()
 
 macro(compile_example target file mode)
   add_executable(${target} ${file})
-  target_link_libraries(${target} libocca)
+  target_link_libraries(${target} OCCA::libocca)
   target_include_directories(${target} PRIVATE $<BUILD_INTERFACE:${OCCA_SOURCE_DIR}/src>)
 
   file(RELATIVE_PATH install_dir ${CMAKE_SOURCE_DIR} ${CMAKE_CURRENT_LIST_DIR})

tests/CMakeLists.txt

@@ -1,3 +1,14 @@
+cmake_minimum_required (VERSION 3.21 FATAL_ERROR)
+project(OCCATests
+  VERSION 2.0.0
+  DESCRIPTION  "OCCA Tests"
+  HOMEPAGE_URL "https://github.com/libocca/occa"
+  LANGUAGES CXX)
+
+if (NOT TARGET OCCA::libocca)
+  find_package(OCCA REQUIRED)
+endif()
+
 function(add_occa_test test_source)
   # Metadata
   get_filename_component(source_directory ${test_source} DIRECTORY)
@@ -17,7 +28,7 @@ function(add_occa_test test_source)
     RUNTIME_OUTPUT_DIRECTORY ${test_directory})
 
   # Build config
-  target_link_libraries(${cmake_test_target} libocca ${CMAKE_THREAD_LIBS_INIT} ${CMAKE_DL_LIBS})
+  target_link_libraries(${cmake_test_target} OCCA::libocca ${CMAKE_THREAD_LIBS_INIT} ${CMAKE_DL_LIBS})
   target_include_directories(${cmake_test_target} PRIVATE
     $<BUILD_INTERFACE:${OCCA_SOURCE_DIR}/src>)
 
@@ -50,7 +61,7 @@ if (OCCA_ENABLE_FORTRAN)
     EXCLUDE REGEX "src/fortran/typedefs_helper.cpp")
 
   add_library(libtypedefs_helper SHARED "src/fortran/typedefs_helper.cpp")
-  target_link_libraries(libtypedefs_helper libocca)
+  target_link_libraries(libtypedefs_helper OCCA::libocca)
 else()
   list(FILTER occa_tests
     EXCLUDE REGEX "src/fortran")