add some packages

recipes/bzip2/all/test_package/CMakeLists.txt

@@ -0,0 +1,24 @@
+cmake_minimum_required(VERSION 3.1)
+project(test_package LANGUAGES C)
+
+find_package(BZip2 REQUIRED)
+
+add_executable(test_package test_package.c)
+target_link_libraries(test_package PRIVATE BZip2::BZip2)
+
+# Test whether variables from https://cmake.org/cmake/help/latest/module/FindBZip2.html are properly defined
+set(_custom_vars
+    BZIP2_FOUND
+    BZIP2_NEED_PREFIX
+    BZIP2_INCLUDE_DIRS
+    BZIP2_INCLUDE_DIR
+    BZIP2_LIBRARIES
+    BZIP2_VERSION_STRING
+)
+foreach(_custom_var ${_custom_vars})
+    if(DEFINED ${_custom_var})
+        message(STATUS "${_custom_var}: ${${_custom_var}}")
+    else()
+        message(FATAL_ERROR "${_custom_var} not defined")
+    endif()
+endforeach()