factored out dependency parsing to a macro

CMakeLists.txt

@@ -55,7 +55,7 @@ list(APPEND CMAKE_MODULE_PATH
 )
 include("configure_boost")
 include("configure_ccache")
-
+include("configure_dependencies")
 
 ##############################################################
 # CCache
@@ -68,26 +68,8 @@ configure_ccache()
 # Dependency Handling
 ##############################################################
 
-# We installed the dependencies into the subdirectories under the install prefix.
-# Hence must append them to the single cmake_prefix_path.
-message("Configure dependencies of Loki:")
-message(STATUS "CMAKE_PREFIX_PATH: ${CMAKE_PREFIX_PATH}")
-list(LENGTH CMAKE_PREFIX_PATH PREFIX_PATH_COUNT)
-if(PREFIX_PATH_COUNT GREATER 1)
-    message(FATAL_ERROR "Only one prefix path is allowed. Found multiple paths in CMAKE_PREFIX_PATH. Please add dependencies to the CMake Superbuild.")
-endif()
-
-list(APPEND MODIFIED_CMAKE_PREFIX_PATH
-    "${CMAKE_PREFIX_PATH}/benchmark"
-    "${CMAKE_PREFIX_PATH}/boost"
-    "${CMAKE_PREFIX_PATH}/googletest")
-message(${MODIFIED_CMAKE_PREFIX_PATH})
-set(CMAKE_PREFIX_PATH ${MODIFIED_CMAKE_PREFIX_PATH})
-message(STATUS "MODIFIED_CMAKE_PREFIX_PATH:")
-foreach(CMAKE_PREFIX_PATH_ARG ${CMAKE_PREFIX_PATH})
-    message(STATUS "-- ${CMAKE_PREFIX_PATH_ARG}")
-endforeach()
-# set(CMAKE_FIND_DEBUG_MODE ON)
+set(DEPENDENCY_NAMES_LIST benchmark boost googletest)
+configure_dependencies("${DEPENDENCY_NAMES_LIST}")
 
 # Boost
 # Find Boost headers only according to https://cmake.org/cmake/help/latest/module/FindBoost.html

cmake/configure_dependencies.cmake

@@ -0,0 +1,31 @@
+macro(configure_dependencies list_of_dependencies)
+    separate_arguments(list_of_dependencies)
+    message("${list_of_dependencies}")
+    # We installed the dependencies into the subdirectories under the install prefix.
+    # Hence must append them to the single cmake_prefix_path.
+    message("Configure dependencies of Loki:")
+    message(STATUS "CMAKE_PREFIX_PATH: ${CMAKE_PREFIX_PATH}")
+    list(LENGTH CMAKE_PREFIX_PATH PREFIX_PATH_COUNT)
+    if(PREFIX_PATH_COUNT GREATER 1)
+        message(FATAL_ERROR "Only one prefix path is allowed. Found multiple paths in CMAKE_PREFIX_PATH. Please add dependencies to the CMake Superbuild.")
+    endif()
+
+    # Assuming there's only one path in CMAKE_PREFIX_PATH, get that path
+    list(GET CMAKE_PREFIX_PATH 0 SINGLE_CMAKE_PREFIX_PATH)
+
+    # Clear MODIFIED_CMAKE_PREFIX_PATH before appending
+    set(MODIFIED_CMAKE_PREFIX_PATH "")
+
+    # Iterate over list of names and append each to SINGLE_CMAKE_PREFIX_PATH
+    foreach(DEPENDENCY_NAME ${list_of_dependencies})
+        list(APPEND MODIFIED_CMAKE_PREFIX_PATH "${SINGLE_CMAKE_PREFIX_PATH}/${DEPENDENCY_NAME}")
+    endforeach()
+
+   #  message(${MODIFIED_CMAKE_PREFIX_PATH})
+    set(CMAKE_PREFIX_PATH ${MODIFIED_CMAKE_PREFIX_PATH})
+    message(STATUS "MODIFIED_CMAKE_PREFIX_PATH:")
+    foreach(CMAKE_PREFIX_PATH_ARG ${CMAKE_PREFIX_PATH})
+        message(STATUS "-- ${CMAKE_PREFIX_PATH_ARG}")
+    endforeach()
+    # set(CMAKE_FIND_DEBUG_MODE ON)
+endmacro()