Add a helper to remove a compile option from targets

everest-cmake-config-version.cmake

@@ -1,9 +1,9 @@
-set(PACKAGE_VERSION 0.5.1)
+set(PACKAGE_VERSION 0.6.0)
 
 if(PACKAGE_FIND_VERSION STREQUAL PACKAGE_VERSION)
     set(PACKAGE_VERSION_EXACT TRUE)
 elseif (PACKAGE_FIND_VERSION_MAJOR STREQUAL "0")
-    if (PACKAGE_FIND_VERSION_MINOR GREATER "5")
+    if (PACKAGE_FIND_VERSION_MINOR GREATER "6")
         set(PACKAGE_VERSION_UNSUITABLE TRUE)
     else ()
         set(PACKAGE_VERSION_COMPATIBLE TRUE)

everest-cmake-config.cmake

@@ -22,6 +22,7 @@ if (everest_cmake_FOUND)
 endif()
 
 include("${CMAKE_CURRENT_LIST_DIR}/edm.cmake")
+include("${CMAKE_CURRENT_LIST_DIR}/helpers.cmake")
 include("${CMAKE_CURRENT_LIST_DIR}/python-package-helpers.cmake")
 include("${CMAKE_CURRENT_LIST_DIR}/python-virtualenv.cmake")
 

helpers.cmake

@@ -0,0 +1,46 @@
+function(ev_remove_target_compile_option)
+    set(one_value_args
+        PREFIX # removes all compile options with this prefix
+        EXACT # removes an option only if it matches exactly
+    )
+
+    set(multi_value_args
+        TARGETS
+    )
+
+    cmake_parse_arguments(
+        "args"
+        ""
+        "${one_value_args}"
+        "${multi_value_args}"
+        ${ARGN}
+    )
+
+    foreach(target ${args_TARGETS})
+        set(COMPILE_OPTIONS_TO_REMOVE "")
+        get_target_property(TARGET_COMPILE_OPTIONS "${target}" COMPILE_OPTIONS)
+        # find applicable compile options for this target
+        foreach(compile_option ${TARGET_COMPILE_OPTIONS})
+            # collect compile options with a certain prefix
+            if(NOT "${args_PREFIX}" STREQUAL "")
+                string(FIND "${compile_option}" "${args_PREFIX}" POSITION)
+                if("${POSITION}" EQUAL "0")
+                    list(APPEND COMPILE_OPTIONS_TO_REMOVE "${compile_option}")
+                endif()
+            endif()
+            # collect compile options with an exact match
+            if(NOT "${args_EXACT}" STREQUAL "")
+                if("${args_EXACT}" STREQUAL "${compile_option}")
+                    message(STATUS "FOUND IT! ${compile_option} equals ${args_EXACT}")
+                    list(APPEND COMPILE_OPTIONS_TO_REMOVE "${compile_option}")
+                endif()
+            endif()
+        endforeach()
+
+        # remove the collected compile options from the target
+        foreach(compile_option ${COMPILE_OPTIONS_TO_REMOVE})
+            list(REMOVE_ITEM TARGET_COMPILE_OPTIONS "${compile_option}")
+        endforeach()
+        set_target_properties("${target}" PROPERTIES COMPILE_OPTIONS "${TARGET_COMPILE_OPTIONS}")
+    endforeach()
+endfunction()