Merge pull request #78 from etcwilde/ewilde/override-modulemap-in-build-dir

CMake: modulemap file override as build interface

Author: etcwilde

icuSources/CMakeLists.txt

@@ -19,7 +19,7 @@ target_include_directories(_FoundationICU
         include/)
 
 target_compile_options(_FoundationICU INTERFACE
-  "$<$<COMPILE_LANGUAGE:Swift>:SHELL:-Xcc -fmodule-map-file=${CMAKE_CURRENT_SOURCE_DIR}/include/_foundation_unicode/module.modulemap>")
+  "$<BUILD_INTERFACE:$<$<COMPILE_LANGUAGE:Swift>:SHELL:-Xcc -fmodule-map-file=${CMAKE_CURRENT_SOURCE_DIR}/include/_foundation_unicode/module.modulemap>>")
 
 add_subdirectory(common)
 add_subdirectory(i18n)