Update Strings.md (#175)

Author: carlynorama

Sources/EmbeddedSwift/Documentation.docc/UsingEmbeddedSwift/Strings.md

@@ -35,6 +35,33 @@ $ swiftc <inputs> -target armv6m-none-none-eabi -enable-experimental-feature Emb
 $ ld ... -o binary output.o $(dirname `which swiftc`)/../lib/swift/embedded/armv6m-none-none-eabi/libswiftUnicodeDataTables.a
 ```
 
+Alternatively in a CMake build try something like the below which will check a Swiftly based install.
+
+Update the `COMPILER_TARGET` variable to the architecture desired.
+
+```CMake
+set(COMPILER_TARGET "riscv32-none-none-eabi")
+
+find_program(SWIFTLY "swiftly")
+IF(SWIFTLY)
+  execute_process(COMMAND swiftly use --print-location OUTPUT_VARIABLE toolchain_path OUTPUT_STRIP_TRAILING_WHITESPACE)
+  cmake_path(SET additional_lib_path NORMALIZE "${toolchain_path}/usr/lib/swift/embedded/${COMPILER_TARGET}")
+ELSE()
+  get_filename_component(compiler_bin_dir ${CMAKE_Swift_COMPILER} DIRECTORY)
+  cmake_path(SET additional_lib_path NORMALIZE "${compiler_bin_dir}/../lib/swift/embedded/${COMPILER_TARGET}")
+ENDIF()
+
+target_link_directories(${COMPONENT_LIB} PUBLIC "${additional_lib_path}")
+target_link_libraries(${COMPONENT_LIB}
+    -Wl,--whole-archive
+    swiftUnicodeDataTables
+    -Wl,--no-whole-archive
+    )
+
+## decomment the below line to troubleshoot path issues if needed.
+# message(" ----------::: ${additional_lib_path} :::---------- ")
+```
+
 **Unicode data tables are required for (list not exhaustive):**
 
 - Comparing String objects for equality