Add 'Farmhash' as an external module (#183)

This commit adds 'Farmhash' as an external module which provides
'farmhash' library target.

Signed-off-by: Jonghyun Park <jh1302.park@samsung.com>

diff --git a/cmake/packages/FarmhashConfig.cmake b/cmake/packages/FarmhashConfig.cmake
new file mode 100644 (file)
index 0000000..7c88aac
--- /dev/null
+++ b/cmake/packages/FarmhashConfig.cmake
@@ -0,0 +1,17 @@
+function(_Farmhash_import)
+  nncc_find_package(FarmhashSource QUIET)
+
+  if(NOT FarmhashSource_FOUND)
+    set(Farmhash_FOUND FALSE PARENT_SCOPE)
+    return()
+  endif(NOT FarmhashSource_FOUND)
+
+  if(NOT TARGET farmhash)
+    add_library(farmhash "${FarmhashSource_DIR}/src/farmhash.cc")
+    target_include_directories(farmhash PUBLIC "${FarmhashSource_DIR}/src")
+  endif(NOT TARGET farmhash)
+
+  set(Farmhash_FOUND TRUE PARENT_SCOPE)
+endfunction(_Farmhash_import)
+
+_Farmhash_import()