Add 'FarmhashSource' as an external module (#177)

This commit adds 'FarmhashSource' (which is necessary to build
tensorflow lite) as an external module that nncc_find_package can load.

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

diff --git a/CMakeLists.txt b/CMakeLists.txt
index d202e35..3addb55 100644 (file)
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -14,6 +14,7 @@ endmacro(nncc_find_package)
 ### Configuration
 ###
 option(DOWNLOAD_EIGEN "Download Eigen source" OFF)
+option(DOWNLOAD_FARMHASH "Download farmhash source" OFF)
 option(DOWNLOAD_FLATBUFFERS "Download FlatBuffers source" OFF)
 option(DOWNLOAD_TENSORFLOW "Download TensorFlow source" OFF)
 

diff --git a/cmake/packages/FarmhashSourceConfig.cmake b/cmake/packages/FarmhashSourceConfig.cmake
new file mode 100644 (file)
index 0000000..4f5345b
--- /dev/null
+++ b/cmake/packages/FarmhashSourceConfig.cmake
@@ -0,0 +1,19 @@
+function(_FarmhashSource_import)
+  if(NOT DOWNLOAD_FARMHASH)
+    set(FarmhashSource_FOUND FALSE PARENT_SCOPE)
+    return()
+  endif(NOT DOWNLOAD_FARMHASH)
+
+  nncc_find_package(ExternalSourceTools REQUIRED)
+  nncc_find_package(OptionTools REQUIRED)
+
+  # NOTE TensorFlow 1.7 downloads farmhash from the following URL
+  envoption(FARMHASH_URL https://github.com/google/farmhash/archive/816a4ae622e964763ca0862d9dbd19324a1eaf45.tar.gz)
+
+  ExternalSource_Download(FARMHASH ${FARMHASH_URL})
+
+  set(FarmhashSource_DIR ${FARMHASH_SOURCE_DIR} PARENT_SCOPE)
+  set(FarmhashSource_FOUND TRUE PARENT_SCOPE)
+endfunction(_FarmhashSource_import)
+
+_FarmhashSource_import()