Add QUIET to find_package with embree, etc.

README.md

@@ -127,7 +127,7 @@ and tools.
   - `filamat`:             Material generation library
   - `filameshio`:          Tiny filamesh parsing library (see also `tools/filamesh`)
   - `geometry`:            Mesh-related utilities
-  - `gltfio`:              Loader for glTF 2.0
+  - `gltfio`:              Loader and optional pipeline for glTF 2.0
   - `ibl`:                 IBL generation tools
   - `image`:               Image filtering and simple transforms
   - `imageio`:             Image file reading / writing, only intended for internal use
@@ -170,6 +170,11 @@ To build the Java based components of the project you can optionally install (re
 Additional dependencies may be required for your operating system. Please refer to the appropriate
 section below.
 
+Building the light baking pipeline is optional and requires the following packages:
+
+- embree 3.0+
+- libtbb-dev
+
 To build Filament for Android you must also install the following:
 
 - Android Studio 3.3

build/linux/ci-common.sh

@@ -80,6 +80,15 @@ if [[ "$KOKORO_BUILD_ID" ]]; then
     (cd projects/libcxx && sudo make -j install)
     (cd projects/libcxxabi && sudo make -j install)
 
+    # install embree 3+ to test buildability of the light baking pipeline
+    sudo apt-get install -y alien libtbb-dev
+    curl -LO https://github.com/embree/embree/releases/download/v3.5.2/embree-3.5.2.x86_64.rpm.tar.gz
+    tar xzf embree-3.5.2.x86_64.rpm.tar.gz
+    sudo alien embree3-devel-3.5.2-1.noarch.rpm
+    sudo alien embree3-lib-3.5.2-1.x86_64.rpm
+    sudo dpkg -i embree3-lib_3.5.2-2_amd64.deb
+    sudo dpkg -i embree3-devel_3.5.2-2_all.deb
+
     cd ../..
 
     export LD_LIBRARY_PATH=/usr/local/lib:$LD_LIBRARY_PATH

libs/gltfio/CMakeLists.txt

@@ -112,10 +112,12 @@ add_library(gltfio_resources ${DUMMY_SRC} ${RESGEN_SOURCE})
 # This is an optional dependency and can be installed with homebrew, apt-get, etc.
 # ==================================================================================================
 
-find_package(embree 3.0)
+find_package(embree 3.0 QUIET PATHS /usr/lib64/cmake)
 if (embree_FOUND)
     message("Found embree in ${embree_DIR}")
     add_definitions(-DFILAMENT_HAS_EMBREE)
+else()
+    message("Embree not found, pipeline features are disabled.")
 endif()
 
 # ==================================================================================================