cmake: refactor deps detection, specify all dependencies in the expor…

…ted caffe target

This is the first step towards "modern" IMPORTED-targets-only CMake
setup. The find_package modules still need to be rewritten and upstreamed in
form of config exports where possible.

CMakeLists.txt

@@ -54,8 +54,6 @@ if(USE_libstdcpp)
   message("-- Warning: forcing libstdc++ (controlled by USE_libstdcpp option in cmake)")
 endif()
 
-add_definitions(-DGTEST_USE_OWN_TR1_TUPLE)
-
 # ---[ Warnings
 caffe_warnings_disable(CMAKE_CXX_FLAGS -Wno-sign-compare -Wno-uninitialized)
 
@@ -64,8 +62,26 @@ configure_file(cmake/Templates/caffe_config.h.in "${PROJECT_BINARY_DIR}/caffe_co
 
 # ---[ Includes
 set(Caffe_INCLUDE_DIR ${PROJECT_SOURCE_DIR}/include)
-include_directories(${Caffe_INCLUDE_DIR} ${PROJECT_BINARY_DIR})
-include_directories(BEFORE src) # This is needed for gtest.
+set(Caffe_SRC_DIR ${PROJECT_SOURCE_DIR}/src)
+include_directories(${PROJECT_BINARY_DIR})
+
+# ---[ Includes & defines for CUDA
+
+# cuda_compile() does not have per-call dependencies or include pathes
+# (cuda_compile() has per-call flags, but we set them here too for clarity)
+#
+# list(REMOVE_ITEM ...) invocations remove PRIVATE and PUBLIC keywords from collected definitions and include pathes
+if(HAVE_CUDA)
+  # pass include pathes to cuda_include_directories()
+  set(Caffe_ALL_INCLUDE_DIRS ${Caffe_INCLUDE_DIRS})
+  list(REMOVE_ITEM Caffe_ALL_INCLUDE_DIRS PRIVATE PUBLIC)
+  cuda_include_directories(${Caffe_INCLUDE_DIR} ${Caffe_SRC_DIR} ${Caffe_ALL_INCLUDE_DIRS})
+
+  # add definitions to nvcc flags directly
+  set(Caffe_ALL_DEFINITIONS ${Caffe_DEFINITIONS})
+  list(REMOVE_ITEM Caffe_ALL_DEFINITIONS PRIVATE PUBLIC)
+  list(APPEND CUDA_NVCC_FLAGS ${Caffe_ALL_DEFINITIONS})
+endif()
 
 # ---[ Subdirectories
 add_subdirectory(src/gtest)

cmake/ConfigGen.cmake

@@ -1,31 +1,4 @@
 
-################################################################################################
-# Helper function to fetch caffe includes which will be passed to dependent projects
-# Usage:
-#   caffe_get_current_includes(<includes_list_variable>)
-function(caffe_get_current_includes includes_variable)
-  get_property(current_includes DIRECTORY PROPERTY INCLUDE_DIRECTORIES)
-  caffe_convert_absolute_paths(current_includes)
-
-  # remove at most one ${PROJECT_BINARY_DIR} include added for caffe_config.h
-  list(FIND current_includes ${PROJECT_BINARY_DIR} __index)
-  list(REMOVE_AT current_includes ${__index})
-
-  # removing numpy includes (since not required for client libs)
-  set(__toremove "")
-  foreach(__i ${current_includes})
-    if(${__i} MATCHES "python")
-      list(APPEND __toremove ${__i})
-    endif()
-  endforeach()
-  if(__toremove)
-    list(REMOVE_ITEM current_includes ${__toremove})
-  endif()
-
-  caffe_list_unique(current_includes)
-  set(${includes_variable} ${current_includes} PARENT_SCOPE)
-endfunction()
-
 ################################################################################################
 # Helper function to get all list items that begin with given prefix
 # Usage:
@@ -47,39 +20,15 @@ endfunction()
 function(caffe_generate_export_configs)
   set(install_cmake_suffix "share/Caffe")
 
-  # ---[ Configure build-tree CaffeConfig.cmake file ]---
-  caffe_get_current_includes(Caffe_INCLUDE_DIRS)
-
-  set(Caffe_DEFINITIONS "")
   if(NOT HAVE_CUDA)
     set(HAVE_CUDA FALSE)
-    list(APPEND Caffe_DEFINITIONS -DCPU_ONLY)
-  endif()
-
-  if(USE_OPENCV)
-    list(APPEND Caffe_DEFINITIONS -DUSE_OPENCV)
-  endif()
-
-  if(USE_LMDB)
-    list(APPEND Caffe_DEFINITIONS -DUSE_LMDB)
-    if (ALLOW_LMDB_NOLOCK)
-        list(APPEND Caffe_DEFINITIONS -DALLOW_LMDB_NOLOCK)
-    endif()
-  endif()
-
-  if(USE_LEVELDB)
-    list(APPEND Caffe_DEFINITIONS -DUSE_LEVELDB)
   endif()
 
   if(NOT HAVE_CUDNN)
     set(HAVE_CUDNN FALSE)
-  else()
-    list(APPEND DEFINITIONS -DUSE_CUDNN)
   endif()
 
-  if(BLAS STREQUAL "MKL" OR BLAS STREQUAL "mkl")
-    list(APPEND Caffe_DEFINITIONS -DUSE_MKL)
-  endif()
+  # ---[ Configure build-tree CaffeConfig.cmake file ]---
 
   configure_file("cmake/Templates/CaffeConfig.cmake.in" "${PROJECT_BINARY_DIR}/CaffeConfig.cmake" @ONLY)
 
@@ -89,18 +38,6 @@ function(caffe_generate_export_configs)
 
   # ---[ Configure install-tree CaffeConfig.cmake file ]---
 
-  # remove source and build dir includes
-  caffe_get_items_with_prefix(${PROJECT_SOURCE_DIR} Caffe_INCLUDE_DIRS __insource)
-  caffe_get_items_with_prefix(${PROJECT_BINARY_DIR} Caffe_INCLUDE_DIRS __inbinary)
-  list(REMOVE_ITEM Caffe_INCLUDE_DIRS ${__insource} ${__inbinary})
-
-  # add `install` include folder
-  set(lines
-     "get_filename_component(__caffe_include \"\${Caffe_CMAKE_DIR}/../../include\" ABSOLUTE)\n"
-     "list(APPEND Caffe_INCLUDE_DIRS \${__caffe_include})\n"
-     "unset(__caffe_include)\n")
-  string(REPLACE ";" "" Caffe_INSTALL_INCLUDE_DIR_APPEND_COMMAND ${lines})
-
   configure_file("cmake/Templates/CaffeConfig.cmake.in" "${PROJECT_BINARY_DIR}/cmake/CaffeConfig.cmake" @ONLY)
 
   # Install the CaffeConfig.cmake and export set to use with install-tree

cmake/Cuda.cmake

@@ -238,17 +238,17 @@ endif()
 
 set(HAVE_CUDA TRUE)
 message(STATUS "CUDA detected: " ${CUDA_VERSION})
-include_directories(SYSTEM ${CUDA_INCLUDE_DIRS})
-list(APPEND Caffe_LINKER_LIBS ${CUDA_CUDART_LIBRARY}
-                              ${CUDA_curand_LIBRARY} ${CUDA_CUBLAS_LIBRARIES})
+list(APPEND Caffe_INCLUDE_DIRS PUBLIC ${CUDA_INCLUDE_DIRS})
+list(APPEND Caffe_LINKER_LIBS PUBLIC ${CUDA_CUDART_LIBRARY}
+                                     ${CUDA_curand_LIBRARY} ${CUDA_CUBLAS_LIBRARIES})
 
 # cudnn detection
 if(USE_CUDNN)
   detect_cuDNN()
   if(HAVE_CUDNN)
-    add_definitions(-DUSE_CUDNN)
-    include_directories(SYSTEM ${CUDNN_INCLUDE})
-    list(APPEND Caffe_LINKER_LIBS ${CUDNN_LIBRARY})
+    list(APPEND Caffe_DEFINITIONS PUBLIC -DUSE_CUDNN)
+    list(APPEND Caffe_INCLUDE_DIRS PUBLIC ${CUDNN_INCLUDE})
+    list(APPEND Caffe_LINKER_LIBS PUBLIC ${CUDNN_LIBRARY})
   endif()
 endif()
 

cmake/Dependencies.cmake

@@ -1,57 +1,67 @@
 # This list is required for static linking and exported to CaffeConfig.cmake
 set(Caffe_LINKER_LIBS "")
+set(Caffe_INCLUDE_DIRS "")
+set(Caffe_DEFINITIONS "")
 
 # ---[ Boost
 find_package(Boost 1.46 REQUIRED COMPONENTS system thread filesystem)
-include_directories(SYSTEM ${Boost_INCLUDE_DIRS})
-list(APPEND Caffe_LINKER_LIBS ${Boost_LIBRARIES})
+list(APPEND Caffe_INCLUDE_DIRS PUBLIC ${Boost_INCLUDE_DIRS})
+list(APPEND Caffe_LINKER_LIBS PUBLIC ${Boost_LIBRARIES})
 
 # ---[ Threads
 find_package(Threads REQUIRED)
-list(APPEND Caffe_LINKER_LIBS ${CMAKE_THREAD_LIBS_INIT})
+list(APPEND Caffe_LINKER_LIBS PRIVATE ${CMAKE_THREAD_LIBS_INIT})
+
+# ---[ OpenMP
+if(USE_OPENMP)
+  # TODO: use something exportable here
+  find_package(OpenMP REQUIRED)
+  set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${OpenMP_C_FLAGS}")
+  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${OpenMP_CXX_FLAGS}")
+endif()
 
 # ---[ Google-glog
 include("cmake/External/glog.cmake")
-include_directories(SYSTEM ${GLOG_INCLUDE_DIRS})
-list(APPEND Caffe_LINKER_LIBS ${GLOG_LIBRARIES})
+list(APPEND Caffe_INCLUDE_DIRS PUBLIC ${GLOG_INCLUDE_DIRS})
+list(APPEND Caffe_LINKER_LIBS PUBLIC ${GLOG_LIBRARIES})
 
 # ---[ Google-gflags
 include("cmake/External/gflags.cmake")
-include_directories(SYSTEM ${GFLAGS_INCLUDE_DIRS})
-list(APPEND Caffe_LINKER_LIBS ${GFLAGS_LIBRARIES})
+list(APPEND Caffe_INCLUDE_DIRS PUBLIC ${GFLAGS_INCLUDE_DIRS})
+list(APPEND Caffe_LINKER_LIBS PUBLIC ${GFLAGS_LIBRARIES})
 
 # ---[ Google-protobuf
 include(cmake/ProtoBuf.cmake)
 
 # ---[ HDF5
 find_package(HDF5 COMPONENTS HL REQUIRED)
-include_directories(SYSTEM ${HDF5_INCLUDE_DIRS})
-list(APPEND Caffe_LINKER_LIBS ${HDF5_LIBRARIES} ${HDF5_HL_LIBRARIES})
+list(APPEND Caffe_INCLUDE_DIRS PUBLIC ${HDF5_INCLUDE_DIRS})
+list(APPEND Caffe_LINKER_LIBS PUBLIC ${HDF5_LIBRARIES} ${HDF5_HL_LIBRARIES})
 
 # ---[ LMDB
 if(USE_LMDB)
   find_package(LMDB REQUIRED)
-  include_directories(SYSTEM ${LMDB_INCLUDE_DIR})
-  list(APPEND Caffe_LINKER_LIBS ${LMDB_LIBRARIES})
-  add_definitions(-DUSE_LMDB)
+  list(APPEND Caffe_INCLUDE_DIRS PUBLIC ${LMDB_INCLUDE_DIR})
+  list(APPEND Caffe_LINKER_LIBS PUBLIC ${LMDB_LIBRARIES})
+  list(APPEND Caffe_DEFINITIONS PUBLIC -DUSE_LMDB)
   if(ALLOW_LMDB_NOLOCK)
-    add_definitions(-DALLOW_LMDB_NOLOCK)
+    list(APPEND Caffe_DEFINITIONS PRIVATE -DALLOW_LMDB_NOLOCK)
   endif()
 endif()
 
 # ---[ LevelDB
 if(USE_LEVELDB)
   find_package(LevelDB REQUIRED)
-  include_directories(SYSTEM ${LevelDB_INCLUDES})
-  list(APPEND Caffe_LINKER_LIBS ${LevelDB_LIBRARIES})
-  add_definitions(-DUSE_LEVELDB)
+  list(APPEND Caffe_INCLUDE_DIRS PUBLIC ${LevelDB_INCLUDES})
+  list(APPEND Caffe_LINKER_LIBS PUBLIC ${LevelDB_LIBRARIES})
+  list(APPEND Caffe_DEFINITIONS PUBLIC -DUSE_LEVELDB)
 endif()
 
 # ---[ Snappy
 if(USE_LEVELDB)
   find_package(Snappy REQUIRED)
-  include_directories(SYSTEM ${Snappy_INCLUDE_DIR})
-  list(APPEND Caffe_LINKER_LIBS ${Snappy_LIBRARIES})
+  list(APPEND Caffe_INCLUDE_DIRS PRIVATE ${Snappy_INCLUDE_DIR})
+  list(APPEND Caffe_LINKER_LIBS PRIVATE ${Snappy_LIBRARIES})
 endif()
 
 # ---[ CUDA
@@ -63,8 +73,7 @@ if(NOT HAVE_CUDA)
     message(WARNING "-- CUDA is not detected by cmake. Building without it...")
   endif()
 
-  # TODO: remove this not cross platform define in future. Use caffe_config.h instead.
-  add_definitions(-DCPU_ONLY)
+  list(APPEND Caffe_DEFINITIONS PUBLIC -DCPU_ONLY)
 endif()
 
 # ---[ OpenCV
@@ -73,10 +82,10 @@ if(USE_OPENCV)
   if(NOT OpenCV_FOUND) # if not OpenCV 3.x, then imgcodecs are not found
     find_package(OpenCV REQUIRED COMPONENTS core highgui imgproc)
   endif()
-  include_directories(SYSTEM ${OpenCV_INCLUDE_DIRS})
-  list(APPEND Caffe_LINKER_LIBS ${OpenCV_LIBS})
+  list(APPEND Caffe_INCLUDE_DIRS PUBLIC ${OpenCV_INCLUDE_DIRS})
+  list(APPEND Caffe_LINKER_LIBS PUBLIC ${OpenCV_LIBS})
   message(STATUS "OpenCV found (${OpenCV_CONFIG_PATH})")
-  add_definitions(-DUSE_OPENCV)
+  list(APPEND Caffe_DEFINITIONS PUBLIC -DUSE_OPENCV)
 endif()
 
 # ---[ BLAS
@@ -86,26 +95,26 @@ if(NOT APPLE)
 
   if(BLAS STREQUAL "Atlas" OR BLAS STREQUAL "atlas")
     find_package(Atlas REQUIRED)
-    include_directories(SYSTEM ${Atlas_INCLUDE_DIR})
-    list(APPEND Caffe_LINKER_LIBS ${Atlas_LIBRARIES})
+    list(APPEND Caffe_INCLUDE_DIRS PUBLIC ${Atlas_INCLUDE_DIR})
+    list(APPEND Caffe_LINKER_LIBS PUBLIC ${Atlas_LIBRARIES})
   elseif(BLAS STREQUAL "Open" OR BLAS STREQUAL "open")
     find_package(OpenBLAS REQUIRED)
-    include_directories(SYSTEM ${OpenBLAS_INCLUDE_DIR})
-    list(APPEND Caffe_LINKER_LIBS ${OpenBLAS_LIB})
+    list(APPEND Caffe_INCLUDE_DIRS PUBLIC ${OpenBLAS_INCLUDE_DIR})
+    list(APPEND Caffe_LINKER_LIBS PUBLIC ${OpenBLAS_LIB})
   elseif(BLAS STREQUAL "MKL" OR BLAS STREQUAL "mkl")
     find_package(MKL REQUIRED)
-    include_directories(SYSTEM ${MKL_INCLUDE_DIR})
-    list(APPEND Caffe_LINKER_LIBS ${MKL_LIBRARIES})
-    add_definitions(-DUSE_MKL)
+    list(APPEND Caffe_INCLUDE_DIRS PUBLIC ${MKL_INCLUDE_DIR})
+    list(APPEND Caffe_LINKER_LIBS PUBLIC ${MKL_LIBRARIES})
+    list(APPEND Caffe_DEFINITIONS PUBLIC -DUSE_MKL)
   endif()
 elseif(APPLE)
   find_package(vecLib REQUIRED)
-  include_directories(SYSTEM ${vecLib_INCLUDE_DIR})
-  list(APPEND Caffe_LINKER_LIBS ${vecLib_LINKER_LIBS})
+  list(APPEND Caffe_INCLUDE_DIRS PUBLIC ${vecLib_INCLUDE_DIR})
+  list(APPEND Caffe_LINKER_LIBS PUBLIC ${vecLib_LINKER_LIBS})
 
   if(VECLIB_FOUND)
     if(NOT vecLib_INCLUDE_DIR MATCHES "^/System/Library/Frameworks/vecLib.framework.*")
-      add_definitions(-DUSE_ACCELERATE)
+      list(APPEND Caffe_DEFINITIONS PUBLIC -DUSE_ACCELERATE)
     endif()
   endif()
 endif()
@@ -149,9 +158,9 @@ if(BUILD_python)
   if(PYTHONLIBS_FOUND AND NUMPY_FOUND AND Boost_PYTHON_FOUND)
     set(HAVE_PYTHON TRUE)
     if(BUILD_python_layer)
-      add_definitions(-DWITH_PYTHON_LAYER)
-      include_directories(SYSTEM ${PYTHON_INCLUDE_DIRS} ${NUMPY_INCLUDE_DIR} ${Boost_INCLUDE_DIRS})
-      list(APPEND Caffe_LINKER_LIBS ${PYTHON_LIBRARIES} ${Boost_LIBRARIES})
+      list(APPEND Caffe_DEFINITIONS PRIVATE -DWITH_PYTHON_LAYER)
+      list(APPEND Caffe_INCLUDE_DIRS PRIVATE ${PYTHON_INCLUDE_DIRS} ${NUMPY_INCLUDE_DIR} PUBLIC ${Boost_INCLUDE_DIRS})
+      list(APPEND Caffe_LINKER_LIBS PRIVATE ${PYTHON_LIBRARIES} PUBLIC ${Boost_LIBRARIES})
     endif()
   endif()
 endif()

cmake/ProtoBuf.cmake

@@ -2,8 +2,8 @@
 # the standard cmake script with version and python generation support
 
 find_package( Protobuf REQUIRED )
-include_directories(SYSTEM ${PROTOBUF_INCLUDE_DIR})
-list(APPEND Caffe_LINKER_LIBS ${PROTOBUF_LIBRARIES})
+list(APPEND Caffe_INCLUDE_DIRS PUBLIC ${PROTOBUF_INCLUDE_DIR})
+list(APPEND Caffe_LINKER_LIBS PUBLIC ${PROTOBUF_LIBRARIES})
 
 # As of Ubuntu 14.04 protoc is no longer a part of libprotobuf-dev package
 # and should be installed separately as in: sudo apt-get install protobuf-compiler

cmake/Templates/CaffeConfig.cmake.in

@@ -9,9 +9,9 @@
 # After successful configuration the following variables
 # will be defined:
 #
-#   Caffe_INCLUDE_DIRS - Caffe include directories
-#   Caffe_LIBRARIES    - libraries to link against
-#   Caffe_DEFINITIONS  - a list of definitions to pass to compiler
+#   Caffe_LIBRARIES    - IMPORTED targets to link against
+#                        (There is no Caffe_INCLUDE_DIRS and Caffe_DEFINITIONS
+#                         because they are specified in the IMPORTED target interface.)
 #
 #   Caffe_HAVE_CUDA    - signals about CUDA support
 #   Caffe_HAVE_CUDNN   - signals about cuDNN support
@@ -39,21 +39,16 @@ endif()
 
 # Compute paths
 get_filename_component(Caffe_CMAKE_DIR "${CMAKE_CURRENT_LIST_FILE}" PATH)
-set(Caffe_INCLUDE_DIRS "@Caffe_INCLUDE_DIRS@")
-
-@Caffe_INSTALL_INCLUDE_DIR_APPEND_COMMAND@
 
 # Our library dependencies
 if(NOT TARGET caffe AND NOT caffe_BINARY_DIR)
   include("${Caffe_CMAKE_DIR}/CaffeTargets.cmake")
 endif()
 
 # List of IMPORTED libs created by CaffeTargets.cmake
+# These targets already specify all needed definitions and include pathes
 set(Caffe_LIBRARIES caffe)
 
-# Definitions
-set(Caffe_DEFINITIONS "@Caffe_DEFINITIONS@")
-
 # Cuda support variables
 set(Caffe_CPU_ONLY @CPU_ONLY@)
 set(Caffe_HAVE_CUDA @HAVE_CUDA@)

python/CMakeLists.txt

@@ -3,13 +3,13 @@ if(NOT HAVE_PYTHON)
   return()
 endif()
 
-include_directories(${PYTHON_INCLUDE_DIRS} ${NUMPY_INCLUDE_DIR} ${Boost_INCLUDE_DIRS})
 file(GLOB_RECURSE python_srcs ${PROJECT_SOURCE_DIR}/python/*.cpp)
 
 add_library(pycaffe SHARED ${python_srcs})
-target_link_libraries(pycaffe ${Caffe_LINK} ${PYTHON_LIBRARIES} ${Boost_LIBRARIES})
-set_target_properties(pycaffe PROPERTIES PREFIX "" OUTPUT_NAME "_caffe")
 caffe_default_properties(pycaffe)
+set_target_properties(pycaffe PROPERTIES PREFIX "" OUTPUT_NAME "_caffe")
+target_include_directories(pycaffe PUBLIC ${PYTHON_INCLUDE_DIRS} ${NUMPY_INCLUDE_DIR})
+target_link_libraries(pycaffe PUBLIC ${Caffe_LINK} ${PYTHON_LIBRARIES})
 
 if(UNIX OR APPLE)
     set(__linkname "${PROJECT_SOURCE_DIR}/python/caffe/_caffe.so")