Issue Summary

Documentation and error messages are misleading when using a release version of Caffe on Ubuntu.

Executed Command (if any)

cmake .. -DBUILD_CAFFE=OFF -DCaffe_INCLUDE_DIRS=/usr/include/caffe -DCaffe_LIBS=/usr/lib/x86_64-linux-gnu/libcaffe.so

OpenPose Output (if any)

-- The C compiler identification is GNU 7.5.0
-- The CXX compiler identification is GNU 7.5.0
-- Check for working C compiler: /usr/bin/cc
-- Check for working C compiler: /usr/bin/cc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Detecting C compile features
-- Detecting C compile features - done
-- Check for working CXX compiler: /usr/bin/c++
-- Check for working CXX compiler: /usr/bin/c++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- GCC detected, adding compile flags
-- GCC detected, adding compile flags
-- Looking for pthread.h
-- Looking for pthread.h - found
-- Looking for pthread_create
-- Looking for pthread_create - not found
-- Looking for pthread_create in pthreads
-- Looking for pthread_create in pthreads - not found
-- Looking for pthread_create in pthread
-- Looking for pthread_create in pthread - found
-- Found Threads: TRUE
-- Found CUDA: /usr/local/cuda (found version "10.1")
-- Building with CUDA.
-- CUDA detected: 10.1
-- Found cuDNN: ver. 7.6.5 found (include: /usr/include, library: /usr/lib/x86_64-linux-gnu/libcudnn.so)
-- Added CUDA NVCC flags for: sm_75
-- Found cuDNN: ver. 7.6.5 found (include: /usr/include, library: /usr/lib/x86_64-linux-gnu/libcudnn.so)
-- Found GFlags: /usr/include
-- Found gflags  (include: /usr/include, library: /usr/lib/x86_64-linux-gnu/libgflags.so)
-- Found Glog: /usr/include
-- Found glog    (include: /usr/include, library: /usr/lib/x86_64-linux-gnu/libglog.so)
-- Found Protobuf: /usr/lib/x86_64-linux-gnu/libprotobuf.so;-lpthread (found version "3.0.0")
-- Found OpenCV: /usr (found version "3.2.0")
CMake Error at CMakeLists.txt:839 (message):
  Caffe not found.  Either turn on the BUILD_CAFFE option or specify the path
  of Caffe includes

          and libs using -DCaffe_INCLUDE_DIRS and -DCaffe_LIBS.


-- Configuring incomplete, errors occurred!
See also "/home/ian/sw/src/openpose/build/CMakeFiles/CMakeOutput.log".
See also "/home/ian/sw/src/openpose/build/CMakeFiles/CMakeError.log".

Errors (if any)

Caffe not found.  Either turn on the BUILD_CAFFE option or specify the path
  of Caffe includes

          and libs using -DCaffe_INCLUDE_DIRS and -DCaffe_LIBS.

Type of Issue

• Compilation/installation error

Your System Configuration

1. Whole console output see above

2. OpenPose version: 3915b92

3. General configuration:

   • Installation mode: cmake
   • Operating system Ubuntu 18.04.4 LTS
   • Operating system version Ubuntu 18
   • Release or Debug mode? release
   • Compiler gcc (Ubuntu 7.5.0-3ubuntu1~18.04) 7.5.0

4. Non-default settings:

   • 3-D Reconstruction module added? no
   • Any other custom CMake configuration with respect to the default version? (by default: no): -DBUILD_CAFFE=OFF -DCaffe_INCLUDE_DIRS=/usr/include/caffe -DCaffe_LIBS=/usr/lib/x86_64-linux-gnu/libcaffe.so

5. 3rd-party software:

   • Caffe version: release of libcaffe-cuda-dev installed from apt: 1.0.0-6build1
   • CMake version : 3.10.2
   • OpenCV version: release of libopencv-dev installed from apt: 3.2.0+dfsg-4ubuntu0.1

6. If GPU mode issue:

   • CUDA version: 10.1
   • cuDNN version: 7.6.5
   • GPU model (nvidia-smi in Ubuntu): RTX 2080

--

Documentation here (albeit for Mac version) and the CMake output generated here both say to set Caffe_LIBS if not building Caffe from source. However, CMake uses Caffe_LIBS_RELEASE