Could NOT find Glog (missing: GLOG_INCLUDE_DIR GLOG_LIBRARY) - c++

Question

I am trying to install openpose in Ubuntu 20.04 using CMAKE and I get the following error:
Could NOT find Glog (missing: GLOG_INCLUDE_DIR GLOG_LIBRARY)
I am following the instructions here (unfortunately, the screenshots are not available but I just followed the textual commands):
https://github.com/CMU-Perceptual-Computing-Lab/openpose/blob/master/doc/installation/README.md
I made a build folder in openpose folder and then ran the cmake-gui .. command.
A GUI opens with all these checked (I don't change anything):
and the error is:
GCC detected, adding compile flags
GCC detected, adding compile flags
Building with CUDA.
CUDA detected: 10.1
Added CUDA NVCC flags for: sm_75
cuDNN not found
Found gflags (include: /usr/include, library: /usr/lib/x86_64-linux-gnu/libgflags.so)
Could NOT find Glog (missing: GLOG_INCLUDE_DIR GLOG_LIBRARY)
CMake Warning at /usr/share/cmake-3.16/Modules/FindProtobuf.cmake:499 (message):
Protobuf compiler version 3.13.0 doesn't match library version 3.6.1
Call Stack (most recent call first):
CMakeLists.txt:429 (find_package)
Found Protobuf: /usr/lib/x86_64-linux-gnu/libprotobuf.so;-lpthread (found version "3.6.1")
Found OpenCV: /usr (found version "4.2.0")
cuDNN not found.
#!/bin/bash
echo "This script assumes Ubuntu 16 or 14 and Nvidia Graphics card up to 10XX. Otherwise, it will fail."
# Install cuDNN 5.1
if [[ $UBUNTU_VERSION == *"14."* ]] || [[ $UBUNTU_VERSION == *"15."* ]] || [[ $UBUNTU_VERSION == *"16."* ]]; then
CUDNN_URL="http://developer.download.nvidia.com/compute/redist/cudnn/v5.1/cudnn-8.0-linux-x64-v5.1.tgz"
wget -c ${CUDNN_URL}
sudo tar -xzf cudnn-8.0-linux-x64-v5.1.tgz -C /usr/local
rm cudnn-8.0-linux-x64-v5.1.tgz && sudo ldconfig
else
echo "cuDNN NOT INSTALLED! Ubuntu 16 or 14 not found. Install cuDNN manually from 'https://developer.nvidia.com/cudnn'."
fi
CMake Error at CMakeLists.txt:520 (message):
Install cuDNN using the above commands. or turn off cuDNN by setting
USE_CUDNN to OFF.
Configuring incomplete, errors occurred!
See also "/home/mona/research/code/openpose/build/CMakeFiles/CMakeOutput.log".
See also "/home/mona/research/code/openpose/build/CMakeFiles/CMakeError.log".
Then, I installed gflags using sudo apt-get install libgflags-dev command but I still get the same error. How could I fix this problem?
This is the git log to see which version of repo I am at for reproducing the error:
$ git log
commit a255747af22116ad76004437456bb531dc5d0b23 (HEAD -> master, origin/master, origin/HEAD)
Author: Wlad Meixner <9556979+gosticks#users.noreply.github.com>
Date: Mon Dec 21 22:01:10 2020 +0100
Fix possible typo (#1802)
The CMakeOutput.log and CMakeError.log can be found here https://github.com/CMU-Perceptual-Computing-Lab/openpose/issues/1814

Answer 1

$ sudo apt install libgoogle-glog-dev
Also,
$ sudo apt-get install libgflags-dev
$ sudo apt install libgoogle-glog-dev
$ sudo apt-get install protobuf-compiler libprotobuf-dev
since initially I didn't have any of them installed.

Answer 2

If you have run it from the command line you should have see them...
if (NOT GLOG_FOUND)
message(FATAL_ERROR "Glog not found. Install Glog from the command line using the command(s) -\
sudo apt-get install libgoogle-glog-dev")
endif (NOT GLOG_FOUND)
if (NOT GFLAGS_FOUND)
message(FATAL_ERROR "GFlags not found. Install GFlags from the command line using the command(s) --\
sudo apt-get install libgflags-dev")
endif (NOT GFLAGS_FOUND)
if (NOT OpenCV_FOUND)
message(FATAL_ERROR "OpenCV not found. Install OpenCV from the command line using the command(s) --\
sudo apt-get install libopencv-dev")
endif (NOT OpenCV_FOUND)
ref: https://github.com/CMU-Perceptual-Computing-Lab/openpose/blob/5a9acc730915f2171badcf10076aef9213f38e01/CMakeLists.txt#L523-L537
note: A better way, would be to use FetchContent() when third parties are missing (since they provide a CMake based build), also the command provided is ubuntu only...