cmake error on Ubuntu

[Choyaa]

hi, I really admire your work.
I met the problem when compiling C++ library with cmake , I have installed cmake==3.22.1.
ubuntu@ubuntu:~/Documents/instant-ngp-master/build$ cmake -version cmake version 3.22.1

I tried 'cmake . -B build', but got error as below:
ubuntu@ubuntu:~/Documents/instant-ngp-master$ cmake . -B build
CMake Error: The source directory "/home/ubuntu/Documents/instant-ngp-master/build" does not exist.
after 'mkdir build', it got a new error as below:
ubuntu@ubuntu:~/Documents/instant-ngp-master$ mkdir build
ubuntu@ubuntu:~/Documents/instant-ngp-master$ cmake . -B build
CMake Error: The source directory "/home/ubuntu/Documents/instant-ngp-master/build" does not appear to contain CMakeLists.txt.

I have never met such error but copied CMakeLists.txt to build/CMakeLists.txt, a new error as below:
ubuntu@ubuntu:~/Documents/instant-ngp-master$ cmake . -B build
`-- The C compiler identification is GNU 7.5.0
-- The CXX compiler identification is GNU 7.5.0
-- The CUDA compiler identification is NVIDIA 11.1.105
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working C compiler: /usr/bin/cc - skipped
-- Detecting C compile features
-- Detecting C compile features - done
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Check for working CXX compiler: /usr/bin/c++ - skipped
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Detecting CUDA compiler ABI info
-- Detecting CUDA compiler ABI info - done
-- Check for working CUDA compiler: /usr/local/cuda-11.1/bin/nvcc - skipped
-- Detecting CUDA compile features
-- Detecting CUDA compile features - done
-- No release type specified. Setting to 'Release'.
CMake Error at CMakeLists.txt:96 (add_subdirectory):
add_subdirectory given source "dependencies/glfw" which is not an existing
directory.

CMake Error at CMakeLists.txt:98 (set_target_properties):
set_target_properties Can not find target to add properties to: glfw
...`

I also tried the compile method I used before:
mkdir build cd build cmake .., got same error.

I am not familiar with CMAKE, and just learned ‘cmake . -B build‘ could create the build directory automatically . My Ubuntu is 18.04, Now I have no idea what to do next , and would appreciate your help.

[Tom94]

Hi there! Looks like you forgot the --recursive flag when cloning this repository.

Running git submodule update --init --recursive should fix it up. Then, run cmake again.

(And thank you very much for the kind words!)

[Choyaa]

Thanks!!! I got it

Hi there! Looks like you forgot the --recursive flag when cloning this repository.

Running git submodule update --init --recursive should fix it up. Then, run cmake again.

(And thank you very much for the kind words!)

[grey-area]

Worth noting I had exactly the same output and it wasn't because I hadn't recursively cloned the repo; in my case it was an old version of CMake.

The -B flag was introduced in CMake 3.13.

When running "cmake . -B build", older versions of CMake will look for source files in "bulid"

[resurgo97]

I had a similar problem and git submodule update --init --recursive after cloning did not solve it.
Neither was it because of the version of CMake.
Rather, adding --recursive flag when cloning in the first place only worked for me.

[nudro]

upgrading cmake (https://askubuntu.com/questions/1203635/installing-latest-cmake-on-ubuntu-18-04-3-lts-run-via-wsl-openssl-error), and:

git clone https://github.com/NVlabs/instant-ngp.git --recursive

worked for me.