kthohr / optim

When trying to install with header files only, the directory BaseMatrixOps is empty. The following shell command demonstrates the issue, since the last ls statement shows that the directory is empty.

git clone https://github.com/kthohr/optim.git && cd optim && \
./configure --header-only-version && ls header_only_version/BaseMatrixOps

This further causes the following error when trying to compile with #include "optim.hpp"

fatal error: 'BaseMatrixOps/include/BaseMatrixOps.hpp' file not found
#include "BaseMatrixOps/include/BaseMatrixOps.hpp"
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Presumably the error message occurs because of this line, i.e., optim.hpp requires the BaseMatrixOps directory to not be empty.

optim/include/optim.hpp

Line 28 in d480ec8

#include "BaseMatrixOps/include/BaseMatrixOps.hpp"

The directory is empty because you did not run:

git submodule update --init

BaseMatrixOps is empty when installing header files only