Target std::filesystem was not found (g++11) about matplotplusplus

[alandefreitas]

Probably yes. It's related to this PR: #323

Although option(MATPLOTPP_BUILD_SHARED_LIBS "Build shared libraries" ${BUILD_SHARED_LIBS}) is correct. It lets the user customize it but also inherits the default behavior from the global CMake option.

The problem is that the std::filesystem interface target is not being installed in that CMake execution path. We could fix that or... since this is a C++17 library we could get rid of this target and stop supporting compilers that still don't have native std::filesystem support.

This target exists because most compilers back then supported C++17 language features but had not implemented std::filesystem yet.

[acxz]

I am also experiencing this issue.

[acxz]

I was able to solve the problem by using
-BUILD_SHARED_LIBS=ON \
instead of -DMATPLOTPP_BUILD_SHARED_LIBS=ON \

Looks like the following line is causing the issue:

matplotplusplus/CMakeLists.txt

Line 43 in 7b757c0

option(MATPLOTPP_BUILD_SHARED_LIBS "Build shared libraries" ${BUILD_SHARED_LIBS})

Maybe should be
option(MATPLOTPP_BUILD_SHARED_LIBS "Build shared libraries" OFF)

@alandefreitas is this an actual issue that needs to be fixed or is the current behavior desired?