matplotplusplus 1.0.1 (new formula)

[ankane]

• Have you followed the guidelines for contributing?
• Have you checked that there aren't other open pull requests for the same formula update/change?
• Have you built your formula locally with brew install --build-from-source <formula>, where <formula> is the name of the formula you're submitting?
• Is your test running fine brew test <formula>, where <formula> is the name of the formula you're submitting?
• Does your build pass brew audit --strict <formula> (after doing brew install <formula>)?

---

C++ graphics library

[ankane]

Failing on 10.14 and 10.13 with:

-- Looking for C++ include filesystem
-- Looking for C++ include filesystem - found
-- Performing Test CXX_FILESYSTEM_NO_LINK_NEEDED
-- Performing Test CXX_FILESYSTEM_NO_LINK_NEEDED - Failed
-- Performing Test CXX_FILESYSTEM_STDCPPFS_NEEDED
-- Performing Test CXX_FILESYSTEM_STDCPPFS_NEEDED - Failed
-- Performing Test CXX_FILESYSTEM_CPPFS_NEEDED
-- Performing Test CXX_FILESYSTEM_CPPFS_NEEDED - Failed
CMake Error at cmake/FindFilesystem.cmake:246 (message):
  Cannot run simple program using std::filesystem

Trying gcc.

[BrewTestBot]

@chenrui333 has triggered a merge.

[ankane]

Thanks all!