CMake cannot read symlink (OneDrive incompatibility)

[jclay]

When attempting to install freeglut on Windows 10, I am encountering a CMake build error indicating that the following copy command from the freeglut portfile does not work properly:

# ports/freeglut/portfile.cmake:57
file(COPY ${CMAKE_CURRENT_LIST_DIR}/usage DESTINATION ${CURRENT_PACKAGES_DIR}/share/${PORT})

I suspect this may be due to the fact that my project is inside OneDrive. In the output below, the error seems to indicate that CMake is unable to perform a copy if symlinks (in this case from OneDrive) are used. Anyone else run into a similar issue?

Full error message:

PS C:\Users\joel\OneDrive\dev\Project> .\win_tools\vcpkg\vcpkg.exe install freeglut
The following packages will be built and installed:
    freeglut[core]:x86-windows
Starting package 1/1: freeglut:x86-windows
Building package freeglut:x86-windows...
-- CURRENT_INSTALLED_DIR=C:/Users/joel/OneDrive/dev/Project/win_tools/vcpkg/installed/x86-windows
-- DOWNLOADS=C:/Users/joel/OneDrive/dev/Project/win_tools/vcpkg/downloads
-- CURRENT_PACKAGES_DIR=C:/Users/joel/OneDrive/dev/Project/win_tools/vcpkg/packages/freeglut_x86-windows
-- CURRENT_BUILDTREES_DIR=C:/Users/joel/OneDrive/dev/Project/win_tools/vcpkg/buildtrees/freeglut
-- CURRENT_PORT_DIR=C:/Users/joel/OneDrive/dev/Project/win_tools/vcpkg/ports/freeglut/.
-- Using cached C:/Users/joel/OneDrive/dev/Project/win_tools/vcpkg/downloads/freeglut-3.0.0.tar.gz
-- Testing integrity of cached file...
-- Testing integrity of cached file... OK
-- Extracting done
-- Configuring x86-windows-rel
-- Configuring x86-windows-rel done
-- Configuring x86-windows-dbg
-- Configuring x86-windows-dbg done
-- Build x86-windows-rel
-- Build x86-windows-rel done
-- Build x86-windows-dbg
-- Build x86-windows-dbg done
CMake Error at ports/freeglut/portfile.cmake:57 (file):
  file COPY cannot read symlink
  "C:/Users/joel/OneDrive/dev/Project/win_tools/vcpkg/ports/freeglut/usage"
  to duplicate at
  "C:/Users/joel/OneDrive/dev/Project/win_tools/vcpkg/packages/freeglut_x86-windows/share/freeglut/usage".
Call Stack (most recent call first):
  scripts/ports.cmake:72 (include)


Error: Building package freeglut:x86-windows failed with: BUILD_FAILED
Please ensure you're using the latest portfiles with `.\vcpkg update`, then
submit an issue at https://github.com/Microsoft/vcpkg/issues including:
  Package: freeglut:x86-windows
  Vcpkg version: 0.0.100-2018-01-02-0b1fa2834e79eeaecedadb4594f2243e382ce0f8

Additionally, attach any relevant sections from the log files above.

[GlieseRay]

I encountered the same cmake error on windows server 2012 and found that is caused by data deduplication.