How to Properly Use LuaJIT with sol2 via vcpkg

[mehah]

D:...\vc17\vcpkg_installed\x64-windows-static\include\sol\compatibility\lua_version.hpp(39,12): error C1083: Cannot open include file: 'lua.h': No such file or directory

The include for my LuaJIT (via vcpkg) is #include <luajit/lua.hpp>.
path: D:...\vc17\vcpkg_installed\x64-windows-static\include\luajit\lua.hpp

sol2 includes it using a different path.

[shohnwal]

You say you have the .hpp files in your include path, but it seemingly wants the .h files, due to the compilation flags (both SOL_USE_CXX_LUA and SOL_USE_LUA_HPP are turned off, so it choses the 'else' path for including files)

Do you have the red-marked lua header files (.h) visible in your project's include paths?
If I remember correctly, you compile LuaJit to produce the .lib files. Then you copy the lib files AND the required header files (.h) from the LuaJit source folder (lua.h, luaxlib.h, etc) somewhere where your project can see them (include paths/library paths).

[mehah]

@shohnwal

My entire project is managed with vcpkg, and LuaJIT is already included as a dependency.

I explicitly include LuaJIT using:

#include <luajit/lua.hpp>

and not:

#include <luajit.hpp>
or
#include <luajit.h>

Because of this, the build system is not finding the expected headers. It is looking for the traditional .h files or a different include layout, while my project is configured to use the luajit/lua.hpp header provided by vcpkg.

[EvanBalster]

I'm using vcpkg with sol2 and luajit without issue on Windows and Linux. My project is built with CMake and uses vcpkg in manifest mode to install dependencies to its directory. But I'm also compiling with C++20 and it appears that sol2 takes advantage of __has_include to autodetect the location of the lua headers.