build for android failed due to unable to find library -lpthread

[leleliu008]

android has no separated libpthread, it is included in libc

reference：https://developer.android.com/ndk/guides/stable_apis#c_library

in android.toolchain.cmake has folloing code which can be used to check if is Android platform

set(CMAKE_SYSTEM_NAME Android)

[zeux]

Note that lpthread is only needed by the CLI, which I wouldn't necessarily expect to build with the NDK? If you do need the CLI, feel free to submit a PR that fixes this.

[leleliu008]

there are two workaround, I would like to known which do fou prefer?

1

if (UNIX)
    find_library(LIBPTHREAD pthread)
    if (LIBPTHREAD)                      
         target_link_libraries(Luau.Repl.CLI PRIVATE pthread)
    endif()
endif()

2

if (UNIX)
    if (NOT "${CMAKE_SYSTEM_NAME}" STREQUAL Andriod)          
         target_link_libraries(Luau.Repl.CLI PRIVATE pthread)
    endif()
endif()

[zeux]

Either of these is probably fine. The first one seems a bit cleaner.

[zeux]

Fixed by #203.