CMake tool deprecated exec_program command.

[f6bvp]

Report on exec_program CMake Warning

The following message was observed during the compilation/installation of indi-core:

CMake Warning (dev) at drivers/telescope/make_lx200generic_symlink.cmake:33 (exec_program):
Policy CMP0153 is not set: The exec_program command should not be called.
Run "cmake --help-policy CMP0153" for policy details. Use the cmake_policy
command to set the policy and suppress this warning.

Use execute_process() instead.
Call Stack (most recent call first):
drivers/telescope/cmake_install.cmake:514 (include)
drivers/cmake_install.cmake:47 (include)
cmake_install.cmake:119 (include)
This warning is for project developers. Use -Wno-dev to suppress it.

Analysis and Request

This is a non-critical developer warning from the CMake tool, related to the deprecated exec_program command.

The script drivers/telescope/make_lx200generic_symlink.cmake on line 33 is using an old command which modern CMake versions (and policy CMP0153) flag as obsolete, recommending the use of execute_process() instead.

While this did not prevent the successful installation of the INDI core libraries, addressing this would clean up the build output for users building from source.

Suggested Fix: Replace the deprecated exec_program command call with the modern execute_process() command in drivers/telescope/make_lx200generic_symlink.cmake.

Bernard (with help from Gemini !)