[OPEN-36] error "COPY_IF_DIFFERENT Macro invoked with incorrect arguments" due to emty (zero-length) strings in CMake variables that should not be empty - Second Life Bug Tracker

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Acceptance Criteria:
Copy3rdPartyLibs.cmake should error out with a meaningful message when one of the arguments it'd pass to copy_if_different would be empty.

To reproduce:

autobuild configure -c OpenSourceStandAloneRelWithDebInfo

Configuration succeeds with

[...]

-- Build files have been written to: [...]/build-linux-i686

Configuration fails with

[...]

CMake Error at cmake/Copy3rdPartyLibs.cmake:323 (copy_if_different):

  COPY_IF_DIFFERENT Macro invoked with incorrect arguments for macro named:

  COPY_IF_DIFFERENT

Call Stack (most recent call first):

  llcommon/CMakeLists.txt:14 (include)

[...]

-- Configuring incomplete, errors occurred!

ERROR: default configuration returned 1

For more information: try re-running your command with --verbose or --debug

depends on

STORM-1524 Fixes for viewer-autobuild for standalone

related

STORM-1524 Fixes for viewer-autobuild for standalone