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Daksh Mamodiya
503bdb9777
Extend the test_prep/<test> and test_prep/all build targets, generated from add_test(BUILD_DEPENDS) when CMAKE_TEST_BUILD_DEPENDS is enabled, to the Makefile generators. Previously only the Ninja and FASTBuild generators provided them. Resolve each test's dependencies in a shared layer so all command-line generators consume one result. cmTestGenerator now filters target dependencies to build-system targets and records, for each file dependency, the single target that produces it as a primary custom-command output (cmGlobalGenerator::FindOutputOwningTarget). The Makefile generators emit phony rules in CMakeFiles/Makefile2 depending on <target>.dir/all, with top-level forwarding rules. Sharing the resolution also stops Ninja and FASTBuild from emitting a dead test_prep edge for a non-buildable (e.g. INTERFACE) BUILD_DEPENDS target. On the Makefile generators a file dependency that no single target produces, and a test whose name contains ':', cannot be expressed as a recursive-make rule and are reported with a warning and skipped. Fixes: #27879