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https://gitlab.kitware.com/cmake/cmake.git
synced 2026-09-25 04:09:36 +03:00
Mickaël Germain
d2ad140ef9
Add a PREDICATE selector to $<LIST:TRANSFORM> that chooses which elements to transform by evaluating a <body> per element (with $<_0> bound) and acting on those for which it yields "1". This selects by computed condition instead of the fixed AT/FOR/REGEX positions, so any generator expression -- including target queries -- can decide where an action applies. It works with both the canned actions and APPLY. Issue: #27892
29 lines
1.3 KiB
CMake
29 lines
1.3 KiB
CMake
enable_language(C)
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# Evaluate LINK_LIBRARIES transitively (CMP0189, CMake 4.1+); the test dir's
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# cmake_minimum_required would otherwise leave this OLD.
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cmake_policy(SET CMP0189 NEW)
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# A dependency tree with mixed library types:
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# app -> { netlib, plugin }; netlib -> { ssl, zlib }
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# netlib, ssl, zlib are STATIC_LIBRARY; plugin is INTERFACE_LIBRARY.
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add_library(ssl STATIC empty.c)
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add_library(zlib STATIC empty.c)
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add_library(plugin INTERFACE)
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add_library(netlib STATIC empty.c)
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target_link_libraries(netlib PUBLIC ssl zlib)
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add_library(app STATIC empty.c)
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target_link_libraries(app PRIVATE netlib plugin)
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# PREDICATE body reads each element's TYPE via TARGET_PROPERTY, demonstrating
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# that the body is evaluated in a target context (context-sensitivity). Only
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# STATIC_LIBRARY targets receive the PREPEND; INTERFACE_LIBRARY targets are
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# left unchanged.
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file(GENERATE OUTPUT "${CMAKE_CURRENT_BINARY_DIR}/filtered.txt"
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CONTENT "$<LIST:TRANSFORM,$<TARGET_PROPERTY:app,LINK_LIBRARIES>,PREPEND,lib:,PREDICATE,$<STREQUAL:$<TARGET_PROPERTY:$<_0>,TYPE>,STATIC_LIBRARY>>\n")
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# Exact reference: direct deps first (netlib, plugin), then netlib's transitive
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# deps (ssl, zlib); only the three STATIC targets gain the "lib:" prefix.
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file(GENERATE OUTPUT "${CMAKE_CURRENT_BINARY_DIR}/expected.txt"
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CONTENT "lib:netlib;plugin;lib:ssl;lib:zlib\n")
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