Daksh Mamodiya 7fdf315ba3 cmake: Populate help string from documentation table for -D entries ...

When a built-in cache variable is set via `-D <var>=<value>` with no
help text supplied, populate `HELPSTRING` from the built-in
documentation table (sourced from `Help/variable/*.rst` and the
per-language pattern manuals).  Project-defined and unknown variables
continue to receive the legacy "No help, variable specified on the
command line." sentinel.

The cache entry's type and value are left untouched: type stays
`UNINITIALIZED` for bare `-D` and an explicit `-D <var>:TYPE=<value>`
is honored as before.  The `cmCacheManager::LoadCache` path is not
modified, so reload of existing caches is a fixed point.

Fixes: #27830

2026-05-28 09:25:41 -04:00

..

CheckCache.cmake

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CMakeLists.txt

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DefineSetsTypeAndHelp.cmake

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DefineTypePreserved.cmake

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DefineUnknownVarUninitialized.cmake

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PatternCxxClangTidy.cmake

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PatternHipCppcheck.cmake

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RunCMakeTest.cmake

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