cmake/Tests/RunCMake/find_package/NestedConfig.cmake at master - cmake - SHS Gitea

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Brad King aae02ee60a find_package: Share package information among copies of package stack

Since commit ae373e93fb (install(PACKAGE_INFO): Add version and location
to package dependencies, 2025-07-31, v4.2.0-rc1~340^2) we add package
information to the current package's stack entry as it is discovered.
However, a nested package can cause the current package's stack entry to
be replaced by a copy with a new ordering index due to commit c6e6861e63
(install(EXPORT): Export find_dependency() calls, 2023-11-07,
v3.29.0-rc1~439^2~1).  Depending on whether imported targets were
created by the current package before finding the nested package, the
`CurrentPackageInfo` pointer is either invalidated, or left pointing at
only one of multiple copies.

Fix this by sharing a single instance of package information with all
copies of the current package's stack entry.  Keep a mutable pointer
to the current package's information only while it is still pending.
This also avoids the need to expose mutation from the package stack.

Add a test that exposes the previously-invalidated pointer to dynamic
analysis tools.

Fixes: #27730

2026-04-01 13:53:07 -04:00

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	`cmake_policy(SET CMP0074 NEW)`
	`set(Outer_ROOT ${CMAKE_CURRENT_SOURCE_DIR}/NestedConfig)`
	`find_package(Outer CONFIG)`