[FR]: `FetchContent` on `googletest` subfolder

[Cristian Le]

Does the feature exist in the most recent commit?

No

Why do we need this feature?

Avoid building with gmock

Describe the proposal.

Let's say we want to consume gtest as:

FetchContent_Declare(GTest
		GIT_REPOSITORY https://github.com/google/googletest
		GIT_TAG v1.14.0
		SOURCE_SUBDIR googletest
		FIND_PACKAGE_ARGS CONFIG
)

This fails because GOOGLETEST_VERSION is only defined in top level cmakelists. This means the that the gtest is not independently buildable

Is the feature specific to an operating system, compiler, or build system version?

Build system: CMake + FetchContent

[Derek Mauro]

Duplicate of #4309.