GH-36860: [C++] Report CMake error when system Protobuf exists but system gRPC doesn't exist #36904
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
Rationale for this change
We require system gRPC when system Protobuf is found to avoid underlying library (Abseil) mismatch. We should report it as an error on
cmake...
time instead of build time.What changes are included in this PR?
Always call
find_package_handle_standard_args()
to report an error for the case.Are these changes tested?
Yes.
Are there any user-facing changes?
Yes.