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CMake: Handle Dependency Checks With Newer Protobuf #6609

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merged 5 commits into from
May 15, 2024

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This fix works fine with homebrew installed protobuf on macOS v14.4.1. It, checks for the Absl cmake package in addition to protobuf which is needed by glassnt + modern macOS.

see #6607

Draft until I can check behavior on windows and linux. The Absl check might need to be a homebrew/mac-only dependency.

@mfisher31 mfisher31 changed the title CMake: macOS: Link With absl_spinlock_wait in glassnt CMake: Handle Dependency Checks With Newer Protobuf May 13, 2024
@mfisher31 mfisher31 marked this pull request as ready for review May 13, 2024 18:03
@PeterJohnson PeterJohnson merged commit b0d3bf4 into wpilibsuite:main May 15, 2024
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@mfisher31 mfisher31 deleted the macos-absl-spinloc-wait branch May 23, 2024 10:22
chauser pushed a commit to chauser/allwpilib that referenced this pull request May 30, 2024
Works around a bug on some systems where protobuf does not correctly depend on required absl libraries.
Gold856 added a commit to Gold856/allwpilib that referenced this pull request Jun 22, 2024
Gold856 added a commit to Gold856/allwpilib that referenced this pull request Jun 22, 2024
PeterJohnson pushed a commit that referenced this pull request Jun 28, 2024
Reverts #6609 since that fix didn't Just Work(tm) on Windows. (edit: or Ubuntu. Seems to have broken everything except macOS.) This PR configures CMake to try and find protobuf-config.cmake first, which allows protobuf to pull in abseil for us. If protobuf-config.cmake is not available (coprocessors which don't have a new enough protobuf installed are a common case), it will fallback to CMake's built-in FindProtobuf module, which is what we were using before.

Add wpi::CreateMessage, a wrapper with an ifdef to switch between Arena::CreateMessage and Arena::Create, since the former is deprecated in newer versions of protobuf. This allows forward compatibility with newer versions of protobuf.
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2 participants