From 3e57d7a86fa699e8cb86276cf7f6ed0899cf50d0 Mon Sep 17 00:00:00 2001
From: Jacob Wujciak-Jens <jacob@wujciak.de>
Date: Fri, 8 Nov 2024 02:24:28 +0100
Subject: [PATCH] add comment about _head

---
 cpp/cmake_modules/FindabslAlt.cmake | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/cpp/cmake_modules/FindabslAlt.cmake b/cpp/cmake_modules/FindabslAlt.cmake
index 1c6ad16d244de..a7ebe63f5eb49 100644
--- a/cpp/cmake_modules/FindabslAlt.cmake
+++ b/cpp/cmake_modules/FindabslAlt.cmake
@@ -33,6 +33,8 @@ find_package(absl ${find_package_args})
 if(NOT DEFINED absl_VERSION)
   # Abseil does not define a version when build 'live at head'.
   # As this is their recommended path we need to define a large version to pass version checks.
+  # CMake removes the '_head' suffix for version comparison but it will show up in the logs
+  # and matches the abseil-cpp.pc version of 'head'
   set(absl_VERSION 99999999_head)
 endif()