From 60d565e66a76e42b4fb9c0c09aa0898e4a65d71d Mon Sep 17 00:00:00 2001
From: Sergei Golubchik <serg@mariadb.org>
Date: Thu, 4 Nov 2021 16:17:35 +0100
Subject: [PATCH] cmake: detect lz4 version, require >= 1.6

---
 cmake/FindLZ4.cmake                | 12 ++++++++++--
 plugin/provider_lz4/CMakeLists.txt |  2 +-
 2 files changed, 11 insertions(+), 3 deletions(-)

diff --git a/cmake/FindLZ4.cmake b/cmake/FindLZ4.cmake
index 48a7790afcd..eebd85969e3 100644
--- a/cmake/FindLZ4.cmake
+++ b/cmake/FindLZ4.cmake
@@ -1,9 +1,17 @@
 find_path(LZ4_INCLUDE_DIRS NAMES lz4.h)
 find_library(LZ4_LIBRARIES NAMES lz4)
 
+if(LZ4_INCLUDE_DIRS AND EXISTS "${LZ4_INCLUDE_DIRS}/lz4.h")
+  file(STRINGS "${LZ4_INCLUDE_DIRS}/lz4.h" LZ4_H REGEX "^#define LZ4_VERSION_[MR]")
+  string(REGEX REPLACE "LZ4_VERSION" "" LZ4_H "${LZ4_H}")
+  string(REGEX MATCHALL "[0-9]+" LZ4_H "${LZ4_H}")
+  string(REGEX REPLACE ";" "." LZ4_VERSION_STRING "${LZ4_H}")
+endif()
+
 include(FindPackageHandleStandardArgs)
 FIND_PACKAGE_HANDLE_STANDARD_ARGS(
-    LZ4 DEFAULT_MSG
-    LZ4_LIBRARIES LZ4_INCLUDE_DIRS)
+    LZ4
+    REQUIRED_VARS LZ4_LIBRARIES LZ4_INCLUDE_DIRS
+    VERSION_VAR LZ4_VERSION_STRING)
 
 mark_as_advanced(LZ4_INCLUDE_DIRS LZ4_LIBRARIES)
diff --git a/plugin/provider_lz4/CMakeLists.txt b/plugin/provider_lz4/CMakeLists.txt
index 9d47ab80602..514fa2cbe52 100644
--- a/plugin/provider_lz4/CMakeLists.txt
+++ b/plugin/provider_lz4/CMakeLists.txt
@@ -1,4 +1,4 @@
-FIND_PACKAGE(LZ4)
+FIND_PACKAGE(LZ4 1.6)
 
 IF (LZ4_FOUND)
   GET_PROPERTY(dirs DIRECTORY PROPERTY INCLUDE_DIRECTORIES)