From c5c60e04ddae03165dc05b7f4a53969662b28cc3 Mon Sep 17 00:00:00 2001
From: Markus Wick <markus@selfnet.de>
Date: Sat, 9 May 2020 11:11:18 +0200
Subject: Check for the zstd version

---
 externals/find-modules/Findzstd.cmake | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

(limited to 'externals')

diff --git a/externals/find-modules/Findzstd.cmake b/externals/find-modules/Findzstd.cmake
index cd0158b0c..539abbafc 100644
--- a/externals/find-modules/Findzstd.cmake
+++ b/externals/find-modules/Findzstd.cmake
@@ -11,12 +11,26 @@ find_library(zstd_LIBRARY
   PATHS ${PC_zstd_LIBRARY_DIRS}
 )
 
+if(zstd_INCLUDE_DIR)
+  file(STRINGS "${zstd_INCLUDE_DIR}/zstd.h" _zstd_version_lines
+    REGEX "#define[ \t]+ZSTD_VERSION_(MAJOR|MINOR|RELEASE)")
+  string(REGEX REPLACE ".*ZSTD_VERSION_MAJOR *\([0-9]*\).*" "\\1" _zstd_version_major "${_zstd_version_lines}")
+  string(REGEX REPLACE ".*ZSTD_VERSION_MINOR *\([0-9]*\).*" "\\1" _zstd_version_minor "${_zstd_version_lines}")
+  string(REGEX REPLACE ".*ZSTD_VERSION_RELEASE *\([0-9]*\).*" "\\1" _zstd_version_release "${_zstd_version_lines}")
+  set(zstd_VERSION "${_zstd_version_major}.${_zstd_version_minor}.${_zstd_version_release}")
+  unset(_zstd_version_major)
+  unset(_zstd_version_minor)
+  unset(_zstd_version_release)
+  unset(_zstd_version_lines)
+endif()
+
 include(FindPackageHandleStandardArgs)
 find_package_handle_standard_args(zstd
   FOUND_VAR zstd_FOUND
   REQUIRED_VARS
     zstd_LIBRARY
     zstd_INCLUDE_DIR
+    zstd_VERSION
   VERSION_VAR zstd_VERSION
 )
 
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