X-Git-Url: https://git.lyx.org/gitweb/?a=blobdiff_plain;f=3rdparty%2Fzlib%2FCMakeLists.txt;h=e81e43af1cbf878c3deda40e425b4a679010a721;hb=9350076b3aa268919a4bf6e05c4a10caebabb913;hp=a8ca489369aaefcf5b5eda6682ea18e31567b769;hpb=7d021a938c1fb93162e4e84594b45554624007ef;p=features.git

diff --git a/3rdparty/zlib/CMakeLists.txt b/3rdparty/zlib/CMakeLists.txt
index a8ca489369..e81e43af1c 100644
--- a/3rdparty/zlib/CMakeLists.txt
+++ b/3rdparty/zlib/CMakeLists.txt
@@ -1,7 +1,14 @@
 cmake_minimum_required(VERSION 3.1)
 
+set(LYX_IPO_SUPPORTED FALSE)
 if (POLICY CMP0069)
   cmake_policy(SET CMP0069 NEW)
+  if (LYX_USE_IPO MATCHES "ON")
+    set(LYX_IPO_SUPPORTED YES)
+  endif()
+endif()
+if (POLICY CMP0075)
+  cmake_policy(SET CMP0075 NEW)
 endif()
 
 set(CMAKE_ALLOW_LOOSE_LOOP_CONSTRUCTS ON)
@@ -163,4 +170,6 @@ set(ZLIB_LIBRARY zlibstatic CACHE STRING "Zlib library" FORCE)
 set(ZLIB_INCLUDE_DIR  ${SRCDIR} CACHE STRING "Zlib include dir" FORCE)
 set(ZLIB_FOUND CACHE STRING "Zlib found" FORCE )
 
-set_target_properties(zlibstatic PROPERTIES FOLDER "3rd_party")
+set_target_properties(zlibstatic PROPERTIES
+	FOLDER "3rd_party"
+	INTERPROCEDURAL_OPTIMIZATION ${LYX_IPO_SUPPORTED})