Source:
https://github.com/zynaddsubfx/zynaddsubfx/commit/ffe9ca1375168dd86c974dbe7c0264fce393150e
https://github.com/zynaddsubfx/zynaddsubfx/commit/730ae35c763d3e65849932f6207ed349a59a96c9

From ffe9ca1375168dd86c974dbe7c0264fce393150e Mon Sep 17 00:00:00 2001
From: Johannes Lorenz <j.git@lorenz-ho.me>
Date: Sun, 29 Dec 2024 03:22:44 +0100
Subject: [PATCH] CMake cleanup

* Raise CMake minimum version to 3.5 (due to deprecation warnings)
---
 CMakeLists.txt             |  3 +-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index e678d939c..9bae0b40d 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,9 +1,10 @@
-cmake_minimum_required(VERSION 3.0)
+cmake_minimum_required(VERSION 3.5)
 set(CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake/")
 project(zynaddsubfx)
 set(VERSION_MAJOR "3")
 set(VERSION_MINOR "0")
 set(VERSION_REVISION "6")
+cmake_policy(SET CMP0072 NEW)
 
 #Set data directory, if any
 if(DEFINED ZYN_DATADIR)

From 730ae35c763d3e65849932f6207ed349a59a96c9 Mon Sep 17 00:00:00 2001
From: Johannes Lorenz <j.git@lorenz-ho.me>
Date: Sat, 22 Feb 2025 16:46:31 +0100
Subject: [PATCH] Various CMake updates/fixes

* Raise CMake minimum version to prevent warnings
* Add missing FFTW include dirs (not used on Linux because they are
  often in default paths like `/usr/include`)
* Link against rt library only if it exists
---
 CMakeLists.txt           | 2 +-
 src/CMakeLists.txt       | 2 +-
 src/Tests/CMakeLists.txt | 5 ++++-
 3 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 9bae0b40d..451c59575 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.5)
+cmake_minimum_required(VERSION 3.10)
 set(CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake/")
 project(zynaddsubfx)
 set(VERSION_MAJOR "3")
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index c6fa46c99..9b7923f38 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -351,7 +351,7 @@ list(APPEND AUDIO_LIBRARY_DIRS ${LIBLO_LIBRARY_DIRS})
 message(STATUS "Compiling with liblo")
 
 # other include directories
-include_directories(${ZLIB_INCLUDE_DIRS} ${MXML_INCLUDE_DIRS})
+include_directories(${ZLIB_INCLUDE_DIRS} ${MXML_INCLUDE_DIRS} ${FFTW3F_INCLUDE_DIRS})
 include_directories(${CMAKE_BINARY_DIR}/src) # for zyn-version.h ...
 
 if(NOT ${X11_X11_LIB} STREQUAL "")
diff --git a/src/Tests/CMakeLists.txt b/src/Tests/CMakeLists.txt
index 2a113d2cb..f55f77a9f 100644
--- a/src/Tests/CMakeLists.txt
+++ b/src/Tests/CMakeLists.txt
@@ -71,7 +71,10 @@ if(NOT (${CMAKE_SYSTEM_NAME} STREQUAL "Windows"))
                            ${PLATFORM_LIBRARIES})
 
     add_executable(ins-test InstrumentStats.cpp)
-    target_link_libraries(ins-test ${test_lib} rt)
+    target_link_libraries(ins-test ${test_lib})
+    if(HAVE_LIBRT)
+        target_link_libraries(ins-test rt)
+    endif()
 
     if(LIBLO_FOUND)
         quick_test(PortChecker lo-server zynaddsubfx_core zynaddsubfx_nio