Fix recently introduced macOS deployment target issue

CMakeLists.txt

@@ -27,11 +27,6 @@ if(POLICY CMP0077) # Let parent project set child project options (used to skip
 endif()
 
 include("cmake/Modules/openscad_version.cmake")
-project(OpenSCAD
-  VERSION ${PROJECT_VERSION}
-  DESCRIPTION "The Programmer's Solid 3D CAD Modeler"
-  LANGUAGES C CXX
-)
 
 option(INFO "Display build configuration info at end of cmake config" ON)
 option(ENABLE_TESTS "Run testsuite after building." ON)
@@ -60,11 +55,20 @@ cmake_dependent_option(ENABLE_GAMEPAD "Enable Qt5Gamepad input driver." ON "NOT
 
 if(ENABLE_MANIFOLD)
   # Requirement from TBB 2021.8.0
-  set(CMAKE_OSX_DEPLOYMENT_TARGET "10.14" CACHE STRING "Minimum OS X deployment version")
+  set(DEPLOYMENT_TARGET "10.14")
 else()
-  set(CMAKE_OSX_DEPLOYMENT_TARGET "10.13" CACHE STRING "Minimum OS X deployment version")
+  set(DEPLOYMENT_TARGET "10.13")
 endif()
 
+# Note: CMAKE_OSX_DEPLOYMENT_TARGET must be set before the project() invocation
+set(CMAKE_OSX_DEPLOYMENT_TARGET ${DEPLOYMENT_TARGET} CACHE STRING "Minimum OS X deployment version")
+
+project(OpenSCAD
+  VERSION ${PROJECT_VERSION}
+  DESCRIPTION "The Programmer's Solid 3D CAD Modeler"
+  LANGUAGES C CXX
+)
+
 # GNUInstallDirs must be done before BuildParameters
 include(GNUInstallDirs)
 
@@ -753,6 +757,9 @@ endif()
 
 if(ENABLE_MANIFOLD)
 
+  # Hack to find our wanted version of Python before Manifold's included googletest finds Python2
+  find_package(PythonInterp 3.4 REQUIRED)
+
   if(NOT DEFINED MANIFOLD_PAR AND ENABLE_TBB)
     set(MANIFOLD_PAR TBB CACHE STRING "Parallel backend, either \"TBB\" or \"OpenMP\" or \"NONE\"" FORCE)
   endif()

cmake/Modules/info.cmake

@@ -15,6 +15,10 @@ message(STATUS "CMAKE_PREFIX_PATH:     ${CMAKE_PREFIX_PATH}")
 message(STATUS "CMAKE_CXX_COMPILER_ID: ${CMAKE_CXX_COMPILER_ID}")
 message(STATUS "CMAKE_CXX_COMPILER_VERSION: ${CMAKE_CXX_COMPILER_VERSION}")
 message(STATUS "SUFFIX:                ${SUFFIX}")
+if (APPLE)
+message(STATUS "CMAKE_OSX_DEPLOYMENT_TARGET: ${CMAKE_OSX_DEPLOYMENT_TARGET}")
+message(STATUS "CMAKE_OSX_ARCHITECTURES:     ${CMAKE_OSX_ARCHITECTURES}")
+endif()
 if (OPENSCAD_LIBRARIES)
   message(STATUS "OPENSCAD_LIBRARIES:    $ENV{OPENSCAD_LIBRARIES}")
 endif()

scripts/macosx-sanity-check.py

@@ -1,8 +1,8 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 #
 # This is used to verify that all the dependent libraries of a Mac OS X executable
-# are present and that they are backwards compatible with at least 10.13.
+# are present and that they are backwards compatible with at least 10.14.
 # Run with an executable as parameter
 # Will return 0 if the executable an all libraries are OK
 # Returns != 0 and prints some textural description on error
@@ -24,13 +24,12 @@
 import os
 import subprocess
 import re
-from distutils.version import StrictVersion
 
 DEBUG = False
 
 cxxlib = None
 
-macos_version_min = '10.13'
+macos_version_min = '10.14'
 
 def usage():
     print("Usage: " + sys.argv[0] + " <executable>", sys.stderr)
@@ -94,6 +93,9 @@ def find_dependencies(file):
             libs.append(dep)
     return libs
 
+def version_larger_than(a,b):
+    return list(map(int, a.split('.'))) > list(map(int, b.split('.')))
+
 def validate_lib(lib):
     p  = subprocess.Popen(["otool", "-l", lib], stdout=subprocess.PIPE, universal_newlines=True)
     output = p.communicate()[0]
@@ -110,7 +112,7 @@ def validate_lib(lib):
     if deploymenttarget is None:
         print("Error: Neither LC_VERSION_MIN_MACOSX nor LC_BUILD_VERSION found in " + lib)
         return False
-    if StrictVersion(deploymenttarget) > StrictVersion(macos_version_min):
+    if version_larger_than(deploymenttarget, macos_version_min):
         print("Error: Unsupported deployment target " + m.group(2) + " found: " + lib)
         return False