add logic for building macOS

Author: johnzhou721

.gitignore

@@ -12,6 +12,7 @@ support
 __pycache__
 tests/testbed/macOS
 tests/testbed/iOS
+aux
 *.log
 *.gz
 *.DS_Store

Makefile

@@ -64,7 +64,6 @@ VERSION_MIN-visionOS=2.0
 
 # The architecture of the machine doing the build
 HOST_ARCH=$(shell uname -m)
-HOST_PYTHON=$(shell which python$(PYTHON_VER))
 
 # Force the path to be minimal. This ensures that anything in the user environment
 # (in particular, homebrew and user-provided Python installs) aren't inadvertently
@@ -116,6 +115,27 @@ downloads/python-$(PYTHON_PKG_VERSION)-macos11.pkg:
 	curl $(CURL_FLAGS) -o $@ \
 		https://www.python.org/ftp/python/$(PYTHON_PKG_MICRO_VERSION)/python-$(PYTHON_PKG_VERSION)-macos11.pkg
 
+
+###########################################################################
+# Setup: Python as a Dependency
+###########################################################################
+
+# In addition, a macOS build Python for the current architecture is
+# also generated here; those won't need fancy dependencies just to
+# build another Python. We need this because sometimes, the patches
+# are so dramatic that a Python of the same MAJOR.MINOR on our system
+# is no longer applicable.
+HOST_PYTHON_INSTALL=$(PROJECT_DIR)/aux/hostpython/install
+HOST_PYTHON=$(HOST_PYTHON_INSTALL)/bin/python3.14
+HOST_PYTHON_SRCDIR=$(PROJECT_DIR)/aux/hostpython/src
+$(HOST_PYTHON): downloads/Python-$(PYTHON_VERSION).tar.gz
+	mkdir -p $(HOST_PYTHON_INSTALL)
+	mkdir -p $(HOST_PYTHON_SRCDIR)
+	tar zxf downloads/Python-$(PYTHON_VERSION).tar.gz --strip-components 1 -C $(HOST_PYTHON_SRCDIR)
+	cd $(HOST_PYTHON_SRCDIR) && ./configure --prefix="$(HOST_PYTHON_INSTALL)" \
+		| tee -a ../python-$(PYTHON_VERSION).config.log && make && make install
+
+
 ###########################################################################
 # Build for specified target (from $(TARGETS-*))
 ###########################################################################
@@ -291,7 +311,7 @@ $$(PYTHON_SRCDIR-$(target))/configure: \
 	# Touch the configure script to ensure that Make identifies it as up to date.
 	touch $$(PYTHON_SRCDIR-$(target))/configure
 
-$$(PYTHON_SRCDIR-$(target))/Makefile: \
+$$(PYTHON_SRCDIR-$(target))/Makefile: $(HOST_PYTHON) \
 		$$(PYTHON_SRCDIR-$(target))/configure
 	# Configure target Python
 	cd $$(PYTHON_SRCDIR-$(target)) && \
@@ -647,7 +667,7 @@ dist/Python-$(PYTHON_VER)-macOS-support.$(BUILD_NUMBER).tar.gz: \
 
 else
 
-$$(PYTHON_XCFRAMEWORK-$(os))/Info.plist: \
+$$(PYTHON_XCFRAMEWORK-$(os))/Info.plist: $(HOST_PYTHON) \
 		$$(foreach sdk,$$(SDKS-$(os)),$$(PYTHON_STDLIB-$$(sdk))/LICENSE.TXT)
 	@echo ">>> Create Python.XCFramework on $(os)"
 	mkdir -p $$(dir $$(PYTHON_XCFRAMEWORK-$(os)))