Tweaks to fix tvOS and watchOS build and usage of libFFI.

Makefile

@@ -290,23 +290,7 @@ $$(XZ_DIR-$1)/src/liblzma/.libs/liblzma.a: $$(XZ_DIR-$1)/Makefile
 
 # No need to build libFFI on macOS
 ifneq ($2,macOS)
-
-# libFFI has it's own internal build directories for each Apple platform
-ifeq ($$(ARCH-$1),x86_64)
-LIBFFI_BUILD_DIR-$1=build_iphonesimulator-x86_64
-else ifeq ($$(ARCH-$1),i386)
-LIBFFI_BUILD_DIR-$1=build_iphonesimulator-i386
-else ifeq ($$(ARCH-$1),arm64)
-LIBFFI_BUILD_DIR-$1=build_iphoneos-arm64
-else ifeq ($$(ARCH-$1),armv7)
-LIBFFI_BUILD_DIR-$1=build_iphoneos-armv7
-else ifeq ($$(ARCH-$1),armv7k)
-LIBFFI_BUILD_DIR-$1=build_iphoneos-armv7
-else
-# This is a canary - it should never occur, so if you see it,
-# you've got a problem.
-LIBFFI_BUILD_DIR-$1=build_other
-endif
+LIBFFI_BUILD_DIR-$1=build_$$(SDK-$1)-$$(ARCH-$1)
 
 # Build LibFFI
 $$(LIBFFI_DIR-$1)/libffi.$1.a: $$(LIBFFI_DIR-$1)/darwin_common
@@ -492,15 +476,15 @@ $$(LIBFFI_DIR-$1)/darwin_common: downloads/libffi-$(LIBFFI_VERSION).tgz
 	# presumably be in libffi 3.4 or whatever comes next)
 	cd $$(LIBFFI_DIR-$1) && patch -p1 < $(PROJECT_DIR)/patch/libffi/libffi.patch
 	# Configure the build
-	cd $$(LIBFFI_DIR-$1) && python generate-darwin-source-and-headers.py --only-ios
+	cd $$(LIBFFI_DIR-$1) && python generate-darwin-source-and-headers.py --only-$(shell echo $1 | tr '[:upper:]' '[:lower:]')
 
 $$(LIBFFI_FRAMEWORK-$1): $$(LIBFFI_DIR-$1)/libffi.a
 	# Create framework directory structure
 	mkdir -p $$(LIBFFI_FRAMEWORK-$1)
 
 	# Copy the headers.
 	cp -f -r $$(LIBFFI_DIR-$1)/darwin_common/include $$(LIBFFI_FRAMEWORK-$1)/Headers
-	cp -f -r $$(LIBFFI_DIR-$1)/darwin_ios/include/* $$(LIBFFI_FRAMEWORK-$1)/Headers
+	cp -f -r $$(LIBFFI_DIR-$1)/darwin_$(shell echo $1 | tr '[:upper:]' '[:lower:]')/include/* $$(LIBFFI_FRAMEWORK-$1)/Headers
 
 	# Create the fat library
 	xcrun libtool -no_warning_for_no_symbols -static \

patch/Python/Python.patch

@@ -2681,15 +2681,30 @@ index 4aa7e6559a..511d77024c 100644
     sin(pi*x), giving accurate results for all finite x (especially x
     integral or close to an integer).  This is here for use in the
 diff --git a/Modules/posixmodule.c b/Modules/posixmodule.c
-index 12f72f525f..a2355bf93f 100644
+index 12f72f525f..ec487c6d0e 100644
 --- a/Modules/posixmodule.c
 +++ b/Modules/posixmodule.c
-@@ -56,6 +56,28 @@
+@@ -56,6 +56,8 @@
   */
  #if defined(__APPLE__)
 
 +#include "TargetConditionals.h"
 +
+ #if defined(__has_builtin) && __has_builtin(__builtin_available)
+ #  define HAVE_FSTATAT_RUNTIME __builtin_available(macOS 10.10, iOS 8.0, *)
+ #  define HAVE_FACCESSAT_RUNTIME __builtin_available(macOS 10.10, iOS 8.0, *)
+@@ -169,7 +171,6 @@
+ disguised Unix interface).  Refer to the library manual and\n\
+ corresponding Unix manual entries for more information on calls.");
+
+-
+ #ifdef HAVE_SYS_UIO_H
+ #  include <sys/uio.h>
+ #endif
+@@ -326,6 +327,26 @@
+ #  endif  /* _MSC_VER */
+ #endif  /* ! __WATCOMC__ || __QNX__ */
+
 +// iOS/tvOS/watchOS *define* a number of POSIX functions, but you can't use them
 +// because iOS isn't a conventional multiprocess environment.
 +#if TARGET_OS_IPHONE
@@ -2710,18 +2725,65 @@ index 12f72f525f..a2355bf93f 100644
 +#  undef HAVE_WAITPID
 +#endif
 +
- #if defined(__has_builtin) && __has_builtin(__builtin_available)
- #  define HAVE_FSTATAT_RUNTIME __builtin_available(macOS 10.10, iOS 8.0, *)
- #  define HAVE_FACCESSAT_RUNTIME __builtin_available(macOS 10.10, iOS 8.0, *)
-@@ -169,7 +191,6 @@
- disguised Unix interface).  Refer to the library manual and\n\
- corresponding Unix manual entries for more information on calls.");
+ _Py_IDENTIFIER(__fspath__);
 
--
- #ifdef HAVE_SYS_UIO_H
- #  include <sys/uio.h>
- #endif
-@@ -1509,7 +1530,9 @@
+ /*[clinic input]
+@@ -549,27 +570,33 @@
+         }
+     }
+ }
++#endif
+
+ void
+ PyOS_BeforeFork(void)
+ {
++#ifdef HAVE_FORK
+     run_at_forkers(_PyInterpreterState_GET()->before_forkers, 1);
+
+     _PyImport_AcquireLock();
++#endif
+ }
+
+ void
+ PyOS_AfterFork_Parent(void)
+ {
++#ifdef HAVE_FORK
+     if (_PyImport_ReleaseLock() <= 0)
+         Py_FatalError("failed releasing import lock after fork");
+
+     run_at_forkers(_PyInterpreterState_GET()->after_forkers_parent, 0);
++#endif
+ }
+
+ void
+ PyOS_AfterFork_Child(void)
+ {
++#ifdef HAVE_FORK
+     _PyRuntimeState *runtime = &_PyRuntime;
+     _PyGILState_Reinit(runtime);
+     _PyEval_ReInitThreads(runtime);
+@@ -579,8 +606,10 @@
+     _PyInterpreterState_DeleteExceptMain(runtime);
+
+     run_at_forkers(_PyInterpreterState_GET()->after_forkers_child, 0);
++#endif
+ }
+
++#ifdef HAVE_FORK
+ static int
+ register_at_forker(PyObject **lst, PyObject *func)
+ {
+@@ -600,9 +629,7 @@
+ void
+ PyOS_AfterFork(void)
+ {
+-#ifdef HAVE_FORK
+     PyOS_AfterFork_Child();
+-#endif
+ }
+
+
+@@ -1509,7 +1536,9 @@
  */
  #include <crt_externs.h>
  #elif !defined(_MSC_VER) && (!defined(__WATCOMC__) || defined(__QNX__) || defined(__VXWORKS__))
@@ -2731,23 +2793,23 @@ index 12f72f525f..a2355bf93f 100644
  #endif /* !_MSC_VER */
 
  static PyObject *
-@@ -1525,6 +1548,7 @@
+@@ -1525,6 +1554,7 @@
      d = PyDict_New();
      if (d == NULL)
          return NULL;
 +#if !TARGET_OS_TV && !TARGET_OS_WATCH
  #ifdef MS_WINDOWS
      /* _wenviron must be initialized in this way if the program is started
         through main() instead of wmain(). */
-@@ -1580,6 +1604,7 @@
+@@ -1580,6 +1610,7 @@
          Py_DECREF(k);
          Py_DECREF(v);
      }
 +#endif
      return d;
  }
 
-@@ -4739,7 +4764,12 @@
+@@ -4739,7 +4770,12 @@
      }
 
      Py_BEGIN_ALLOW_THREADS
@@ -2760,15 +2822,15 @@ index 12f72f525f..a2355bf93f 100644
      Py_END_ALLOW_THREADS
      return result;
  }
-@@ -13332,6 +13362,7 @@
+@@ -13332,6 +13368,7 @@
      int is_symlink;
      int need_stat;
  #endif
 +#if !TARGET_OS_TV && !TARGET_OS_WATCH
  #ifdef MS_WINDOWS
      unsigned long dir_bits;
  #endif
-@@ -13392,6 +13423,7 @@
+@@ -13392,6 +13429,7 @@
  #endif
 
      return result;

patch/Python/Setup.watchOS

@@ -33,4 +33,4 @@ _decimal _decimal/_decimal.c \
     _decimal/libmpdec/sixstep.c \
     _decimal/libmpdec/transpose.c \
     -I$(srcdir)/Modules/_decimal/libmpdec \
-    -DCONFIG_64=1 -DANSI=1 -DHAVE_UINT128_T=1
+    -DCONFIG_32=1 -DANSI=1