termux-packages/packages/swift/swiftpm-Utilities-bootstrap

diff --git a/swiftpm/Utilities/bootstrap b/swiftpm/Utilities/bootstrap
index ead6af68..95a8427f 100755
--- a/swiftpm/Utilities/bootstrap
+++ b/swiftpm/Utilities/bootstrap
@@ -143,6 +143,9 @@ def add_build_args(parser):
         dest="cross_compile_hosts",
         help="List of cross compile hosts targets.",
         default=[])
+    parser.add_argument(
+        "--cross-compile-flags",
+        help="Swift flags to cross-compile the PackageDescription libraries")
 
 def add_test_args(parser):
     """Configures the parser with the arguments necessary for the test action."""
@@ -195,8 +198,12 @@ def parse_build_args(args):
     args.clang_path = get_clang_path(args)
     args.cmake_path = get_cmake_path(args)
     args.ninja_path = get_ninja_path(args)
-    if args.cross_compile_hosts: # Use XCBuild target directory when building for multiple arches.
-        args.target_dir = os.path.join(args.build_dir, "apple/Products")
+    if args.cross_compile_hosts:
+        if "macosx-arm64" in args.cross_compile_hosts:
+            # Use XCBuild target directory when building for multiple arches.
+            args.target_dir = os.path.join(args.build_dir, "apple/Products")
+        elif re.match('android-', args.cross_compile_hosts):
+            args.target_dir = os.path.join(args.build_dir, get_build_target(args,cross_compile=True))
     else:
         args.target_dir = os.path.join(args.build_dir, get_build_target(args))
     args.bootstrap_dir = os.path.join(args.target_dir, "bootstrap")
@@ -270,10 +277,13 @@ def get_ninja_path(args):
     else:
         return call_output(["which", "ninja"], verbose=args.verbose)
 
-def get_build_target(args):
+def get_build_target(args, cross_compile=False):
     """Returns the target-triple of the current machine."""
     try:
-        target_info_json = subprocess.check_output([args.swiftc_path, '-print-target-info'], stderr=subprocess.PIPE, universal_newlines=True).strip()
+        if cross_compile:
+            target_info_json = subprocess.check_output([args.swiftc_path, '-print-target-info'] + args.cross_compile_flags.split(), stderr=subprocess.PIPE, universal_newlines=True).strip()
+        else:
+            target_info_json = subprocess.check_output([args.swiftc_path, '-print-target-info'], stderr=subprocess.PIPE, universal_newlines=True).strip()
         args.target_info = json.loads(target_info_json)
         return args.target_info["target"]["unversionedTriple"]
     except Exception as e:
@@ -307,8 +317,11 @@ def build(args):
         build_yams(args)
         build_swift_argument_parser(args)
         build_swift_driver(args)
+        build_swiftpm_with_cmake(args)
+
+    if args.cross_compile_flags:
+        build_packagedescription_libs_with_cmake(args)
 
-    build_swiftpm_with_cmake(args)
     build_swiftpm_with_swiftpm(args,integrated_swift_driver=False)
 
 def test(args):
@@ -441,11 +454,15 @@ def install_binary(args, binary, dest_dir):
 # Build functions
 # -----------------------------------------------------------
 
-def build_with_cmake(args, cmake_args, source_path, build_dir, targets=[]):
+def build_with_cmake(args, cmake_args, source_path, build_dir, targets=[], cross_compile=False):
     """Runs CMake if needed, then builds with Ninja."""
     cache_path = os.path.join(build_dir, "CMakeCache.txt")
     if args.reconfigure or not os.path.isfile(cache_path) or not args.swiftc_path in open(cache_path).read():
-        swift_flags = ""
+        if cross_compile:
+            swift_flags = args.cross_compile_flags + " -Xcc -I@TERMUX_PREFIX@/include"
+        else:
+            swift_flags = ""
+
         if args.sysroot:
             swift_flags = "-sdk %s" % args.sysroot
 
@@ -567,29 +584,37 @@ def add_rpath_for_cmake_build(args, rpath):
     note(' '.join(add_rpath_cmd))
     subprocess.call(add_rpath_cmd, stderr=subprocess.PIPE)
 
+def build_packagedescription_libs_with_cmake(args):
+    """Builds the PackageDescription libraries using CMake."""
+    note("Building PackageDescription libraries (with CMake)")
+
+    cmake_flags = ["-DFIND_PM_DEPS:BOOL=NO"]
+    targets = ["PD4", "PD4_2"]
+    if re.match('android-', args.cross_compile_hosts):
+        cmake_flags.append("-DCMAKE_SYSTEM_NAME=Android")
+        cmake_flags.append("-DCMAKE_SYSTEM_VERSION=1")
+
+    build_with_cmake(args, cmake_flags, args.project_root, args.bootstrap_dir,
+                     targets, cross_compile=True)
+
 def build_swiftpm_with_cmake(args):
     """Builds SwiftPM using CMake."""
     note("Building SwiftPM (with CMake)")
 
-    if args.bootstrap:
-        cmake_flags = [
-            get_llbuild_cmake_arg(args),
-            "-DTSC_DIR=" + os.path.join(args.tsc_build_dir, "cmake/modules"),
-            "-DYams_DIR=" + os.path.join(args.yams_build_dir, "cmake/modules"),
-            "-DArgumentParser_DIR=" + os.path.join(args.swift_argument_parser_build_dir, "cmake/modules"),
-            "-DSwiftDriver_DIR=" + os.path.join(args.swift_driver_build_dir, "cmake/modules"),
-            "-DFIND_PM_DEPS:BOOL=YES",
-        ]
-    else:
-        cmake_flags = [ "-DFIND_PM_DEPS:BOOL=NO" ]
+    cmake_flags = [
+        get_llbuild_cmake_arg(args),
+        "-DTSC_DIR=" + os.path.join(args.tsc_build_dir, "cmake/modules"),
+        "-DYams_DIR=" + os.path.join(args.yams_build_dir, "cmake/modules"),
+        "-DArgumentParser_DIR=" + os.path.join(args.swift_argument_parser_build_dir, "cmake/modules"),
+        "-DSwiftDriver_DIR=" + os.path.join(args.swift_driver_build_dir, "cmake/modules"),
+        "-DFIND_PM_DEPS:BOOL=YES",
+    ]
 
     if platform.system() == 'Darwin':
         cmake_flags.append("-DCMAKE_C_FLAGS=-target %s%s" % (get_build_target(args), g_macos_deployment_target))
         cmake_flags.append("-DCMAKE_OSX_DEPLOYMENT_TARGET=%s" % g_macos_deployment_target)
 
-    targets = [] if args.bootstrap else ["PD4", "PD4_2"]
-
-    build_with_cmake(args, cmake_flags, args.project_root, args.bootstrap_dir, targets)
+    build_with_cmake(args, cmake_flags, args.project_root, args.bootstrap_dir)
 
     if args.llbuild_link_framework:
         add_rpath_for_cmake_build(args, args.llbuild_build_dir)
@@ -763,8 +788,10 @@ def get_swiftpm_flags(args):
         )
 
     # Don't use GNU strerror_r on Android.
-    if 'ANDROID_DATA' in os.environ:
+    if 'ANDROID_DATA' in os.environ or re.match(
+        'android-', args.cross_compile_hosts):
         build_flags.extend(["-Xswiftc", "-Xcc", "-Xswiftc", "-U_GNU_SOURCE"])
+        build_flags.extend(["-Xlinker", "-landroid-spawn"])
 
     # On ELF platforms, remove the host toolchain's stdlib absolute rpath from
     # installed executables and shared libraries.
@@ -775,6 +802,12 @@ def get_swiftpm_flags(args):
     cross_compile_hosts = args.cross_compile_hosts
     if build_target == 'x86_64-apple-macosx' and "macosx-arm64" in cross_compile_hosts:
         build_flags += ["--arch", "x86_64", "--arch", "arm64"]
+    elif cross_compile_hosts and re.match('android-', cross_compile_hosts):
+        build_flags.extend([
+            "--destination", "@TERMUX_PKG_BUILDDIR@/swiftpm-android-flags.json",
+            "-Xlinker", "-rpath", "-Xlinker", "@TERMUX_PREFIX@/lib",
+            "-Xcc", "-I@TERMUX_PREFIX@/include",
+        ])
     elif cross_compile_hosts:
         error("cannot cross-compile for %s" % cross_compile_hosts)