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

diff --git a/swiftpm/Utilities/bootstrap b/swiftpm/Utilities/bootstrap
index f7439427..5f284c48 100755
--- a/swiftpm/Utilities/bootstrap
+++ b/swiftpm/Utilities/bootstrap
@@ -232,7 +232,7 @@ def get_ninja_path(args):
 def get_build_target(args):
     """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()
+        target_info_json = subprocess.check_output([args.swiftc_path, '-print-target-info', '-target', '@TERMUX_ARCH@-unknown-linux-android'], 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:
@@ -255,13 +255,15 @@ def clean(args):
 
 def build(args):
     """Builds SwiftPM using a two-step process: first using CMake, then with itself."""
+    args.cross_compiling = 'ANDROID_DATA' not in os.environ
     parse_build_args(args)
 
     # Build llbuild if its build path is not passed in.
     if not args.llbuild_build_dir:
         build_llbuild(args)
 
-    build_tsc(args)
+    if not args.cross_compiling:
+        build_tsc(args)
     build_swiftpm_with_cmake(args)
     build_swiftpm_with_swiftpm(args)
 
@@ -366,7 +368,13 @@ def build_with_cmake(args, cmake_args, source_path, build_dir):
     """Runs CMake if needed, then builds with Ninja."""
     cache_path = os.path.join(build_dir, "CMakeCache.txt")
     if not os.path.isfile(cache_path) or args.reconfigure:
-        swift_flags = ""
+        if args.cross_compiling:
+            # The termux prefix flag is needed because the Swift flags pass the
+            # standalone toolchain as the sdk, ie the sysroot.
+            swift_flags = os.getenv("TERMUX_SWIFT_FLAGS") + " -Xcc -I@TERMUX_PREFIX@/include"
+        else:
+            swift_flags = ""
+
         if args.sysroot:
             swift_flags = "-sdk %s" % args.sysroot
 
@@ -390,6 +398,10 @@ def build_with_cmake(args, cmake_args, source_path, build_dir):
     if args.verbose:
         ninja_cmd.append("-v")
 
+    if args.cross_compiling:
+        ninja_cmd.append("PD4")
+        ninja_cmd.append("PD4_2")
+
     call(ninja_cmd, cwd=build_dir, verbose=args.verbose)
 
 def build_llbuild(args):
@@ -432,9 +444,11 @@ def build_swiftpm_with_cmake(args):
 
     cmake_flags = [
         get_llbuild_cmake_arg(args),
-        "-DTSC_DIR=" + os.path.join(args.tsc_build_dir, "cmake/modules"),
     ]
 
+    if not args.cross_compiling:
+        cmake_flags.append("-DTSC_DIR=" + os.path.join(args.tsc_build_dir, "cmake/modules"))
+
     if platform.system() == 'Darwin':
         cmake_flags.append("-DCMAKE_C_FLAGS=-target x86_64-apple-macosx10.10")
         cmake_flags.append("-DCMAKE_OSX_DEPLOYMENT_TARGET=10.10")
@@ -451,12 +465,17 @@ def build_swiftpm_with_swiftpm(args):
     """Builds SwiftPM using the version of SwiftPM built with CMake."""
     note("Building SwiftPM (with swift-build)")
 
-    call_swiftpm(args, [
-        "SWIFT_EXEC=" + args.swiftc_path,
-        "SWIFTPM_PD_LIBS=" + os.path.join(args.bootstrap_dir, "pm"),
-        os.path.join(args.bootstrap_dir, "bin/swift-build"),
-        "--disable-sandbox",
-    ])
+    swiftpm_args = [ "SWIFT_EXEC=" + args.swiftc_path ]
+
+    if args.cross_compiling:
+        swiftpm_args.append(os.path.join(os.path.split(args.swiftc_path)[0] + "/swift-build"))
+    else:
+        swiftpm_args.append("SWIFTPM_PD_LIBS=" + os.path.join(args.bootstrap_dir, "pm"))
+        swiftpm_args.append(os.path.join(args.bootstrap_dir, "bin/swift-build"))
+
+    swiftpm_args.append("--disable-sandbox")
+
+    call_swiftpm(args, swiftpm_args)
 
     # Setup symlinks that'll allow using swiftpm from the build directory.
     symlink_force(args.swiftc_path, os.path.join(args.target_dir, args.conf, "swiftc"))
@@ -510,15 +529,16 @@ def get_swiftpm_env_cmd(args):
         env_cmd.append("SWIFTPM_LLBUILD_FWK=1")
     env_cmd.append("SWIFTCI_USE_LOCAL_DEPS=1")
 
-    libs_joined = ":".join([
-        os.path.join(args.bootstrap_dir, "lib"),
-        os.path.join(args.tsc_build_dir, "lib"),
-        os.path.join(args.llbuild_build_dir, "lib"),
-    ])
+    if not args.cross_compiling:
+        libs_joined = ":".join([
+            os.path.join(args.bootstrap_dir, "lib"),
+            os.path.join(args.tsc_build_dir, "lib"),
+            os.path.join(args.llbuild_build_dir, "lib"),
+        ])
 
     if platform.system() == 'Darwin':
         env_cmd.append("DYLD_LIBRARY_PATH=%s" % libs_joined)
-    else:
+    elif not args.cross_compiling:
         env_cmd.append("LD_LIBRARY_PATH=%s" % libs_joined)
 
     return env_cmd
@@ -531,6 +551,13 @@ def get_swiftpm_flags(args):
         "--build-path", args.build_dir,
     ]
 
+    if args.cross_compiling:
+        build_flags.extend([
+            "--destination", "@TERMUX_PKG_BUILDDIR@/swiftpm-android-flags.json",
+            "-Xlinker", "-rpath", "-Xlinker", "@TERMUX_PREFIX@/lib",
+            "-Xcc", "-I@TERMUX_PREFIX@/include",
+        ])
+
     if args.release:
         build_flags.extend([
             "--configuration", "release",
@@ -571,8 +598,10 @@ def get_swiftpm_flags(args):
             error("the command `%s -print-target-info` didn't return a valid runtime library path" % args.swiftc_path)
 
     # Don't use GNU strerror_r on Android.
-    if 'ANDROID_DATA' in os.environ:
+    if 'ANDROID_DATA' in os.environ or args.cross_compiling:
         build_flags.extend(["-Xswiftc", "-Xcc", "-Xswiftc", "-U_GNU_SOURCE"])
+        build_flags.extend(["-Xswiftc", "-no-toolchain-stdlib-rpath"])
+        build_flags.extend(["-Xlinker", "-landroid-spawn"])
 
     return build_flags