Add license to CMake files

Adding license header to the CMake files

Author: etcwilde

CMakeLists.txt

@@ -1,3 +1,14 @@
+##===----------------------------------------------------------------------===##
+##
+## This source file is part of the Swift.org open source project
+##
+## Copyright (c) 2025 Apple Inc. and the Swift project authors
+## Licensed under Apache License v2.0 with Runtime Library Exception
+##
+## See https://swift.org/LICENSE.txt for license information
+##
+##===----------------------------------------------------------------------===##
+
 cmake_minimum_required(VERSION 3.26...3.29)
 project(Subprocess LANGUAGES C Swift)
 list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake/modules")

Sources/CMakeLists.txt

@@ -1,3 +1,14 @@
+##===----------------------------------------------------------------------===##
+##
+## This source file is part of the Swift.org open source project
+##
+## Copyright (c) 2025 Apple Inc. and the Swift project authors
+## Licensed under Apache License v2.0 with Runtime Library Exception
+##
+## See https://swift.org/LICENSE.txt for license information
+##
+##===----------------------------------------------------------------------===##
+
 add_library(Subprocess)
 
 add_subdirectory(_SubprocessCShims)

Sources/Subprocess/CMakeLists.txt

@@ -1,3 +1,14 @@
+##===----------------------------------------------------------------------===##
+##
+## This source file is part of the Swift.org open source project
+##
+## Copyright (c) 2025 Apple Inc. and the Swift project authors
+## Licensed under Apache License v2.0 with Runtime Library Exception
+##
+## See https://swift.org/LICENSE.txt for license information
+##
+##===----------------------------------------------------------------------===##
+
 target_sources(Subprocess PRIVATE
   Execution.swift
   Buffer.swift

Sources/_SubprocessCShims/CMakeLists.txt

@@ -1,3 +1,14 @@
+##===----------------------------------------------------------------------===##
+##
+## This source file is part of the Swift.org open source project
+##
+## Copyright (c) 2025 Apple Inc. and the Swift project authors
+## Licensed under Apache License v2.0 with Runtime Library Exception
+##
+## See https://swift.org/LICENSE.txt for license information
+##
+##===----------------------------------------------------------------------===##
+
 target_sources(Subprocess PRIVATE process_shims.c)
 
 target_include_directories(Subprocess PRIVATE

cmake/modules/InstallExternalDependencies.cmake

@@ -1,3 +1,14 @@
+##===----------------------------------------------------------------------===##
+##
+## This source file is part of the Swift.org open source project
+##
+## Copyright (c) 2025 Apple Inc. and the Swift project authors
+## Licensed under Apache License v2.0 with Runtime Library Exception
+##
+## See https://swift.org/LICENSE.txt for license information
+##
+##===----------------------------------------------------------------------===##
+
 include_guard()
 
 # TODO: Use find_package to find a pre-built SwiftSystem