[CMake] Get _RegexParser building

This is a first pass at getting the _RegexParser library building.

Author: etcwilde

Runtimes/Supplemental/StringProcessing/CMakeLists.txt

@@ -0,0 +1,28 @@
+cmake_minimum_required(VERSION 3.29)
+
+set(CMAKE_POSITION_INDEPENDENT_CODE YES)
+
+if($ENV{BUILD_NUMBER})
+  math(EXPR BUILD_NUMBER "$ENV{BUILD_NUMBER} % 65535")
+  set(BUILD_NUMBER ".${BUILD_NUMBER}")
+endif()
+project(SwiftStringProcessing
+  LANGUAGES Swift C
+  VERSION 6.1.0${BUILD_NUMBER})
+
+if(NOT PROJECT_IS_TOP_LEVEL)
+  message(FATAL_ERROR "Swift StringProcessing must build as a standalone project")
+endif()
+
+set(${PROJECT_NAME}_SWIFTC_SOURCE_DIR
+  "${PROJECT_SOURCE_DIR}/../../../"
+  CACHE FILEPATH "Path to the root source directory of the Swift compiler")
+
+find_package(SwiftCore)
+
+add_compile_options(
+  $<$<COMPILE_LANGUAGE:Swift>:-explicit-module-build>
+  $<$<COMPILE_LANGUAGE:Swift>:-nostdlibimport>
+  "$<$<COMPILE_LANGUAGE:Swift>:SHELL:-Xfrontend -disable-implicit-string-processing-module-import>")
+
+add_subdirectory(_RegexParser)

Runtimes/Supplemental/StringProcessing/_RegexParser/CMakeLists.txt

@@ -0,0 +1,37 @@
+add_library(swift_RegexParser
+  Regex/TreeProtocols.swift
+  Regex/Parse/DelimiterLexing.swift
+  Regex/Parse/Source.swift
+  Regex/Parse/CharacterPropertyClassification.swift
+  Regex/Parse/LexicalAnalysis.swift
+  Regex/Parse/SyntaxOptions.swift
+  Regex/Parse/CaptureList.swift
+  Regex/Parse/CompilerInterface.swift
+  Regex/Parse/CaptureStructure.swift
+  Regex/Parse/Parse.swift
+  Regex/Parse/SourceLocation.swift
+  Regex/Parse/Diagnostics.swift
+  Regex/Parse/Sema.swift
+  Regex/Printing/RenderRanges.swift
+  Regex/Printing/PrettyPrinter.swift
+  Regex/Printing/PrintAsCanonical.swift
+  Regex/Printing/DumpAST.swift
+  Regex/AST/ASTAction.swift
+  Regex/AST/AST.swift
+  Regex/AST/CustomCharClass.swift
+  Regex/AST/Quantification.swift
+  Regex/AST/Conditional.swift
+  Regex/AST/MatchingOptions.swift
+  Regex/AST/ASTProtocols.swift
+  Regex/AST/Group.swift
+  Regex/AST/Atom.swift
+  Utility/TypeConstruction.swift
+  Utility/Misc.swift
+  Utility/AllScalars.swift
+  Utility/Errors.swift
+  Utility/MissingUnicode.swift)
+
+target_link_libraries(swift_RegexParser PRIVATE swiftCore)
+
+set_target_properties(swift_RegexParser PROPERTIES
+  Swift_MODULE_NAME _RegexParser)