Merge pull request #38374 from nkcsgexi/compiler-api

libSwiftScanner: add an API to invoke compiler in process

Author: nkcsgexi

cmake/modules/AddSwift.cmake

@@ -464,7 +464,8 @@ function(add_swift_host_library name)
         SHARED
         STATIC
         OBJECT
-        PURE_SWIFT)
+        PURE_SWIFT
+        HAS_LIBSWIFT)
   set(single_parameter_options)
   set(multiple_parameter_options
         LLVM_LINK_COMPONENTS)
@@ -510,6 +511,12 @@ function(add_swift_host_library name)
 
   add_library(${name} ${libkind} ${ASHL_SOURCES})
 
+  if (ASHL_HAS_LIBSWIFT AND SWIFT_TOOLS_ENABLE_LIBSWIFT)
+    # Workaround for a linker crash related to autolinking: rdar://77839981
+    set_property(TARGET ${name} APPEND_STRING PROPERTY
+                 LINK_FLAGS " -lobjc ")
+  endif()
+
   # Respect LLVM_COMMON_DEPENDS if it is set.
   #
   # LLVM_COMMON_DEPENDS if a global variable set in ./lib that provides targets

include/swift-c/DependencyScan/DependencyScan.h

@@ -359,6 +359,9 @@ swiftscan_scanner_cache_load(swiftscan_scanner_t scanner,
 SWIFTSCAN_PUBLIC void
 swiftscan_scanner_cache_reset(swiftscan_scanner_t scanner);
 
+/// An entry point to invoke the compiler via a library call.
+SWIFTSCAN_PUBLIC int invoke_swift_compiler(int argc, const char **argv);
+
 //===----------------------------------------------------------------------===//
 
 SWIFTSCAN_END_DECLS

tools/libSwiftScan/CMakeLists.txt

@@ -9,15 +9,17 @@ set(LLVM_EXPORTED_SYMBOL_FILE
 
 add_swift_host_library(libSwiftScan SHARED
   libSwiftScan.cpp
-  c-include-check.c)
+  c-include-check.c
+  HAS_LIBSWIFT)
 
 add_dependencies(libSwiftScan
   clang
   swiftDependencyScan)
 
 target_link_libraries(libSwiftScan PRIVATE
     swiftDependencyScan
-    swiftDriverTool)
+    swiftDriverTool
+    libswift)
 
 set_target_properties(libSwiftScan
     PROPERTIES

tools/libSwiftScan/libSwiftScan.cpp

@@ -15,6 +15,7 @@
 //===----------------------------------------------------------------------===//
 
 #include "swift/Basic/LLVMInitialize.h"
+#include "swift/DriverTool/DriverTool.h"
 #include "swift/DependencyScan/DependencyScanImpl.h"
 #include "swift/DependencyScan/DependencyScanningTool.h"
 #include "swift/DependencyScan/StringUtils.h"
@@ -510,3 +511,7 @@ swiftscan_compiler_supported_features_query() {
   // TODO: We are yet to figure out how "Features" will be organized.
   return nullptr;
 }
+
+int invoke_swift_compiler(int argc, const char **argv) {
+  return swift::mainEntry(argc, argv);
+}

tools/libSwiftScan/libSwiftScan.exports

@@ -57,3 +57,4 @@ swiftscan_compiler_supported_features_query
 swiftscan_scanner_cache_serialize
 swiftscan_scanner_cache_load
 swiftscan_scanner_cache_reset
+invoke_swift_compiler