cpp2rust driver: run runstfmt on our fixed stable version

Author: nunoplopes

cpp2rust/CMakeLists.txt

@@ -24,6 +24,7 @@ target_compile_definitions(cpp2rust_core PUBLIC "-DCLANG_C_COMPILER=\"${CMAKE_C_
 target_compile_definitions(cpp2rust_core PUBLIC "-DCLANG_CXX_COMPILER=\"${CMAKE_CXX_COMPILER}\"")
 target_compile_definitions(cpp2rust_core PUBLIC "-DCLANG_RESOURCE_DIR=\"${LLVM_LIBRARY_DIR}/clang/${LLVM_VERSION_MAJOR}\"")
 target_compile_definitions(cpp2rust_core PUBLIC "-DCOMPAT_INCLUDE_DIR=\"${CMAKE_CURRENT_SOURCE_DIR}/compat\"")
+target_compile_definitions(cpp2rust_core PUBLIC "-DRUST_STABLE_VERSION=\"${RUST_STABLE_VERSION}\"")
 
 if (APPLE)
   execute_process(

cpp2rust/cpp2rust.cpp

@@ -190,7 +190,8 @@ int main(int argc, char *argv[]) {
   file.close();
 
   // call rustfmt.
-  std::string rustfmt_command = "rustfmt --edition 2024 " + RsFile;
+  std::string rustfmt_command =
+      "rustfmt +" RUST_STABLE_VERSION " --edition 2024 " + RsFile;
   if (std::system(rustfmt_command.c_str()) != 0) {
     llvm::errs() << "ERROR: failed to run rustfmt\n";
     return EXIT_FAILURE;