2 files changed, 25 insertions, 16 deletions

diff --git a/contrib/llvm-project/clang/lib/Driver/ToolChains/Clang.cpp b/contrib/llvm-project/clang/lib/Driver/ToolChains/Clang.cpp
index 47ec36b3a8ff..37a07b8f224d 100644
--- a/contrib/llvm-project/clang/lib/Driver/ToolChains/Clang.cpp
+++ b/contrib/llvm-project/clang/lib/Driver/ToolChains/Clang.cpp
@@ -1152,9 +1152,6 @@ void Clang::AddPreprocessingOptions(Compilation &C, const JobAction &JA,
     if (ArgM->getOption().matches(options::OPT_M) ||
         ArgM->getOption().matches(options::OPT_MD))
       CmdArgs.push_back("-sys-header-deps");
-    if (Args.hasFlag(options::OPT_canonical_prefixes,
-                     options::OPT_no_canonical_prefixes, true))
-      CmdArgs.push_back("-canonical-system-headers");
     if ((isa<PrecompileJobAction>(JA) &&
          !Args.hasArg(options::OPT_fno_module_file_deps)) ||
         Args.hasArg(options::OPT_fmodule_file_deps))
diff --git a/contrib/llvm-project/clang/lib/Driver/ToolChains/WebAssembly.cpp b/contrib/llvm-project/clang/lib/Driver/ToolChains/WebAssembly.cpp
index 36bed3166ff3..2098a68cbc6e 100644
--- a/contrib/llvm-project/clang/lib/Driver/ToolChains/WebAssembly.cpp
+++ b/contrib/llvm-project/clang/lib/Driver/ToolChains/WebAssembly.cpp
@@ -77,31 +77,43 @@ void wasm::Linker::ConstructJob(Compilation &C, const JobAction &JA,
   Args.AddAllArgs(CmdArgs, options::OPT_u);
   ToolChain.AddFilePathLibArgs(Args, CmdArgs);
 
-  const char *Crt1 = "crt1.o";
+  bool IsCommand = true;
+  const char *Crt1;
   const char *Entry = nullptr;
 
-  // If crt1-command.o exists, it supports new-style commands, so use it.
-  // Otherwise, use the old crt1.o. This is a temporary transition measure.
-  // Once WASI libc no longer needs to support LLVM versions which lack
-  // support for new-style command, it can make crt1.o the same as
-  // crt1-command.o. And once LLVM no longer needs to support WASI libc
-  // versions before that, it can switch to using crt1-command.o.
-  if (ToolChain.GetFilePath("crt1-command.o") != "crt1-command.o")
-    Crt1 = "crt1-command.o";
+  // When -shared is specified, use the reactor exec model unless
+  // specified otherwise.
+  if (Args.hasArg(options::OPT_shared))
+    IsCommand = false;
 
   if (const Arg *A = Args.getLastArg(options::OPT_mexec_model_EQ)) {
     StringRef CM = A->getValue();
     if (CM == "command") {
-      // Use default values.
+      IsCommand = true;
     } else if (CM == "reactor") {
-      Crt1 = "crt1-reactor.o";
-      Entry = "_initialize";
+      IsCommand = false;
     } else {
       ToolChain.getDriver().Diag(diag::err_drv_invalid_argument_to_option)
           << CM << A->getOption().getName();
     }
   }
-  if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nostartfiles, options::OPT_shared))
+
+  if (IsCommand) {
+    // If crt1-command.o exists, it supports new-style commands, so use it.
+    // Otherwise, use the old crt1.o. This is a temporary transition measure.
+    // Once WASI libc no longer needs to support LLVM versions which lack
+    // support for new-style command, it can make crt1.o the same as
+    // crt1-command.o. And once LLVM no longer needs to support WASI libc
+    // versions before that, it can switch to using crt1-command.o.
+    Crt1 = "crt1.o";
+    if (ToolChain.GetFilePath("crt1-command.o") != "crt1-command.o")
+      Crt1 = "crt1-command.o";
+  } else {
+    Crt1 = "crt1-reactor.o";
+    Entry = "_initialize";
+  }
+
+  if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nostartfiles))
     CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath(Crt1)));
   if (Entry) {
     CmdArgs.push_back(Args.MakeArgString("--entry"));