[Clang][MinGW] Pass --functionpadmin to the linker when -fms-hotpatch is used (#116512)

Author: cjacek

clang/lib/Driver/ToolChains/MinGW.cpp

@@ -188,6 +188,9 @@ void tools::MinGW::Linker::ConstructJob(Compilation &C, const JobAction &JA,
           << A->getSpelling() << GuardArgs;
   }
 
+  if (Args.hasArg(options::OPT_fms_hotpatch))
+    CmdArgs.push_back("--functionpadmin");
+
   CmdArgs.push_back("-o");
   const char *OutputFile = Output.getFilename();
   // GCC implicitly adds an .exe extension if it is given an output file name

clang/test/Driver/mingw.cpp

@@ -84,3 +84,7 @@
 // RUN: %clang --target=arm64ec-windows-gnu -### -o /dev/null %s 2>&1 \
 // RUN:   | FileCheck %s --check-prefix CHECK_MINGW_EC_LINK
 // CHECK_MINGW_EC_LINK: "-m" "arm64ecpe"
+
+// RUN: %clang --target=i686-windows-gnu -fms-hotpatch -### -- %s 2>&1 \
+// RUN:    | FileCheck %s --check-prefix=FUNCTIONPADMIN
+// FUNCTIONPADMIN: "--functionpadmin"