diff --git a/clang/include/clang/Driver/Options.td b/clang/include/clang/Driver/Options.td
--- a/clang/include/clang/Driver/Options.td
+++ b/clang/include/clang/Driver/Options.td
@@ -5609,6 +5609,10 @@
   HelpText<"Use the current working directory as the home directory of "
            "module maps specified by -fmodule-map-file=<FILE>">,
   MarshallingInfoFlag<HeaderSearchOpts<"ModuleMapFileHomeIsCwd">>;
+def fmodule_file_home_is_cwd : Flag<["-"], "fmodule-file-home-is-cwd">,
+  HelpText<"Use the current working directory as the base directory of "
+           "compiled module files.">,
+  MarshallingInfoFlag<HeaderSearchOpts<"ModuleFileHomeIsCwd">>;
 def fmodule_feature : Separate<["-"], "fmodule-feature">,
   MetaVarName<"<feature>">,
   HelpText<"Enable <feature> in module map requires declarations">,
diff --git a/clang/include/clang/Lex/HeaderSearchOptions.h b/clang/include/clang/Lex/HeaderSearchOptions.h
--- a/clang/include/clang/Lex/HeaderSearchOptions.h
+++ b/clang/include/clang/Lex/HeaderSearchOptions.h
@@ -143,6 +143,12 @@
   /// file.
   unsigned ModuleMapFileHomeIsCwd : 1;
 
+  /// Set the base path of a built module file to be the current working
+  /// directory. This is useful for sharing module files across machines
+  /// that build with different paths without having to rewrite all
+  /// modulemap files to have working directory relative paths.
+  unsigned ModuleFileHomeIsCwd : 1;
+
   /// Also search for prebuilt implicit modules in the prebuilt module cache
   /// path.
   unsigned EnablePrebuiltImplicitModules : 1;
@@ -222,9 +228,9 @@
   HeaderSearchOptions(StringRef _Sysroot = "/")
       : Sysroot(_Sysroot), ModuleFormat("raw"), DisableModuleHash(false),
         ImplicitModuleMaps(false), ModuleMapFileHomeIsCwd(false),
-        EnablePrebuiltImplicitModules(false), UseBuiltinIncludes(true),
-        UseStandardSystemIncludes(true), UseStandardCXXIncludes(true),
-        UseLibcxx(false), Verbose(false),
+        ModuleFileHomeIsCwd(false), EnablePrebuiltImplicitModules(false),
+        UseBuiltinIncludes(true), UseStandardSystemIncludes(true),
+        UseStandardCXXIncludes(true), UseLibcxx(false), Verbose(false),
         ModulesValidateOncePerBuildSession(false),
         ModulesValidateSystemHeaders(false),
         ValidateASTInputFilesContent(false), UseDebugInfo(false),
diff --git a/clang/lib/Serialization/ASTWriter.cpp b/clang/lib/Serialization/ASTWriter.cpp
--- a/clang/lib/Serialization/ASTWriter.cpp
+++ b/clang/lib/Serialization/ASTWriter.cpp
@@ -1224,15 +1224,24 @@
   }
 
   if (WritingModule && WritingModule->Directory) {
-    SmallString<128> BaseDir(WritingModule->Directory->getName());
+    SmallString<128> BaseDir;
+    if (PP.getHeaderSearchInfo().getHeaderSearchOpts().ModuleFileHomeIsCwd) {
+      // Use the current working directory as the base path for all inputs.
+      auto *CWD =
+          Context.getSourceManager().getFileManager().getDirectory(".").get();
+      BaseDir.assign(CWD->getName());
+    } else {
+      BaseDir.assign(WritingModule->Directory->getName());
+    }
     cleanPathForOutput(Context.getSourceManager().getFileManager(), BaseDir);
 
     // If the home of the module is the current working directory, then we
     // want to pick up the cwd of the build process loading the module, not
     // our cwd, when we load this module.
-    if (!PP.getHeaderSearchInfo()
-             .getHeaderSearchOpts()
-             .ModuleMapFileHomeIsCwd ||
+    if (!(PP.getHeaderSearchInfo()
+              .getHeaderSearchOpts()
+              .ModuleMapFileHomeIsCwd ||
+          PP.getHeaderSearchInfo().getHeaderSearchOpts().ModuleFileHomeIsCwd) ||
         WritingModule->Directory->getName() != StringRef(".")) {
       // Module directory.
       auto Abbrev = std::make_shared<BitCodeAbbrev>();
diff --git a/clang/test/Modules/module-file-home-is-cwd.m b/clang/test/Modules/module-file-home-is-cwd.m
new file mode 100644
--- /dev/null
+++ b/clang/test/Modules/module-file-home-is-cwd.m
@@ -0,0 +1,8 @@
+// RUN: cd %S
+// RUN: %clang_cc1 -fmodules -fno-implicit-modules -fmodule-file-home-is-cwd -fmodule-name=libA -emit-module Inputs/normal-module-map/module.map -o %t/mod.pcm
+// RUN: llvm-bcanalyzer --dump --disable-histogram %t/mod.pcm | FileCheck %s
+
+// CHECK: <INPUT_FILE {{.*}}/> blob data = 'Inputs{{/|\\}}normal-module-map{{/|\\}}a1.h'
+// CHECK: <INPUT_FILE {{.*}}/> blob data = 'Inputs{{/|\\}}normal-module-map{{/|\\}}a2.h'
+// CHECK: <INPUT_FILE {{.*}}/> blob data = 'Inputs{{/|\\}}normal-module-map{{/|\\}}module.map'
+// CHECK-NOT: MODULE_DIRECTORY