--- /dev/null
+++ dyld/dyld-1335/cache_builder/ExternalGenericMetadataBuilderImport.h
@@ -0,0 +1,77 @@
+/* -*- mode: C++; c-basic-offset: 4; indent-tabs-mode: nil -*-
+*
+* Copyright (c) 2024 Apple Inc. All rights reserved.
+*
+* @APPLE_LICENSE_HEADER_START@
+*
+* This file contains Original Code and/or Modifications of Original Code
+* as defined in and that are subject to the Apple Public Source License
+* Version 2.0 (the 'License'). You may not use this file except in
+* compliance with the License. Please obtain a copy of the License at
+* http://www.opensource.apple.com/apsl/ and read it before using this
+* file.
+*
+* The Original Code and all software distributed under the License are
+* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+* Please see the License for the specific language governing rights and
+* limitations under the License.
+*
+* @APPLE_LICENSE_HEADER_END@
+*/
+
+#ifndef ExternalGenericMetadataBuilderImport
+#define ExternalGenericMetadataBuilderImport
+
+#include <stdint.h>
+
+#define WEAK_IMPORT_ATTR __attribute__((weak_import))
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+struct SwiftExternalMetadataBuilder;
+struct mach_header;
+
+// Create a builder object with the given platform and architecture name.
+WEAK_IMPORT_ATTR
+struct SwiftExternalMetadataBuilder *
+swift_externalMetadataBuilder_create(int platform, const char *arch);
+
+// Destroy a builder object.
+WEAK_IMPORT_ATTR
+void swift_externalMetadataBuilder_destroy(
+    struct SwiftExternalMetadataBuilder *);
+
+// Returns an error string if the dylib could not be added
+// The builder owns the string, so the caller does not have to free it
+// The mach_header* is the raw dylib from disk/memory, before the shared cache
+// builder has created its own copy of it
+WEAK_IMPORT_ATTR
+const char *swift_externalMetadataBuilder_addDylib(
+    struct SwiftExternalMetadataBuilder *, const char *install_name,
+    const struct mach_header *, uint64_t size);
+
+WEAK_IMPORT_ATTR
+const char *swift_externalMetadataBuilder_readNamesJSON(
+    struct SwiftExternalMetadataBuilder *, const char *names_json);
+
+// Returns an error string if the dylib could not be added
+// The builder owns the string, so the caller does not have to free it
+WEAK_IMPORT_ATTR
+const char *swift_externalMetadataBuilder_buildMetadata(
+    struct SwiftExternalMetadataBuilder *);
+
+// Get the JSON for the built metadata
+WEAK_IMPORT_ATTR
+const char *swift_externalMetadataBuilder_getMetadataJSON(
+    struct SwiftExternalMetadataBuilder *);
+
+#ifdef __cplusplus
+} // extern "C"
+#endif
+
+#endif // ExternalGenericMetadataBuilderImport