--- libmalloc/libmalloc-283.60.1/xcodeconfig/libmalloc.xcconfig
+++ libmalloc/libmalloc-283.100.5/xcodeconfig/libmalloc.xcconfig
@@ -86,6 +86,23 @@
 
 DYLIB_CURRENT_VERSION = $(CURRENT_PROJECT_VERSION)
 
+// #ifndef __OPEN_SOURCE__
+CR_LDFLAGS = -lCrashReporterClient
+// on architectures with OSAtomic & os_unfair_lock dyld resolvers we cannot
+// inline and need to callout to libplatform symbols rdar://problem/30155088
+OSATOMIC_PREPROCESSOR_DEFINITIONS[arch=armv7] = $(OSATOMIC_PREPROCESSOR_DEFINITIONS_NOINLINE)
+OSATOMIC_PREPROCESSOR_DEFINITIONS[arch=armv7k] = $(OSATOMIC_PREPROCESSOR_DEFINITIONS_NOINLINE)
+OSATOMIC_PREPROCESSOR_DEFINITIONS[arch=arm64] = $(OSATOMIC_PREPROCESSOR_DEFINITIONS_NOINLINE)
+ARMV81_CFLAGS = -mcpu=monsoon
+
+MALLOC_RESOLVER_SOURCE_FILE_NAMES				= resolver.c
+
+COPY_HEADERS_RUN_UNIFDEF = YES
+COPY_HEADERS_UNIFDEF_FLAGS = $(COPY_HEADERS_UNIFDEF_FLAGS_$(RC_HIDE_HARDWARE_FALL_2018_IOS))
+COPY_HEADERS_UNIFDEF_FLAGS_ = -URC_HIDE_HARDWARE_FALL_2018_IOS
+COPY_HEADERS_UNIFDEF_FLAGS_1 = -DRC_HIDE_HARDWARE_FALL_2018_IOS
+
+// #endif __OPEN_SOURCE__
 
 SUPPORTS_TEXT_BASED_API = YES
 TAPI_VERIFY_MODE = Pedantic