--- libmalloc/libmalloc-425.100.7/xcodeconfig/libmalloc.xcconfig
+++ libmalloc/libmalloc-283.60.1/xcodeconfig/libmalloc.xcconfig
@@ -24,11 +24,9 @@
 SYSTEM_HEADER_SEARCH_PATHS = $(SYSTEM_FRAMEWORK_HEADERS) $(SDKROOT)/$(SDK_INSTALL_HEADERS_ROOT)/usr/local/include $(SDKROOT)/$(SDK_INSTALL_HEADERS_ROOT)/usr/include
 SYSTEM_FRAMEWORK_SEARCH_PATHS = $(SDKROOT)/$(SDK_INSTALL_HEADERS_ROOT)/System/Library/Frameworks
 
-GCC_PREPROCESSOR_DEFINITIONS = _FORTIFY_SOURCE=0 NDEBUG $(OSATOMIC_PREPROCESSOR_DEFINITIONS) $(PLATFORM_PREPROCESSOR_DEFINITIONS) $(DRIVERKIT_PREPROCESSOR_DEFINITIONS)
+GCC_PREPROCESSOR_DEFINITIONS = _FORTIFY_SOURCE=0 NDEBUG $(OSATOMIC_PREPROCESSOR_DEFINITIONS) $(PLATFORM_PREPROCESSOR_DEFINITIONS)
 OSATOMIC_PREPROCESSOR_DEFINITIONS = OSATOMIC_USE_INLINED=1 OS_UNFAIR_LOCK_INLINE=1
 OSATOMIC_PREPROCESSOR_DEFINITIONS_NOINLINE = OSATOMIC_DEPRECATED=0 OSATOMIC_USE_INLINED=0 OS_UNFAIR_LOCK_INLINE=0
-DRIVERKIT_PREPROCESSOR_DEFINITIONS = MALLOC_TARGET_DK_OSX=0
-DRIVERKIT_PREPROCESSOR_DEFINITIONS[sdk=driverkit.macosx*] = MALLOC_TARGET_DK_OSX=1
 
 GCC_NO_COMMON_BLOCKS = YES
 ENABLE_STRICT_OBJC_MSGSEND = YES
@@ -60,7 +58,7 @@
 CLANG_WARN__DUPLICATE_METHOD_MATCH = YES
 
 // clang doesn't understand the simple_printf %y specifier
-WARNING_CFLAGS = -Wno-format-invalid-specifier -Wno-format-extra-args -Watomic-implicit-seq-cst
+WARNING_CFLAGS = -Wno-format-invalid-specifier -Wno-format-extra-args
 
 LLVM_LTO = LLVM_LTO_$(CURRENT_VARIANT)
 LLVM_LTO_normal = YES
@@ -71,25 +69,20 @@
 
 SIM_SUFFIX[sdk=*simulator*] = _sim
 LINK_WITH_STANDARD_LIBRARIES = NO
-OTHER_LDFLAGS = -all_load -L$(SDK_INSTALL_ROOT)/usr/lib/system -umbrella System $(CR_LDFLAGS) $(LIBCOMPILER_RT_LDFLAGS) $(LIBDYLD_LDFLAGS) $(LIBSYSCALL_LDFLAGS) $(LIBPLATFORM_LDFLAGS) $(PLATFORM_LDFLAGS) $(LIBPTHREAD_LDFLAGS) $(LIBFEATUREFLAGS_LDFLAGS) $(UPLINK_LDFLAGS) $(INTERPOSE_LDFLAGS) $(DIRTY_LDFLAGS)
+OTHER_LDFLAGS = -all_load -L$(SDK_INSTALL_ROOT)/usr/lib/system -umbrella System $(CR_LDFLAGS) $(LIBCOMPILER_RT_LDFLAGS) $(LIBDYLD_LDFLAGS) $(LIBSYSCALL_LDFLAGS) $(LIBPLATFORM_LDFLAGS) $(PLATFORM_LDFLAGS) $(UPLINK_LDFLAGS) $(INTERPOSE_LDFLAGS) $(DIRTY_LDFLAGS)
 LIBCOMPILER_RT_LDFLAGS = -lcompiler_rt
 LIBPLATFORM_LDFLAGS = -lsystem$(SIM_SUFFIX)_platform
 LIBSYSCALL_LDFLAGS = -lsystem$(SIM_SUFFIX)_kernel
-LIBPTHREAD_LDFLAGS = -lsystem$(SIM_SUFFIX)_pthread
 LIBDYLD_LDFLAGS = -ldyld
-
-LIBFEATUREFLAGS_LDFLAGS = -Wl,-upward-lsystem_featureflags
-LIBFEATUREFLAGS_LDFLAGS[sdk=macosx*][arch=i386] =
-LIBFEATUREFLAGS_LDFLAGS[sdk=driverkit*] =
-LIBFEATUREFLAGS_EXCLUDES =
-LIBFEATUREFLAGS_EXCLUDES[sdk=driverkit*] = libmalloc.plist
-
-EXCLUDED_SOURCE_FILE_NAMES = $(LIBFEATUREFLAGS_EXCLUDES)
 
 // TODO: Eliminate the crosslink between libmalloc and Libc (13046853)
 UPLINK_LDFLAGS = -Wl,-upward-lsystem_c
 
 INTERPOSE_LDFLAGS = -Wl,-interposable_list,$(SRCROOT)/xcodeconfig/interposable.list
+
+ORDER_FILE = $(SDKROOT)/$(APPLE_INTERNAL_DIR)/OrderFiles/$(PRODUCT_NAME).order
+ORDER_FILE[sdk=*simulator*] =
+ORDER_FILE[sdk=driverkit*] =
 
 DYLIB_CURRENT_VERSION = $(CURRENT_PROJECT_VERSION)