--- libmalloc/libmalloc-166.251.2/xcodeconfig/libmalloc.xcconfig
+++ libmalloc/libmalloc-140.1.1/xcodeconfig/libmalloc.xcconfig
@@ -12,7 +12,7 @@
 SYSTEM_FRAMEWORK_HEADERS = $(SDKROOT)/System/Library/Frameworks/System.framework/PrivateHeaders
 HEADER_SEARCH_PATHS = $(DERIVED_FILES_DIR)/dtrace $(SRCROOT)/include $(SYSTEM_FRAMEWORK_HEADERS) $(SDKROOT)/usr/local/include $(inherited)
 
-GCC_PREPROCESSOR_DEFINITIONS = _FORTIFY_SOURCE=0 NDEBUG $(OSATOMIC_PREPROCESSOR_DEFINITIONS) $(PLATFORM_PREPROCESSOR_DEFINITIONS)
+GCC_PREPROCESSOR_DEFINITIONS = _FORTIFY_SOURCE=0 NDEBUG $(OSATOMIC_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
 
@@ -48,16 +48,12 @@
 // clang doesn't understand the simple_printf %y specifier
 WARNING_CFLAGS = -Wno-format-invalid-specifier -Wno-format-extra-args
 
-LLVM_LTO = LLVM_LTO_$(CURRENT_VARIANT)
-LLVM_LTO_normal = YES
-LLVM_LTO_debug = NO
+LLVM_LTO = YES
 DEAD_CODE_STRIPPING = NO
-
-IS_ZIPPERED = YES
 
 SIM_SUFFIX[sdk=*simulator*] = _sim
 LINK_WITH_STANDARD_LIBRARIES = NO
-OTHER_LDFLAGS = -all_load -L/usr/lib/system -umbrella System $(CR_LDFLAGS) $(LIBCOMPILER_RT_LDFLAGS) $(LIBDYLD_LDFLAGS) $(LIBSYSCALL_LDFLAGS) $(LIBPLATFORM_LDFLAGS) $(PLATFORM_LDFLAGS) $(UPLINK_LDFLAGS) $(INTERPOSE_LDFLAGS) $(DIRTY_LDFLAGS)
+OTHER_LDFLAGS = -all_load -L/usr/lib/system -umbrella System $(CR_LDFLAGS) $(LIBCOMPILER_RT_LDFLAGS) $(LIBDYLD_LDFLAGS) $(LIBSYSCALL_LDFLAGS) $(LIBPLATFORM_LDFLAGS) $(UPLINK_LDFLAGS) $(INTERPOSE_LDFLAGS)
 LIBCOMPILER_RT_LDFLAGS = -lcompiler_rt
 LIBPLATFORM_LDFLAGS = -lsystem$(SIM_SUFFIX)_platform
 LIBSYSCALL_LDFLAGS = -lsystem$(SIM_SUFFIX)_kernel
@@ -71,8 +67,5 @@
 ORDER_FILE = $(SDKROOT)/$(APPLE_INTERNAL_DIR)/OrderFiles/$(PRODUCT_NAME).order
 ORDER_FILE[sdk=*simulator*] =
 
-DIRTY_LDFLAGS = -Wl,-dirty_data_list,$(SRCROOT)/xcodeconfig/libmalloc.dirty
-DIRTY_LDFLAGS[sdk=macosx*] =
-
 DYLIB_CURRENT_VERSION = $(CURRENT_PROJECT_VERSION)