diff -ur masscan-1.0.5/Makefile masscan-1.0.5+iPhone/Makefile
--- masscan-1.0.5/Makefile	2018-03-08 01:45:23.000000000 -1000
+++ masscan-1.0.5+iPhone/Makefile	2019-05-16 12:19:51.000000000 -1000
@@ -26,7 +26,6 @@
 LIBS = -lm 
 INCLUDES = -I.
 FLAGS2 = 
-INSTALL_DATA = -pm755
 endif
 
 # MinGW on Windows
@@ -69,7 +68,7 @@
 CC = clang
 
 DEFINES = 
-CFLAGS = -g -ggdb $(FLAGS2) $(INCLUDES) $(DEFINES) -Wall -O3
+CFLAGS = $(FLAGS2) $(INCLUDES) $(DEFINES) -Wall -O2
 .SUFFIXES: .c .cpp
 
 all: bin/masscan