Added LTO and fixed warnings

makefile

@@ -4,7 +4,7 @@
 ARCH = native
 
 # Optimization level
-O = 2
+O = s
 
 # Flags for the compiler
 FLAGS  = -std=c23
@@ -17,15 +17,16 @@ endif
 FLAGS += -pedantic
 FLAGS += -Wall
 FLAGS += -Wextra
-FLAGS += -Werror
+#FLAGS += -Werror
 FLAGS += -Wconversion
 FLAGS += -Wmissing-prototypes
 FLAGS += -Wlogical-op
 FLAGS += -Wdisabled-optimization
 FLAGS += -fanalyzer
+FLAGS += -flto
 # These flags are because of the compiler otherwise giving too much warning
-FLAGS += -Wno-sign-conversion
-FLAGS += -Wformat-truncation=0
+#FLAGS += -Wno-sign-conversion
+#FLAGS += -Wformat-truncation=0
 
 # Compile flag for defining GITHASH to put at the end of the version string
 GITFLAG = -D'GITHASH=$(shell git rev-parse --short=1 HEAD)'