UBSan conditional compilation

Makefile

@@ -2,12 +2,21 @@
 BUILDDIR := build
 ELFFILE := pepperk
 SRC := src
+
+CC_PROBLEMATIC_FLAGS:=-Wno-unused-parameter -Wno-unused-variable
+
+ifeq ($(UBSAN),true)
 SOURCES := $(shell find src -name '*.c')
+CC_PROBLEMATIC_FLAGS:= -fsanitize=undefined
+else
+SOURCES := $(shell find src -name '*.c')
+SOURCES := $(filter-out src/security/ubsan.c, $(SOURCES))
+endif
+
 OBJFILES := $(patsubst $(SRC)/%.c, $(BUILDDIR)/%.o, $(SOURCES))
 
 CC := x86_64-elf-gcc
 CC_FLAGS=-Wall -Wextra -std=gnu99 -nostdlib -ffreestanding -fstack-protector -fno-omit-frame-pointer -fno-stack-check -fno-PIC -ffunction-sections -fdata-sections -mcmodel=kernel
-CC_PROBLEMATIC_FLAGS=-Wno-unused-parameter -Wno-unused-variable -fsanitize=undefined
 
 LD := x86_64-elf-ld
 

README.md

@@ -34,6 +34,20 @@ Compile the kernel and generate an ISO image like described above, then burn the
 sudo dd if=pepper.iso of=/dev/sdX
 ```
 
+## Compilation options
+
+By default, PepperOS is compiled without the following features:
+
+```
+UBSAN - undefined behavior sanitization
+```
+
+These features can be activated by setting them to "true" at the end of the make command, for example:
+
+```
+make UBSAN=true
+```
+
 ## TODO
 
 The basics that I'm targeting are: