I have two targets in my Makefile, namely:

all: $(TARGET)

valgrind: $(TARGET)
    ...
    ...
    ...

The valgrind target simply runs the executable with the valgrind program. The CFLAGS for this Makefile includes:

CFLAGS += -fsanitize=address
CFLAGS += -fsanitize=undefined
CFLAGS += -fsanitize=bounds-strict
CFLAGS += -fsanitize=leak
CFLAGS += -fsanitize=null
CFLAGS += -fsanitize=signed-integer-overflow
CFLAGS += -fsanitize=bool
CFLAGS += -fsanitize=pointer-overflow
CFLAGS += -fsanitize-address-use-after-scope

CFLAGS += -fanalyzer

When doing make valgrind (assuming the target was already built), I have to first run make clean (this simply removes *.obj/ and $(TARGET), and then comment out these flags because Valgrind and sanitizers do not work together. And then uncomment them back for the next build, and so on.

How can I make the valgrind target unconditionally rebuild the target each time but with the sanitizers disabled?

The whole Makefile (with some fluff removed):

CC = gcc-13

CFLAGS += -DBENCHMARKING

CFLAGS += -O3
CFLAGS += -std=c2x
CFLAGS += -s
CFLAGS += -no-pie

CFLAGS += -fno-builtin
CFLAGS += -fno-common
CFLAGS += -fno-omit-frame-pointer

CFLAGS += -Wall
CFLAGS += -Wextra
CFLAGS += -Warray-bounds
CFLAGS += -Wconversion
CFLAGS += -Wformat-signedness
CFLAGS += -Wno-parentheses
CFLAGS += -Wpedantic
CFLAGS += -pendatic-errors
CFLAGS += -Wstrict-prototypes
CFLAGS += -Wwrite-strings
CFLAGS += -Wno-missing-braces
CFLAGS += -Wno-missing-field-initializers

CFLAGS += -fsanitize=address
CFLAGS += -fsanitize=undefined
CFLAGS += -fsanitize=bounds-strict
CFLAGS += -fsanitize=leak
CFLAGS += -fsanitize=null
CFLAGS += -fsanitize=signed-integer-overflow
CFLAGS += -fsanitize=bool
CFLAGS += -fsanitize=pointer-overflow
CFLAGS += -fsanitize-address-use-after-scope

CFLAGS += -fanalyzer

SRC_DIR = src
SRCS = $(wildcard $(SRC_DIR)/*.c)
OBJ_DIR = obj
OBJS = $(patsubst $(SRC_DIR)/%.c,$(OBJ_DIR)/%.o,$(SRCS))
DEPS = $(OBJS:.o=.d)

TARGET = read_file

all: $(TARGET)
    
$(TARGET): $(OBJ_DIR) $(OBJS)
    $(CC) $(CFLAGS) -o $@ $(OBJS)

$(OBJ_DIR):
    $(MKDIR) $(OBJ_DIR)

$(OBJ_DIR)/%.o: $(SRC_DIR)/%.c
    $(CC) $(CFLAGS) -MMD -c -o $@ $<

-include $(DEPS)

valgrind: $(TARGET)
    valgrind --tool=memcheck --leak-check=yes ./read_file --mmap_memchr read_file
    valgrind --tool=memcheck --leak-check=yes ./read_file --getline read_file
    valgrind --tool=memcheck --leak-check=yes ./read_file --mmap_getline read_file
    valgrind --tool=memcheck --leak-check=yes ./read_file --fread read_file