CC ?= cc
AR ?= ar
RANLIB ?= ranlib

CSTD   := -std=c11
WARN   := -Wall -Wextra -Wpedantic -Wshadow -Wconversion -Wstrict-prototypes -Wmissing-prototypes
DEFS   := -D_POSIX_C_SOURCE=200809L

INCS   := $(addprefix -I,$(INC_DIRS))

CFLAGS_COMMON := $(CSTD) $(WARN) $(DEFS) $(INCS)
LDFLAGS_COMMON :=
LDLIBS_COMMON  :=

ifeq ($(MODE),release)
  CFLAGS_MODE := -O2 -DNDEBUG
else ifeq ($(MODE),debug)
  CFLAGS_MODE := -O0 -g3
else ifeq ($(MODE),asan)
  CFLAGS_MODE := -O1 -g3 -fsanitize=address -fno-omit-frame-pointer
  LDFLAGS_MODE := -fsanitize=address
else ifeq ($(MODE),ubsan)
  CFLAGS_MODE := -O1 -g3 -fsanitize=undefined -fno-omit-frame-pointer
  LDFLAGS_MODE := -fsanitize=undefined
else
  $(error Unknown MODE=$(MODE))
endif

CFLAGS  := $(CFLAGS_COMMON) $(CFLAGS_MODE)
LDFLAGS := $(LDFLAGS_COMMON) $(LDFLAGS_MODE)
LDLIBS  := $(LDLIBS_COMMON)