CC=cc

LIBLINUXHEADERS= 
LIBLINUXDIR= 
LIBLINUXFILE=liblinux.a

BUILDDIR=../build
TESTDIR=tests

OLIBCCFILES=$(wildcard *.c)
OLIBCOFILES=$(patsubst %.c, $(BUILDDIR)/%.o, $(OLIBCCFILES))
EXAMPLESCFILES=$(wildcard examples/*.c)
EXAMPLESOFILES=$(patsubst %.c, $(BUILDDIR)/%.o, $(EXAMPLESCFILES))
TESTCFILES=$(wildcard $(TESTDIR)/stdio/*.c $(TESTDIR)/string/*.c)
TESTOFILES=$(patsubst %.c, $(BUILDDIR)/%.o, $(TESTCFILES))

LIBFILE=$(BUILDDIR)/olibc.a

DEBUGFLAGS=-fsanitize=address -fsanitize=leak -fsanitize=undefined -fsanitize=pointer-compare -lasan
DEBUGFLAGS=-g
INCLUDEFLAGS=-I$(LIBLINUXHEADERS) -Iinclude
LIBFLAGS=-l:olibc.a
LINKFLAGS=-L$(LIBLINUXDIR) -L$(BUILDDIR) -l:$(LIBLINUXFILE)
CFLAGS=--std=c11 -ffreestanding -fno-stack-protector -nostdlib -pedantic -Wall -Wextra $(INCLUDEFLAGS) 

.PHONY: all lib examples test clean
.SUFFIXES: .o .c

all: lib 

$(BUILDDIR)/%.o: %.c
	@mkdir -p $(@D)
	$(CC) $< $(CFLAGS) -o $@ $(LINKFLAGS) $(DEBUGFLAGS)

$(OLIBCOFILES): CFLAGS += -c
$(OLIBCOFILES): $(OLIBCCFILES)

$(LIBFILE): $(OLIBCOFILES)
	ar ruv $@ $(OLIBCOFILES)
	ranlib $@

lib: $(LIBFILE)

$(EXAMPLESOFILES): LINKFLAGS:=$(LIBFLAGS) $(LINKFLAGS)
$(EXAMPLESOFILES): $(EXAMPLESCFILES)

examples: lib $(EXAMPLESOFILES)

$(TESTOFILES): LINKFLAGS:=$(LIBFLAGS) $(LINKFLAGS)
$(TESTOFILES): $(TESTCFILES)

test: lib $(TESTOFILES)
	$(TESTDIR)/test.sh string
	$(TESTDIR)/test.sh stdio

clean:
	rm -rf $(BUILDDIR)