# Makefile for impl
VERSION = @VERSION@

# Environment and values saved by the configure script
CC        = @CC@
CCOM      = @CCOM@
AR        = @AR@
RANLIB    = @RANLIB@
RM        = @RM@
INSTALL   = @INSTALL@
OPTIMISE  = @OPTIMISE@
PREFIX    = @PREFIX@
SRCDIR    = @SRCDIR@

# Find all .c files in src/ recursively
SRCS := $(shell find $(SRCDIR)/src -name '*.c' -type f)
# Generate object file names (strip SRCDIR/src/ prefix and change .c to .o)
OBJS := $(patsubst $(SRCDIR)/src/%.c,%.o,$(SRCS))

# VPATH for finding source files
VPATH = $(SRCDIR)/src:$(shell find $(SRCDIR)/src -type d 2>/dev/null | tr '\n' ':')

# Compiler flags
COPTFLAGS_gcc_debug    = -O0 -g3 -Wall -Wextra
COPTFLAGS_gcc_release  = -O2 -DNDEBUG
COPTFLAGS_clang_debug  = -O0 -g3 -Wall -Wextra
COPTFLAGS_clang_release = -O2 -DNDEBUG
COPTFLAGS = $(COPTFLAGS_$(CCOM)_$(OPTIMISE))

CSTDFLAGS_gcc   = -std=c11 -pedantic
CSTDFLAGS_clang = -std=c11 -pedantic
CSTDFLAGS = $(CSTDFLAGS_$(CCOM))

CFLAGS  = $(CSTDFLAGS) $(COPTFLAGS) -I$(SRCDIR)/include -I$(SRCDIR)/thirdparty/utest -I. -DHAVE_CONFIG_H=1
LDFLAGS = 

# Targets
BINARY = impl

.PHONY: all clean install check

all: $(BINARY)

# Create subdirectories for object files if needed
$(BINARY): $(OBJS)
	$(CC) $(CFLAGS) $(LDFLAGS) -o $@ $(OBJS)

# Suffix rule for compiling (uses VPATH to find .c files)
.SUFFIXES: .c .o

.c.o:
	@test -d $(dir $@) || mkdir -p $(dir $@)
	$(CC) $(CFLAGS) -c -o $@ $<

clean:
	$(RM) -f $(BINARY) $(OBJS)
	$(RM) -f test_main test_main.o
	find . -type f -name '*.o' -delete 2>/dev/null || true

install: $(BINARY)
	$(INSTALL) -d $(DESTDIR)$(PREFIX)/bin
	$(INSTALL) -m 755 $(BINARY) $(DESTDIR)$(PREFIX)/bin/

# Test target - links with all objects except main.o
TEST_OBJS := $(filter-out main.o,$(OBJS))

check: test_main
	./test_main

test_main: test_main.o $(TEST_OBJS)
	$(CC) $(CFLAGS) $(LDFLAGS) -o $@ $^

test_main.o: $(SRCDIR)/tests/test_main.c $(SRCDIR)/include/impl/base.h
	$(CC) $(CFLAGS) -c -o $@ $<