# -------------------------------------------------------------------
# ASL Capture Makefile
#
# Supports:
#   - PIPE-only build (default)
#   - PTY-enabled build (ENABLE_PTY=1)
#
# Targets:
#   make
#   make ENABLE_PTY=1
#   make install DESTDIR=...
#   make clean
# -------------------------------------------------------------------

# Toolchain
CC      ?= cc
AR      ?= ar
RANLIB  ?= ranlib
INSTALL ?= install

# Paths
PREFIX        ?= /usr
BINDIR        ?= $(PREFIX)/bin
LIBDIR        ?= $(PREFIX)/lib
INCLUDEDIR    ?= $(PREFIX)/include/asl

# Versioning (library ABI)
LIBNAME       = asl-capture
LIB_MAJOR     = 0
LIB_MINOR     = 1
LIB_PATCH     = 0

SONAME        = lib$(LIBNAME).so.$(LIB_MAJOR)
REALNAME      = lib$(LIBNAME).so.$(LIB_MAJOR).$(LIB_MINOR).$(LIB_PATCH)

# Flags
CFLAGS  ?= -O2
CFLAGS  += -Wall -Wextra -fPIC
CPPFLAGS += -I.

LDFLAGS ?=
LIBS    ?=

# Optional PTY support
ifeq ($(ENABLE_PTY),1)
CPPFLAGS += -DASL_ENABLE_PTY
LIBS     += -lutil
endif

# Sources
LIB_SRC  = asl_capture.c
LIB_OBJ  = $(LIB_SRC:.c=.o)

TOOL_SRC = asl_capture_tool.c
TOOL_OBJ = $(TOOL_SRC:.c=.o)

# Outputs
STATIC_LIB = lib$(LIBNAME).a
SHARED_LIB = $(REALNAME)
SONAME_LIB = $(SONAME)
TOOL       = asl-capture

# -------------------------------------------------------------------
# Default target
# -------------------------------------------------------------------

all: $(STATIC_LIB) $(SHARED_LIB) $(TOOL)

# -------------------------------------------------------------------
# Library builds
# -------------------------------------------------------------------

%.o: %.c
	$(CC) $(CPPFLAGS) $(CFLAGS) -c $< -o $@

$(STATIC_LIB): $(LIB_OBJ)
	$(AR) rcs $@ $^
	$(RANLIB) $@

$(SHARED_LIB): $(LIB_OBJ)
	$(CC) -shared \
	    -Wl,-soname,$(SONAME_LIB) \
	    -o $@ $^ $(LIBS)

# Symlink for soname
$(SONAME_LIB): $(SHARED_LIB)
	ln -sf $(REALNAME) $(SONAME_LIB)

# -------------------------------------------------------------------
# Tool build
# -------------------------------------------------------------------

$(TOOL): $(TOOL_OBJ) $(SHARED_LIB)
	$(CC) -o $@ $(TOOL_OBJ) \
	    -L. -l$(LIBNAME) $(LIBS)

# -------------------------------------------------------------------
# Install
# -------------------------------------------------------------------

install: all
	# Library
	$(INSTALL) -d $(DESTDIR)$(LIBDIR)
	$(INSTALL) -m 0755 $(SHARED_LIB) $(DESTDIR)$(LIBDIR)/
	ln -sf $(REALNAME) $(DESTDIR)$(LIBDIR)/$(SONAME_LIB)
	ln -sf $(SONAME_LIB) $(DESTDIR)$(LIBDIR)/lib$(LIBNAME).so

	# Static lib
	$(INSTALL) -m 0644 $(STATIC_LIB) $(DESTDIR)$(LIBDIR)/

	# Headers
	$(INSTALL) -d $(DESTDIR)$(INCLUDEDIR)
	$(INSTALL) -m 0644 asl_capture.h $(DESTDIR)$(INCLUDEDIR)/

	# Tool
	$(INSTALL) -d $(DESTDIR)$(BINDIR)
	$(INSTALL) -m 0755 $(TOOL) $(DESTDIR)$(BINDIR)/

# -------------------------------------------------------------------
# Clean
# -------------------------------------------------------------------

clean:
	rm -f *.o *.a *.so* $(TOOL)

.PHONY: all install clean