# Klammertext com/ Makefile
# Improved version with automatic header dependency tracking

K := $(KLAMMERTEXT_HOME)
KS := $(K)/sks
KM := $(K)/mac

include $(K)/env/makefile.env

# Commands to build
COMMANDS := kdiag kdesc ktext

# Build output directory: commands are linked directly into ../bin, so there is
# exactly one copy of each (no redundant executables in com/) and make still
# tracks them by path for incremental builds.
BINDIR := ../bin
BINCOMMANDS := $(addprefix $(BINDIR)/,$(COMMANDS))

# System install location (out-of-tree). Override on the command line, e.g.
#   make install PREFIX=/opt DESTDIR=/tmp/stage
PREFIX ?= /usr/local
DESTDIR ?=

# Shared library location
LIBDIR := ../lib
LIBRARY := $(LIBDIR)/libklammertext.so

# Linker flags for commands
COM_LDFLAGS := $(EXPORT_DYNAMIC) -Wl,-rpath,'$(ORIGIN)/../lib' -L$(LIBDIR)

# Dependency files for command sources
DEPFILES := $(addsuffix .d,$(COMMANDS))

# Compiler flags for dependency generation ($(@F) keeps the .d files in com/,
# not in the ../bin output directory).
DEPFLAGS = -MMD -MP -MF $(@F).d

.PHONY: all clean redo clang mac sks install

# Default target: build dependencies first, then commands. The commands are
# three independent links against the finished library, so they run in
# parallel (as mac/ and the sks/ components already do) rather than one after
# another -- the serial links were about a quarter of a clean rebuild.
all : | mac sks
	$(MAKE) -j commands

# Separate target to build commands (called after dependencies are ready)
.PHONY: commands
commands : $(BINCOMMANDS)

# Ensure the output directory exists before linking into it.
$(BINDIR) :
	mkdir -p $@

# Build mac/ objects
mac :
	$(MAKE) -C $(KM) -j

# Build sks/ components (depends on mac)
sks : | mac
	$(MAKE) -C $(KS)/kutil -j
	$(MAKE) -C $(KS)/target -j
	$(MAKE) -C $(KS)/document

# Explicit rules for each command - link against shared library, output to bin/
$(BINDIR)/kdiag : kdiag.cpp $(LIBRARY) | $(BINDIR)
	$(CXX) $(CPPFLAGS) $(CXXFLAGS) $(DEPFLAGS) $(COM_LDFLAGS) $(LDFLAGS) $< -o $@ -lklammertext $(LDLIBS)

$(BINDIR)/kdesc : kdesc.cpp $(LIBRARY) | $(BINDIR)
	$(CXX) $(CPPFLAGS) $(CXXFLAGS) $(DEPFLAGS) $(COM_LDFLAGS) $(LDFLAGS) $< -o $@ -lklammertext $(LDLIBS)

$(BINDIR)/ktext : ktext.cpp $(LIBRARY) | $(BINDIR)
	$(CXX) $(CPPFLAGS) $(CXXFLAGS) $(DEPFLAGS) $(COM_LDFLAGS) $(LDFLAGS) $< -o $@ -lklammertext $(LDLIBS)

# Out-of-tree system install (copies; the build tree stays intact). The
# installed commands still need KLAMMERTEXT_HOME pointing at a Klammertext tree
# for sks/ and the Python modules; their rpath finds libklammertext.so in
# $(PREFIX)/lib.
install : all
	install -d $(DESTDIR)$(PREFIX)/bin $(DESTDIR)$(PREFIX)/lib
	install -m755 $(BINCOMMANDS) $(DESTDIR)$(PREFIX)/bin
	install -m755 $(LIBRARY) $(DESTDIR)$(PREFIX)/lib

clean :
	rm -f $(BINCOMMANDS) $(DEPFILES) *~

redo :
ifneq ($(filter clang,$(MAKECMDGOALS)),)
	@:
else
	$(MAKE) -C $(KM) clean
	$(MAKE) -C $(KS)/kutil clean
	$(MAKE) -C $(KS)/target clean
	$(MAKE) -C $(KS)/document clean
	$(MAKE) clean
	$(MAKE) all
endif

# "make clang" = incremental build; "make clang redo" = full clean rebuild
clang :
	$(MAKE) $(or $(filter-out clang,$(MAKECMDGOALS)),all) COMPILER=clang

# Include generated dependency files (if they exist)
-include $(DEPFILES)