# This makefile is inspired by abuild (http://www.abuild.org), which
# was used during the development of qpdf.  The goal here is to have a
# non-recursive build with all the proper dependencies so we can start
# the build from anywhere and get the right stuff.  Each directory has
# a build.mk that is included from here and is written from this
# directory's perspective.  Each directory also has a proxy Makefile
# that allows you to start the build from any directory and get
# reasonable semantics for the all, check, and clean targets.

# Our "build items" are directories.  They are listed here such that
# no item precedes any item it depends on.  Therefore, each item can
# safely reference variables set in its predecessors.

# For each build item B, you can run make build_B, make check_B, or
# make clean_B to build, test, or clean B.  Full dependencies are
# represented across all the items, so it is possible to start
# anywhere.  From the top level, the "all", "check", and "clean"
# targets build, test, or clean everything.

# To run test suites without rebuilding, pass NO_REBUILD=1 to the
# build. This can be useful for testing binary interface compatibility
# as it enables you to rebuild libraries and rerun tests without
# relinking.

# Although this is not a GNU package and does not use automake, you
# can still run make clean to remove everything that is compiled, make
# distclean to remove everything that is generated by the end user,
# and make maintainer-clean to remove everything that is generated
# including things distributed with the source distribution.  You can
# pass CLEAN=1 to prevent this Makefile from complaining if
# ./configure has not been run.

# The install target works as usual and obeys --prefix and so forth
# passed to ./configure.  You can also pass DESTDIR=/dir to make
# install to install in a separate location.  This is useful for
# packagers.

BUILD_ITEMS := manual libqpdf qpdf zlib-flate libtests fuzz examples
OUTPUT_DIR = build
ALL_TARGETS =

.PHONY: default
default: all

CLEAN ?=
ifneq ($(CLEAN),1)
ifeq ($(words $(wildcard autoconf.mk)),0)
DUMMY := $(shell echo 1>&2)
DUMMY := $(shell echo 1>&2 Please run ./configure before running $(MAKE))
DUMMY := $(shell echo 1>&2)
$(error unable to continue with build)
endif

autoconf.mk:

include autoconf.mk

endif

# Prevent gnu make from trying to rebuild .dep files
$(foreach B,$(BUILD_ITEMS),$(eval \
  $(B)/$(OUTPUT_DIR)/%.dep: ;))

# Prevent gnu make from trying to rebuild .mk files
$(foreach B,$(BUILD_ITEMS),$(eval \
  $(B)/%.mk: ;))
%.mk: ;
make/%.mk: ;

BUILDRULES ?= libtool
include make/rules.mk

DUMMY := $(shell mkdir $(foreach B,$(BUILD_ITEMS),$(B)/$(OUTPUT_DIR)) 2>/dev/null)

include $(foreach B,$(BUILD_ITEMS),$(B)/build.mk)

ALL_TARGETS = $(foreach B,$(BUILD_ITEMS),$(TARGETS_$(B)))

TEST_ITEMS = $(foreach D,\
                 $(wildcard $(foreach B,$(BUILD_ITEMS),$(B)/qtest)),\
                 $(subst /,,$(dir $(D))))

TEST_TARGETS = $(foreach B,$(TEST_ITEMS),check_$(B))

CLEAN_TARGETS = $(foreach B,$(BUILD_ITEMS),clean_$(B))

# For test suites
export QPDF_BIN = $(abspath qpdf/$(OUTPUT_DIR)/qpdf)
export QPDF_SKIP_TEST_COMPARE_IMAGES
export QPDF_LARGE_FILE_TEST_PATH

clean:: $(CLEAN_TARGETS)
	$(RM) -r appimage/build

.PHONY: $(CLEAN_TARGETS)
$(foreach B,$(BUILD_ITEMS),$(eval \
  clean_$(B): ; \
	$(RM) -r $(B)/$(OUTPUT_DIR)))

distclean: clean
	$(RM) -r autoconf.mk autom4te.cache config.log config.status libtool
	$(RM) libqpdf/qpdf/qpdf-config.h
	$(RM) manual/html.xsl
	$(RM) manual/print.xsl
	$(RM) libqpdf.pc libqpdf.map

maintainer-clean: distclean
	$(RM) -r install-mingw* install-msvc* external-libs

.PHONY: $(TEST_TARGETS)

NO_REBUILD ?=
ifneq ($(NO_REBUILD),1)
$(foreach B,$(TEST_ITEMS),$(eval \
  check_$(B): $(TARGETS_$(B))))
endif

.PHONY: $(foreach B,$(BUILD_ITEMS),build_$(B))
$(foreach B,$(BUILD_ITEMS),$(eval \
  build_$(B): $(TARGETS_$(B))))

.PHONY: all
all: $(ALL_TARGETS) ;

check: $(TEST_TARGETS)

.PHONY: spell
# npm install -g cspell; add exceptions to cSpell.json
spell:
	cspell **/*.hh include/qpdf/*.h **/*.cc manual/* ChangeLog README* TODO

# Install targets are in the make directory in the rules-specific make
# fragments.

QTEST=$(abspath qtest/bin/qtest-driver)
$(TEST_TARGETS):
	$(call run_qtest,$(subst check_,,$@))