PERF := .
MK   := Makefile

has = $(shell which $1 2>/dev/null)

# standard single make variable specified
make_clean_all      := clean all
make_python_perf_so := python/perf.so
make_debug          := DEBUG=1
make_no_libperl     := NO_LIBPERL=1
make_no_libpython   := NO_LIBPYTHON=1
make_no_scripts     := NO_LIBPYTHON=1 NO_LIBPERL=1
make_no_newt        := NO_NEWT=1
make_no_slang       := NO_SLANG=1
make_no_gtk2        := NO_GTK2=1
make_no_ui          := NO_NEWT=1 NO_SLANG=1 NO_GTK2=1
make_no_demangle    := NO_DEMANGLE=1
make_no_libelf      := NO_LIBELF=1
make_no_libunwind   := NO_LIBUNWIND=1
make_no_backtrace   := NO_BACKTRACE=1
make_no_libnuma     := NO_LIBNUMA=1
make_no_libaudit    := NO_LIBAUDIT=1
make_no_libbionic   := NO_LIBBIONIC=1
make_tags           := tags
make_cscope         := cscope
make_help           := help
make_doc            := doc
make_perf_o         := perf.o
make_util_map_o     := util/map.o
make_install        := install
make_install_bin    := install-bin
make_install_doc    := install-doc
make_install_man    := install-man
make_install_html   := install-html
make_install_info   := install-info
make_install_pdf    := install-pdf

# all the NO_* variable combined
make_minimal        := NO_LIBPERL=1 NO_LIBPYTHON=1 NO_NEWT=1 NO_GTK2=1
make_minimal        += NO_DEMANGLE=1 NO_LIBELF=1 NO_LIBUNWIND=1 NO_BACKTRACE=1
make_minimal        += NO_LIBNUMA=1 NO_LIBAUDIT=1 NO_LIBBIONIC=1

# $(run) contains all available tests
run := make_pure
run += make_clean_all
run += make_python_perf_so
run += make_debug
run += make_no_libperl
run += make_no_libpython
run += make_no_scripts
run += make_no_newt
run += make_no_slang
run += make_no_gtk2
run += make_no_ui
run += make_no_demangle
run += make_no_libelf
run += make_no_libunwind
run += make_no_backtrace
run += make_no_libnuma
run += make_no_libaudit
run += make_no_libbionic
run += make_help
run += make_doc
run += make_perf_o
run += make_util_map_o
run += make_install
run += make_install_bin
# FIXME 'install-*' commented out till they're fixed
# run += make_install_doc
# run += make_install_man
# run += make_install_html
# run += make_install_info
# run += make_install_pdf
run += make_minimal

ifneq ($(call has,ctags),)
run += make_tags
endif
ifneq ($(call has,cscope),)
run += make_cscope
endif

# $(run_O) contains same portion of $(run) tests with '_O' attached
# to distinguish O=... tests
run_O := $(addsuffix _O,$(run))

# disable some tests for O=...
run_O := $(filter-out make_python_perf_so_O,$(run_O))

# define test for each compile as 'test_NAME' variable
# with the test itself as a value
test_make_tags   = test -f tags
test_make_cscope = test -f cscope.out

test_make_tags_O   := $(test_make_tags)
test_make_cscope_O := $(test_make_cscope)

test_ok          := true
test_make_help   := $(test_ok)
test_make_doc    := $(test_ok)
test_make_help_O := $(test_ok)
test_make_doc_O  := $(test_ok)

test_make_python_perf_so := test -f $(PERF)/python/perf.so

test_make_perf_o     := test -f $(PERF)/perf.o
test_make_util_map_o := test -f $(PERF)/util/map.o

test_make_install       := test -x $$TMP_DEST/bin/perf
test_make_install_O     := $(test_make_install)
test_make_install_bin   := $(test_make_install)
test_make_install_bin_O := $(test_make_install)

# FIXME nothing gets installed
test_make_install_man    := test -f $$TMP_DEST/share/man/man1/perf.1
test_make_install_man_O  := $(test_make_install_man)

# FIXME nothing gets installed
test_make_install_doc    := $(test_ok)
test_make_install_doc_O  := $(test_ok)

# FIXME nothing gets installed
test_make_install_html   := $(test_ok)
test_make_install_html_O := $(test_ok)

# FIXME nothing gets installed
test_make_install_info   := $(test_ok)
test_make_install_info_O := $(test_ok)

# FIXME nothing gets installed
test_make_install_pdf    := $(test_ok)
test_make_install_pdf_O  := $(test_ok)

# Kbuild tests only
#test_make_python_perf_so_O := test -f $$TMP/tools/perf/python/perf.so
#test_make_perf_o_O         := test -f $$TMP/tools/perf/perf.o
#test_make_util_map_o_O     := test -f $$TMP/tools/perf/util/map.o

test_make_perf_o_O     := true
test_make_util_map_o_O := true

test_default = test -x $(PERF)/perf
test = $(if $(test_$1),$(test_$1),$(test_default))

test_default_O = test -x $$TMP_O/perf
test_O = $(if $(test_$1),$(test_$1),$(test_default_O))

all:

ifdef DEBUG
d := $(info run   $(run))
d := $(info run_O $(run_O))
endif

MAKEFLAGS := --no-print-directory

clean := @(cd $(PERF); make -s -f $(MK) clean >/dev/null)

$(run):
	$(call clean)
	@TMP_DEST=$$(mktemp -d); \
	cmd="cd $(PERF) && make -f $(MK) DESTDIR=$$TMP_DEST $($@)"; \
	echo "- $@: $$cmd" && echo $$cmd > $@ && \
	( eval $$cmd ) >> $@ 2>&1; \
	echo "  test: $(call test,$@)"; \
	$(call test,$@) && \
	rm -f $@ \
	rm -rf $$TMP_DEST

$(run_O):
	$(call clean)
	@TMP_O=$$(mktemp -d); \
	TMP_DEST=$$(mktemp -d); \
	cmd="cd $(PERF) && make -f $(MK) O=$$TMP_O DESTDIR=$$TMP_DEST $($(patsubst %_O,%,$@))"; \
	echo "- $@: $$cmd" && echo $$cmd > $@ && \
	( eval $$cmd ) >> $@ 2>&1 && \
	echo "  test: $(call test_O,$@)"; \
	$(call test_O,$@) && \
	rm -f $@ && \
	rm -rf $$TMP_O \
	rm -rf $$TMP_DEST

all: $(run) $(run_O)
	@echo OK

out: $(run_O)
	@echo OK

.PHONY: all $(run) $(run_O) clean