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# Nathan's generic Makefile -*- mode:Makefile -*-
# Copyright (C) 2019-2020 Nathan Sidwell, nathan@acm.org
# License: Apache v2.0
ifeq (0,$(MAKELEVEL))
ifneq (,@tools@)
$(info Prepending @tools@/bin to PATH)
PATH := @tools@/bin:$(PATH)
export PATH
endif
ifeq (,$(SERIAL))
# Figure out if we should set parallelism
ifeq (,$(filter clean%,$(MAKECMDGOALS)))
PARALLELISM := @NUM_CPUS@
endif
endif
endif
ifeq (00,$(MAKELEVEL)$(if $(PARALLELISM),0,1))
# Although Make 4.3 documentation suggests I can set parallelism just
# by appending to MAKEFLAGS, it doesn't seem to work. It's also not
# possible to figure out the current Make invocation's parallelism,
# the -j option doesn't appear in MAKEFLAGS and is magically inserted
# when that is expanded in a rule. I can't figure how to get a rule
# expansion into a variable to test. Fortunately, Make propagates an
# incoming -j option rather than the one you attempted to append
$(info Parallelizing $(PARALLELISM) ways)
MAKEFLAGS += -j$(PARALLELISM)
ifneq (,$(MAKECMDGOALS))
$(MAKECMDGOALS): recurse
endif
recurse:
$(MAKE) -r$(MAKEFLAGS) $(MAKECMDGOALS)
.PHONY: recurse
else
srcdir := @srcdir@
prefix := @prefix@
exec_prefix := @exec_prefix@
bindir := @bindir@
libdir := @libdir@
includedir := @includedir@
SUBDIRS := @SUBDIRS@
# autoconf doesn't seem to like setting SHELL
SHELL := $(shell which zsh 2>/dev/null >/dev/null && echo zsh \
|| (echo "No ZSH, maybe flakey" >&2 && echo sh))
# We have to place the -I paths last, so that building will see -I paths to us
CXX := $(filter-out -I%,@CXX@)
AR := @AR@
RANLIB := @RANLIB@
INSTALL := $(srcdir)/build-aux/install-sh
# C++ compiler options
CXXFLAGS := @CXXFLAGS@
CXXINC := $(filter -I%,@CXX@)
CXXOPTS := $(CXXFLAGS) @PICFLAG@
ifeq ($(notdir $(firstword $(CXX))),g++)
# It's GCC, or pretending to be it -- so it better smell like it!
# Code generation
CXXOPTS += -fno-enforce-eh-specs
CXXOPTS += -fno-stack-protector -fno-threadsafe-statics
ifneq (@EXCEPTIONS@,yes)
CXXOPTS += -fno-exceptions -fno-rtti
endif
ifeq ($(filter -fdebug-prefix-map=%,$(CXXOPTS)),)
CXXOPTS += -fdebug-prefix-map=${srcdir}/=
endif
# Warning options
CXXOPTS += -W -Wall
ifeq (no,)
# just turn off for now
CXXOPTS += -Woverloaded-virtual -Wshadow
CXXOPTS += -Wno-invalid-offsetof -Wno-unused-variable
CXXOPTS += -Wno-missing-field-initializers
# Diagnostic options, look at controlling terminal so that piping
# through more works
MLEN := $(shell stty size </dev/tty 2>/dev/null | cut -d' ' -f2)
ifneq (,$(MLEN))
CXXOPTS += -fmessage-length=$(MLEN)
endif
CXXOPTS += -fdiagnostics-color=always -fno-diagnostics-show-option
endif
else
ifeq ($(notdir $(firstword $(CXX))),clang++)
CXXOPTS += -fno-stack-protector -fno-threadsafe-statics
ifneq (@EXCEPTIONS@,yes)
CXXOPTS += -fno-exceptions -fno-rtti
endif
# Warning options
CXXOPTS += -W -Wall -Woverloaded-virtual -Wshadow
CXXOPTS += -Wno-invalid-offsetof -Wno-unused-variable
CXXOPTS += -Wno-missing-field-initializers
else
# Add different compiler's options here
endif
endif
# Config
CXXOPTS += $(filter-out -DHAVE_CONFIG_H,@DEFS@) -include config.h
# Linker options
LDFLAGS := @LDFLAGS@
LIBS := @LIBS@
# Per-source & per-directory compile flags (warning: recursive)
SRC_CXXFLAGS = $(CXXFLAGS$(patsubst $(srcdir)%,%,$1)) \
$(if $(filter-out $(srcdir)/,$1),\
$(call $0,$(dir $(patsubst %/,%,$1))))
ifneq ($(MAINTAINER),)
override MAINTAINER += $1
endif
ifeq (@MAINTAINER@,yes)
MAINTAINER = $2
else
MAINTAINER = \# --enable-maintainer-mode to rebuild $1, or make MAINTAINER=touch
endif
vpath %.in $(srcdir)
vpath %.cc $(srcdir)
.SUFFIXES: .o .cc
%.o: %.cc
@mkdir -p $(dir $@)
$(CXX) $(strip $(CXXOPTS) $(call SRC_CXXFLAGS,$<) $(CXXINC)) \
-MMD -MP -MF ${@:.o=.d} -c -o $@ $<
all:: Makefile $(addprefix all.,$(SUBDIRS))
check:: Makefile $(addprefix check.,$(SUBDIRS))
clean:: Makefile $(addprefix clean.,$(SUBDIRS))
revision.stamp: $(addprefix $(srcdir)/,. $(SUBDIRS))
@revision=$$(git -C $(srcdir) rev-parse HEAD 2>/dev/null) ;\
if test -n "$$revision" ;\
then revision=git-$$revision ;\
if git -C $(srcdir) status --porcelain 2>/dev/null | grep -vq '^ ' ;\
then revision+=M ;\
fi ;\
else revision=unknown ;\
fi ;\
echo $$revision > $@
revision: revision.stamp
@cmp -s $< $@ || cp -f $< $@
clean::
rm -f revision.stamp revision
distclean:: clean
rm -f config.log config.status
rm -rf $(SUBDIRS)
$(srcdir)/configure: $(srcdir)/configure.ac \
$(patsubst %,$(srcdir)/%/config.m4,. $(SUBDIRS))
$(call MAINTAINER,$@,cd $(@D) && autoconf -W all,error)
$(srcdir)/config.h.in: $(srcdir)/configure.ac \
$(patsubst %,$(srcdir)/%/config.m4,. $(SUBDIRS))
$(call MAINTAINER,$@,cd $(@D) && autoheader -f -W all,error)
config.h: config.status config.h.in
./$< --header=$@
touch $@
ifeq ($(filter %clean,$(MAKECMDGOALS)),)
@CONFIG_FILES@: %: config.status %.in
./$< --file=$@
touch $@
endif
config.status: $(srcdir)/configure $(srcdir)/config.h.in
if test -x $@; then ./$@ -recheck; else $< @configure_args@; fi
distclean:: clean
rm -f config.h
maintainer-clean:: distclean
rm -f $(srcdir)/config.h.in
clean::
rm -f $(shell find $(srcdir) -name '*~')
.PHONY: all check clean distclean maintainer-clean
-include $(addsuffix /Makesub,. $(SUBDIRS))
-include $(addsuffix /tests/Makesub,. $(SUBDIRS))
endif
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