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empserver/Make.mk
Markus Armbruster 23373d01d9 configure: Test compiler flags 
When AC_PROG_CC detects GCC, Make.mk adds a bunch of flags to CFLAGS.
Works only for flags that any version of gcc in use accepts.

Instead, make configure add the flags that actually work to CFLAGS.
This will let us add flags that work only for some compilers.

The new autoconf macros are from autoconf-archive v2015.02.24.

Unfortunately, AX_APPEND_COMPILE_FLAGS doesn't work reliably for
-Wno-*: gcc complains about unknown -Wno-foo only when other
diagnostics are being produced.  Test -Wfoo instead of -Wno-foo, and
rename to MY_APPEND_COMPILE_FLAGS.

Signed-off-by: Markus Armbruster <armbru@pond.sub.org>
2015-11-22 10:23:54 +01:00

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#
# Empire - A multi-player, client/server Internet based war game.
# Copyright (C) 1986-2015, Dave Pare, Jeff Bailey, Thomas Ruschak,
# Ken Stevens, Steve McClure, Markus Armbruster
#
# Empire is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
# ---
#
# See files README, COPYING and CREDITS in the root of the source
# tree for related information and legal notices. It is expected
# that future projects/authors will amend these files as needed.
#
# ---
#
# Make.mk: The real Makefile, included by GNUmakefile
#
# Known contributors to this file:
# Markus Armbruster, 2005-2015
#
# This makefile was inspired by `Recursive Make Considered Harmful',
# Peter Miller, 1997.
# http://miller.emu.id.au/pmiller/books/rmch/
# Recursively expanded variables are occasionally useful, but can be
# slow and tricky. Do not use them gratuitously. If you don't
# understand this, always use `:=' rather than `='.
# Default goal
all:
# Delete target on error. Every Makefile should have this.
.DELETE_ON_ERROR:
# Source files
ifeq ($(revctrl),git)
src := $(shell cd $(srcdir) && git ls-files | uniq)
else
include $(srcdir)/sources.mk
endif
dirs := $(sort $(dir $(src)))
csrc := $(filter %.c, $(src))
tsrc := $(filter %.t, $(src))
man6 := $(filter man/%.6, $(src))
builtins := $(filter src/lib/global/%.config, $(src))
# Info subjects
include $(srcdir)/info/subjects.mk
# Abbreviations
topics := $(patsubst %.t,%,$(notdir $(tsrc)))
info := $(topics) $(subjects) all TOP
scripts := $(srcdir)/src/scripts
depcomp := $(SHELL) $(srcdir)/depcomp
tarball := $(SHELL) -e $(scripts)/tarball
econfig := $(sysconfdir)/empire/econfig
schedule := $(sysconfdir)/empire/schedule
gamedir := $(localstatedir)/empire
edatadir := $(datadir)/empire
builtindir := $(edatadir)/builtin
einfodir := $(edatadir)/info.nr
ehtmldir := $(edatadir)/info.html
client/w32 := arpa/inet.h netdb.h netinet/in.h sys/time.h sys/socket.h \
sys/uio.h unistd.h w32io.c w32sockets.c w32types.h
# Abbreviate make output
# Run make with a V=1 parameter for full output.
ifneq ($(origin V),command line)
V:=
endif
# $(call quiet-command COMMAND,ABBREV) runs COMMAND, but prints only ABBREV.
# Recursively expanded so that variables in COMMAND and ABBREV work.
ifneq ($V$(findstring s,$(MAKEFLAGS)),)
quiet-command = $1
else
quiet-command = @echo $2 && $1
endif
# How to substitute Autoconf output variables
# Recursively expanded so that $@ and $< work.
subst.in = sed \
-e 's?@configure_input\@?$(notdir $@): Generated from $(notdir $<) by make.?g' \
-e 's?@builtindir\@?$(builtindir)?g' \
-e 's?@econfig\@?$(econfig)?g' \
-e 's?@einfodir\@?$(einfodir)?g' \
-e 's?@gamedir\@?$(gamedir)?g' \
-e 's/@EMPIREHOST\@/$(EMPIREHOST)/g' \
-e 's/@EMPIREPORT\@/$(EMPIREPORT)/g'
# Generated files
# See `Cleanliness' below
mk :=
ifeq ($(revctrl),git)
mk += $(srcdir)/sources.mk
endif
# Generated by Autoconf, not distributed:
ac := config.h config.log config.status info.html info.nr lib stamp-h
ac += $(basename $(filter %.in, $(src)))
ac += $(srcdir)/autom4te.cache $(srcdir)/src/client/autom4te.cache
# distributed by dist-source from $(srcdir):
acdist := aclocal.m4 config.h.in configure stamp-h.in
# distributed by dist-client from $(srcdir):
acdistcli := $(addprefix src/client/, aclocal.m4 config.h.in configure)
# Object files:
obj := $(csrc:.c=.o) $(filter %.o, $(ac:.c=.o))
# Dependencies:
deps := $(obj:.o=.d)
# Library archives:
libs := $(addprefix lib/, libcommon.a libgen.a libglobal.a)
# Programs:
util := $(addprefix src/util/, $(addsuffix $(EXEEXT), empdump empsched fairland files pconfig))
client := src/client/empire$(EXEEXT)
server := src/server/emp_server$(EXEEXT)
# Info subjects:
tsubj := $(addprefix info/, $(addsuffix .t, $(subjects)))
ttop := info/TOP.t
# Formatted info:
info.nr := $(addprefix info.nr/, $(info))
info.html := $(addprefix info.html/, $(addsuffix .html, $(info)))
info.all := $(info.nr) $(info.html) info.ps info/stamp-subj
# Tests
# sandbox
# Conditionally generated files:
empth_obj := src/lib/empthread/io.o
empth_lib :=
ifeq ($(empthread),LWP)
empth_obj += src/lib/empthread/lwp.o src/lib/empthread/posix.o
empth_lib += lib/liblwp.a
endif
ifeq ($(empthread),POSIX)
empth_obj += src/lib/empthread/pthread.o src/lib/empthread/posix.o
endif
ifeq ($(empthread),Windows)
empth_obj += src/lib/empthread/ntthread.o
endif
ifeq ($(empthread),Windows) # really: W32, regardless of thread package
libs += lib/libw32.a
$(client): lib/libw32.a
endif
# Cleanliness
# Each generated file should be in one of the following sets.
# Removed by clean:
clean := $(obj) $(deps) $(libs) $(util) $(client) $(server) $(tsubj) \
$(ttop) $(info.all) $(empth_obj) $(empth_lib) sandbox
# Removed by distclean:
distclean := $(ac) $(mk)
# Distributed by dist-source from $(srcdir):
src_distgen := $(acdist)
# Distributed by dist-client from $(srcdir)/src/client; removed by distclean:
cli_distgen := $(acdistcli)
# Compiler flags
CPPFLAGS += -I$(srcdir)/include -I.
ifeq ($(empthread),Windows) # really: W32, regardless of thread package
CPPFLAGS += -I$(srcdir)/src/lib/w32
endif
$(client): LDLIBS := $(LIBS_client)
$(server): LDLIBS := $(LIBS_server)
### Advertized goals
.PHONY: all
all: $(util) $(client) $(server) info
.PHONY: info html
info: $(info.nr)
html: $(info.html)
.PHONY: clean
clean:
$(call quiet-command,rm -rf $(clean),CLEAN)
.PHONY: distclean
distclean: clean
$(call quiet-command,rm -rf $(distclean) $(cli_distgen),DISTCLEAN)
.PHONY: install
install: all installdirs
$(INSTALL_PROGRAM) $(util) $(server) $(sbindir)
$(INSTALL_PROGRAM) $(client) $(bindir)
$(INSTALL) -m 444 $(addprefix $(srcdir)/, $(builtins)) $(builtindir)
rm -f $(einfodir)/*
$(INSTALL_DATA) $(info.nr) $(einfodir)
$(INSTALL_DATA) $(addprefix $(srcdir)/, $(man6)) $(mandir)/man6
sed -e '1,/^$$/d' -e 's/^/# /g' <$(srcdir)/doc/schedule >$(schedule).dist
echo >>$(schedule).dist
echo 'every 10 minutes' >>$(schedule).dist
[ -e $(schedule) ] || mv $(schedule).dist $(schedule)
if [ -e $(econfig) ]; then \
echo "Attempting to update your econfig"; \
if src/util/pconfig $(econfig) >$(econfig).dist; then \
if cmp -s $(econfig) $(econfig).dist; then \
echo "$(econfig) unchanged"; \
rm $(econfig).dist; \
fi; \
else \
echo "Your $(econfig) doesn't work"; \
src/util/pconfig >$(econfig).dist; \
fi; \
if [ -e $(econfig).dist ]; then \
echo "Check out $(econfig).dist"; \
fi; \
else \
src/util/pconfig >$(econfig); \
fi
.PHONY: installdirs
installdirs:
mkdir -p $(sbindir) $(bindir) $(builtindir) $(einfodir) $(mandir)/man6 $(dir $(econfig)) $(gamedir)
.PHONY: install-html
install-html: html
mkdir -p $(ehtmldir)
rm -f $(ehtmldir)/*
$(INSTALL_DATA) $(info.html) $(ehtmldir)
.PHONY: uninstall
uninstall:
rm -f $(addprefix $(sbindir)/, $(notdir $(util) $(server)))
rm -f $(addprefix $(bindir)/, $(notdir $(client)))
rm -rf $(builtindir) $(einfodir) $(ehtmldir)
rmdir $(edatadir)
rm -f $(addprefix $(mandir)/man6/, $(notdir $(man6)))
@echo "$(dir $(econfig)) and $(gamedir) not removed, you may wish to remove it manually."
.PHONY: dist
dist: dist-source dist-client dist-info
.PHONY: check check-accept _check
check check-accept: _check
check: export EMPIRE_CHECK_ACCEPT :=
check-accept: export EMPIRE_CHECK_ACCEPT := y
_check: all
@echo "Warning: test suite is immature and needs work." >&2
$(srcdir)/tests/files-test $(srcdir)
$(srcdir)/tests/fairland-test $(srcdir)
$(srcdir)/tests/info-test $(srcdir)
ifeq ($(empthread),LWP)
$(srcdir)/tests/smoke-test $(srcdir)
$(srcdir)/tests/actofgod-test $(srcdir)
$(srcdir)/tests/build-test $(srcdir)
$(srcdir)/tests/navi-march-test $(srcdir)
$(srcdir)/tests/fire-test $(srcdir)
$(srcdir)/tests/torpedo-test $(srcdir)
$(srcdir)/tests/bridgefall-test $(srcdir)
$(srcdir)/tests/retreat-test $(srcdir)
else
@echo "$(srcdir)/tests/smoke-test SKIPPED"
@echo "$(srcdir)/tests/actofgod-test SKIPPED"
@echo "$(srcdir)/tests/build-test SKIPPED"
@echo "$(srcdir)/tests/navi-march-test SKIPPED"
@echo "$(srcdir)/tests/fire-test SKIPPED"
@echo "$(srcdir)/tests/torpedo-test SKIPPED"
@echo "$(srcdir)/tests/bridgefall-test SKIPPED"
@echo "$(srcdir)/tests/retreat-test SKIPPED"
endif
$(srcdir)/tests/empdump-test $(srcdir)
### Implicit rules
# Compile with dependencies as side effect, i.e. create %.d in
# addition to %.o.
ifeq ($(how_to_dep),fast)
%.o: %.c
$(call quiet-command,$(COMPILE.c) -MT $@ -MMD -MP -MF $(@:.o=.d) \
$(OUTPUT_OPTION) $< || { rm -f $(@:.o=.d) $@; false; },CC $@)
# Why the rm? If gcc's preprocessor chokes, it leaves an empty
# dependency file behind, and doesn't touch the object file. If an
# old object file exists, and is newer than the .c file, make will
# then consider the object file up-to-date.
endif
ifeq ($(how_to_dep),depcomp)
%.o: %.c
$(call quiet-command,source='$<' object='$@' depfile='$(@:.o=.d)' \
$(CCDEPMODE) $(depcomp) $(COMPILE.c) $(OUTPUT_OPTION) $<,CC $@)
endif
# Cancel the rule to compile %.c straight to %, it interferes with
# automatic dependency generation
%: %.c
%$(EXEEXT): %.o
$(call quiet-command,$(LINK.o) $^ $(LOADLIBES) $(LDLIBS) -o $@,LINK $@)
info.nr/%: info/%.t
$(call quiet-command,$(NROFF) $(filter %.MAC, $^) $< | $(AWK) -f $(filter %/Blank.awk, $^) >$@ && test -s $@,NROFF $@)
# Pipes in make are a pain. The "test -s" catches obvious errors.
info.html/%.html: info/%.t
$(call quiet-command,perl $(srcdir)/info/emp2html.pl $(info) <$< >$@,GEN $@)
### Explicit rules
# Compilation
$(server): $(filter src/server/% src/lib/commands/% src/lib/player/% src/lib/subs/% src/lib/update/%, $(obj)) $(empth_obj) $(empth_lib) $(libs)
$(call quiet-command,$(LINK.o) $^ $(LOADLIBES) $(LDLIBS) -o $@,LINK $@)
$(client): $(filter src/client/%, $(obj)) src/lib/global/version.o
$(call quiet-command,$(LINK.o) $^ $(LOADLIBES) $(LDLIBS) -o $@,LINK $@)
$(util): $(libs)
lib/libcommon.a: $(filter src/lib/common/%, $(obj))
lib/libgen.a: $(filter src/lib/gen/%, $(obj))
lib/libglobal.a: $(filter src/lib/global/%, $(obj))
lib/liblwp.a: $(filter src/lib/lwp/%, $(obj))
lib/libw32.a: $(filter src/lib/w32/%, $(obj))
$(libs) $(empth_lib):
$(call quiet-command,$(AR) rc $@ $?,AR $@)
$(RANLIB) $@
# Info formatting
# mksubj.pl reads $(tsrc) and writes $(tsubj). A naive rule
# $(tsubj): $(tsrc)
# COMMAND
# runs COMMAND once for each target. That's because multiple targets
# in an explicit rule is just a shorthand for one rule per target,
# each with the same prerequisites and commands. Use a stamp file.
$(tsubj) info/toc: info/stamp-subj ;
info/stamp-subj: info/mksubj.pl $(tsrc)
$(call quiet-command,perl $(srcdir)/info/mksubj.pl $(subjects) $(filter %.t, $^),GEN '$(tsubj) info/toc')
>$@
$(ttop): info/mktop.pl info/subjects.mk
$(call quiet-command,perl $(srcdir)/info/mktop.pl $@ $(subjects),GEN $@)
info.nr/all: $(filter-out info.nr/all, $(info.nr))
>$@
(cd info.nr && LC_ALL=C ls -C $(info)) >>$@
info.html/all.html: info.nr/all info/ls2html.pl
expand $< | perl $(srcdir)/info/ls2html.pl >$@
$(info.nr): info/CRT.MAC info/INFO.MAC info/Blank.awk
$(info.html): info/emp2html.pl
info.ps: info/TROFF.MAC info/INFO.MAC $(ttop) $(tsubj) $(tsrc)
groff $^ >$@
# Distributing
.PHONY: dist-source
dist-source: $(src_distgen)
ifeq ($(revctrl),git)
echo "src := $(src)" >$(srcdir)/sources.mk
endif
$(tarball) $(TARNAME)-$(VERSION) -C $(srcdir) $(src_distgen) $(src) sources.mk
.PHONY: dist-client
dist-client: $(cli_distgen)
$(tarball) $(TARNAME)-client-$(VERSION) \
-C $(srcdir)/src/client \
$(notdir $(filter src/client/%, $(src)) $(cli_distgen)) \
-C $(srcdir)/include proto.h version.h \
-C $(srcdir)/src/lib/global version.c \
-C $(srcdir)/src/lib $(addprefix w32/, $(client/w32)) \
-C $(srcdir)/man empire.6 \
-C $(srcdir)/build-aux install-sh \
-C $(srcdir) COPYING INSTALL
.PHONY: dist-info
dist-info: info html
$(tarball) $(TARNAME)-info-text-$(VERSION) -C info.nr $(info)
$(tarball) $(TARNAME)-info-html-$(VERSION) -C info.html $(addsuffix .html, $(info))
# Dependencies
ifneq ($(deps),)
-include $(deps)
endif
# Automatic remake of configuration
# See (autoconf)Automatic Remaking.
# This requires sufficiently recent versions of autoconf and automake
$(srcdir)/configure: configure.ac aclocal.m4
cd $(srcdir) && autoconf
# autoheader might not change config.h.in, so touch a stamp file.
$(srcdir)/config.h.in: stamp-h.in ;
$(srcdir)/stamp-h.in: configure.ac aclocal.m4
cd $(srcdir) && autoheader
touch $@
$(srcdir)/aclocal.m4: $(filter m4/%.m4, $(src))
cd $(srcdir) && aclocal -I m4
# config.status might not change config.h; use the stamp file.
config.h: stamp-h ;
stamp-h: config.h.in config.status
./config.status config.h stamp-h
GNUmakefile: GNUmakefile.in config.status
./config.status $@
config.status: configure
./config.status --recheck
src/lib/global/path.c src/client/ipglob.c: %: %.in GNUmakefile Make.mk
$(call quiet-command,$(subst.in) <$< >$@,GEN $@)
# Make files for standalone client distribution
$(srcdir)/src/client/configure: src/client/configure.ac src/client/aclocal.m4
cd $(dir $@) && autoconf
$(srcdir)/src/client/config.h.in: src/client/configure.ac src/client/aclocal.m4
cd $(dir $@) && autoheader
touch $@
$(srcdir)/src/client/aclocal.m4: m4/ax_lib_socket_nsl.m4 m4/my_terminfo.m4 m4/my_windows_api.m4
cat $^ >$@
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