X-Git-Url: http://git.tuebingen.mpg.de/?p=lopsub.git;a=blobdiff_plain;f=Makefile;h=548c96ff0e6298e29d8f247940a4f446e6757d35;hp=d610c54aeab588eafdf6188481455b73b9c1c46c;hb=HEAD;hpb=f35b70fc3e8656f71437cc85062da31488acd781

diff --git a/Makefile b/Makefile
index d610c54..89cbc2e 100644
--- a/Makefile
+++ b/Makefile
@@ -9,6 +9,13 @@ endif
 .ONESHELL:
 .SHELLFLAGS := -ec
 
+# Recipes which redirect stdout to the target of the rule (i.e., constructs
+# like cmd > $@) create empty or incomplete output files if the command fails,
+# for example when cmd was not found. Since the target exists and is uptodate
+# in this case, this may lead to all sorts of problems. The following target
+# makes sure that such files are removed.
+.DELETE_ON_ERROR:
+
 PREFIX ?= /usr/local
 M4 := m4
 LN := ln -f
@@ -18,14 +25,38 @@ AR := ar
 GROFF := groff
 CP := cp
 INSTALL := install
-GZIP := gzip -f9
+GZIP := gzip -fn9
 ZCAT := zcat
 
-DATE := $(shell date '+%B %Y')
+CC += -ffile-prefix-map=$(CURDIR)=.
+
+dummy != $(M4) /dev/null || printf 'failed'
+ifeq ($(dummy), failed)
+$(error m4 is required to build this package)
+endif
+dummy != printf '%%%%\n' | $(LEX) -o /dev/null || printf 'failed'
+ifeq ($(dummy), failed)
+$(error (f)lex is required to build this package)
+endif
+
+DATE_FMT := +%B %Y
+# To get a reproducible build, we use $(SOURCE_DATE_EPOCH) instead of the
+# current time if this variable is set.
+ifdef SOURCE_DATE_EPOCH
+	DATE := $(shell LC_ALL=C date -u -d '@$(SOURCE_DATE_EPOCH)' \
+		'$(DATE_FMT)' 2>/dev/null || LC_ALL=C date -u '$(DATE_FMT)')
+else
+	DATE := $(shell date '$(DATE_FMT)')
+endif
 GIT_VERSION := $(shell ./version-gen.sh)
+PLAIN_VERSION := $(firstword $(subst -, , $(GIT_VERSION)))
+MAJOR_VERSION := $(firstword $(subst ., , $(PLAIN_VERSION)))
+SONAME := liblopsub.so.$(MAJOR_VERSION)
+REALNAME := liblopsub.so.$(PLAIN_VERSION)
+LINKERNAME:=liblopsub.so
 
 m4_man_pages := lopsub-suite.5.gz lopsub.7.gz
-all := $(m4_man_pages) liblopsub.a lopsubgen lopsubgen.1.gz \
+all := $(m4_man_pages) $(REALNAME) lopsubgen lopsubgen.1.gz \
 	lopsubex lopsubex.1.gz
 all: $(all)
 
@@ -64,57 +95,63 @@ lopsubgen.lsg.c lopsubgen.lsg.h: lopsubgen.suite lopsubgen-stage1 \
 lsg1_objs := lopsubgen.o lsg1.o version.o
 lsg_objs := lopsubgen.o lsg.o lopsubgen.lsg.o lopsub.o version.o
 liblopsub_objs := config_file.o lopsub.o version.o
-lopsubex_objs := lopsubex.o lopsubex.lsg.o version.o
+lopsubex_objs := lopsubex.o lopsubex.lsg.o $(liblopsub_objs)
+
+LLS_CFLAGS := -g -fPIC
+STRICT_CFLAGS := -Wall
+STRICT_CFLAGS += -Werror-implicit-function-declaration
 
 $(lsg_objs) $(liblopsub_objs) $(lopsubex_objs): %.o: %.c
 lopsubgen.o config_file.o:
-	$(CC) -g -c -o $@ ${@:.o=.c}
+	$(CC) $(CPPFLAGS) $(LLS_CFLAGS) $(CFLAGS) -c -o $@ ${@:.o=.c}
 lsg1.o: lsg.c lsg.h
-	$(CC) -g -DSTAGE1 -Wall -g -c $< -o $@
+	$(CC) $(CPPFLAGS) $(LLS_CFLAGS) $(STRICT_CFLAGS) $(CFLAGS) -DSTAGE1 -c -o $@ $<
 %.o: %.c
-	$(CC) -Wall -I. -g -c -o $@ $<
+	$(CC) -I. $(CPPFLAGS) $(LLS_CFLAGS) $(STRICT_CFLAGS) $(CFLAGS) -c -o $@ $<
 
 # linking
 lopsubgen-stage1: $(lsg1_objs)
 	$(CC) -Wall -g $(lsg1_objs) -o $@
 lopsubgen: $(lsg_objs)
 	$(CC) -Wall -g -o $@ $(lsg_objs)
+$(REALNAME): $(liblopsub_objs)
+	$(CC) --shared -Wl,-soname,liblopsub.so.$(MAJOR_VERSION) -o $@ $^
 liblopsub.a: $(liblopsub_objs)
 	$(AR) -rcs $@ $^
-lopsubex: $(lopsubex_objs) liblopsub.a
-	$(CC) -Wall -g -o $@ $^
+
+lopsubex: $(lopsubex_objs) $(REALNAME)
+	$(CC) -Wall -g -o $@ $(lopsubex_objs)
 
 # web
 html := $(addprefix web/, $(addsuffix .html, \
-	index lopsub-api lopsubgen.1 lopsubex.1 $(m4_man_pages)))
-$(html): $(addprefix web/, $(addsuffix .html, header footer))
-
+	index lopsub-api lopsubgen.1 lopsubex.1 $(m4_man_pages:.gz=)))
 www: $(html)
-
-web/lopsub-api.html: lopsub.h.m4
+web/lopsub-api.html: lopsub.h.m4 web/header.html web/footer.html
 	$(M4) -DOUTPUT_MODE=HTML web/header.html $(gendoc) \
 		$< web/footer.html > $@
 web/index.html: web/lopsub.7.html
 	$(LN) -s $(notdir $<) $@
-web/%.html: %.gz
+web/%.html: %.gz web/header.html
 	$(CP) web/header.html $@
 	$(ZCAT) $< | $(GROFF) -m man -Thtml | sed -e '1,/^<body>/d' >> $@
 
 install: $(all)
 	$(INSTALL) -d $(DESTDIR)$(PREFIX)/lib $(DESTDIR)$(PREFIX)/include \
-		$(DESTDIR)$(PREFIX)/man/man1 $(DESTDIR)$(PREFIX)/man/man5 \
-		$(DESTDIR)$(PREFIX)/man/man7 $(DESTDIR)$(PREFIX)/bin
-	$(INSTALL) -m 644 liblopsub.a $(DESTDIR)$(PREFIX)/lib
+		$(DESTDIR)$(PREFIX)/share/man/man1 $(DESTDIR)$(PREFIX)/share/man/man5 \
+		$(DESTDIR)$(PREFIX)/share/man/man7 $(DESTDIR)$(PREFIX)/bin
+	$(INSTALL) -m 644 $(REALNAME) $(DESTDIR)$(PREFIX)/lib
+	$(LN) -s $(REALNAME) $(DESTDIR)$(PREFIX)/lib/$(SONAME)
+	$(LN) -s $(SONAME) $(DESTDIR)$(PREFIX)/lib/$(LINKERNAME)
 	$(INSTALL) -m 755 lopsubgen $(DESTDIR)$(PREFIX)/bin
 	$(INSTALL) -m 644 lopsub.h $(DESTDIR)$(PREFIX)/include
 	$(INSTALL) -m 644 lopsub-internal.h $(DESTDIR)$(PREFIX)/include
-	$(INSTALL) -m 644 lopsubgen.1.gz $(DESTDIR)$(PREFIX)/man/man1
-	$(INSTALL) -m 644 lopsub-suite.5.gz $(DESTDIR)$(PREFIX)/man/man5
-	$(INSTALL) -m 644 lopsub.7.gz $(DESTDIR)$(PREFIX)/man/man7
+	$(INSTALL) -m 644 lopsubgen.1.gz $(DESTDIR)$(PREFIX)/share/man/man1
+	$(INSTALL) -m 644 lopsub-suite.5.gz $(DESTDIR)$(PREFIX)/share/man/man5
+	$(INSTALL) -m 644 lopsub.7.gz $(DESTDIR)$(PREFIX)/share/man/man7
 
 clean:
 	$(RM) $(all) $(html) *.o *.man
 distclean: clean
 	$(RM) *.lsg.c *.lsg.h lopsubgen.c config_file.c lopsubgen-stage1 \
 		lopsub.h lopsub.7 lopsub-suite.5 version.c
-
+-include Makefile.local