use automake and libtool

This commits replaces the handwritten makefile with automake+libtool.
There is some hackery needed for the LD_PRELOAD shared library,
but apart from that there is nothing special and it is a large gain in
portability and standardization.

The spec file is modified as little as is needed to properly build
the RPMs.

Makefile.am

@@ -0,0 +1,78 @@
+# Generic definitions
+
+ACLOCAL_AMFLAGS =-I m4
+AUTOMAKE_OPTIONS = foreign subdir-objects
+AM_CPPFLAGS=-I. -I$(srcdir)/include "-D_U_=__attribute__((unused))"
+AM_CFLAGS=$(WARN_CFLAGS)
+LDADD = lib/libiscsi.la -lpopt
+
+EXTRA_DIST = autogen.sh COPYING.LESSER \
+	     packaging/RPM/libiscsi.spec.in packaging/RPM/makerpms.sh
+
+# libiscsi shared library
+
+iscsi_includedir = $(includedir)/iscsi
+dist_iscsi_include_HEADERS = include/iscsi.h include/scsi-lowlevel.h
+dist_noinst_HEADERS = include/iscsi-private.h include/md5.h include/slist.h
+
+lib_LTLIBRARIES = lib/libiscsi.la
+lib_libiscsi_la_SOURCES = \
+	lib/connect.c lib/crc32c.c lib/discovery.c lib/init.c \
+	lib/login.c lib/md5.c lib/nop.c lib/pdu.c lib/scsi-command.c \
+	lib/scsi-lowlevel.c lib/socket.c lib/sync.c lib/task_mgmt.c
+
+SONAME=$(firstword $(subst ., ,$(VERSION)))
+SOREL=$(shell printf "%d%02d%02d" $(subst ., ,$(VERSION)))
+lib_libiscsi_la_LDFLAGS = \
+	-version-info $(SONAME):$(SOREL):0 -bindir $(bindir) -no-undefined
+
+# libiscsi utilities
+
+bin_PROGRAMS = bin/iscsi-inq bin/iscsi-ls
+bin_iscsi_inq_SOURCES = src/iscsi-inq.c
+bin_iscsi_ls_SOURCES = src/iscsi-ls.c
+
+# Other examples
+
+noinst_PROGRAMS = bin/iscsiclient
+bin_iscsiclient_SOURCES = examples/iscsiclient.c
+
+EXTRA_PROGRAMS = bin/iscsi-dd
+bin_iscsi_dd_SOURCES = examples/iscsi-dd.c
+
+# libiscsi test tool
+
+noinst_PROGRAMS += bin/iscsi-test
+dist_noinst_HEADERS += test-tool/iscsi-test.h
+bin_iscsi_test_CPPFLAGS = $(AM_CPPFLAGS) -I$(srcdir)/test-tool
+bin_iscsi_test_SOURCES = test-tool/iscsi-test.c \
+	test-tool/0100_read10_simple.c test-tool/0101_read10_beyond_eol.c \
+	test-tool/0102_read10_0blocks.c test-tool/0103_read10_rdprotect.c \
+	test-tool/0104_read10_flags.c test-tool/0105_read10_invalid.c \
+	test-tool/0110_readcapacity10_simple.c \
+	test-tool/0111_readcapacity10_pmi.c test-tool/0120_read6_simple.c \
+	test-tool/0121_read6_beyond_eol.c test-tool/0122_read6_invalid.c
+
+# LD_PRELOAD library.
+
+if LD_ISCSI
+EXTRA_PROGRAMS += bin/ld_iscsi
+CLEANFILES = bin/ld_iscsi.o bin/ld_iscsi.so
+
+# This gets a bit messy:
+#
+# 1) let automake compile the sources
+bin_ld_iscsi_SOURCES = src/ld_iscsi.c
+bin_ld_iscsi_CFLAGS = $(AM_CFLAGS) -fPIC
+
+# 2) let libtool link in the static version of the library
+noinst_LTLIBRARIES = lib/libiscsi_convenience.la
+lib_libiscsi_convenience_la_SOURCES = $(lib_libiscsi_la_SOURCES)
+bin/ld_iscsi.o: src/bin_ld_iscsi-ld_iscsi.o lib/libiscsi_convenience.la
+	$(LIBTOOL) --mode=link $(CC) -o $@ $^
+
+# 3) Manually create the .so file.
+bin_SCRIPTS = bin/ld_iscsi.so
+bin/ld_iscsi.so: bin/ld_iscsi.o
+	$(CC) -shared -o bin/ld_iscsi.so bin/ld_iscsi.o -ldl
+endif