$NetBSD: patch-ae,v 1.23 2023/04/21 22:03:42 joerg Exp $

Libtoolify.
Pass -no-undefined to libtool for building shared library.
Don't ignore failures during installation.
Don't ignore failures building the examples.
Fix race condition so the examples are built *after* the library.

--- Makefile.in.orig	2020-10-29 19:48:14.000000000 +0000
+++ Makefile.in
@@ -18,6 +18,9 @@
 RL_LIBRARY_VERSION = @LIBVERSION@
 RL_LIBRARY_NAME = readline
 
+SHLIB_MAJOR = @SHLIB_MAJOR@
+SHLIB_MINOR = @SHLIB_MINOR@
+
 PACKAGE = @PACKAGE_NAME@
 VERSION = @PACKAGE_VERSION@
 
@@ -77,6 +80,7 @@ CTAGS = ctags -w
 CFLAGS = @CFLAGS@
 LOCAL_CFLAGS = @LOCAL_CFLAGS@ -DRL_LIBRARY_VERSION='"$(RL_LIBRARY_VERSION)"' @BRACKETED_PASTE@
 CPPFLAGS = @CPPFLAGS@
+LDFLAGS = @LDFLAGS@ -no-undefined
 
 DEFS = @DEFS@ @CROSS_COMPILE@
 LOCAL_DEFS = @LOCAL_DEFS@
@@ -104,9 +108,15 @@ install_examples = @EXAMPLES_INSTALL_TAR
 	${RM} $@
 	$(CC) -c $(CCFLAGS) $<
 
+.SUFFIXES: .lo
+.c.lo:
+	${RM} $@
+	$(LIBTOOL) --tag=CC --mode=compile $(CC) -c $(CCFLAGS) $<
+
 # The name of the main library target.
 LIBRARY_NAME = libreadline.a
 STATIC_LIBS = libreadline.a libhistory.a
+LIBTOOL_LIBS = libreadline.la libhistory.la
 
 # The C code source files for this library.
 CSOURCES = $(srcdir)/readline.c $(srcdir)/funmap.c $(srcdir)/keymaps.c \
@@ -163,8 +173,10 @@ TARGETS = @STATIC_TARGET@ @SHARED_TARGET
 INSTALL_TARGETS = @STATIC_INSTALL_TARGET@ @SHARED_INSTALL_TARGET@
 
 all: $(TARGETS)
+all-libtool: $(LIBTOOL_LIBS)
 
-everything: all examples
+everything: all .WAIT examples
+everything-libtool: all-libtool .WAIT examples
 
 asan:
 	${MAKE} ${MFLAGS} ASAN_CFLAGS='${ASAN_XCFLAGS}' ASAN_LDFLAGS='${ASAN_XLDFLAGS}' everything
@@ -176,17 +188,30 @@ libreadline.a: $(OBJECTS)
 	$(AR) $(ARFLAGS) $@ $(OBJECTS)
 	-test -n "$(RANLIB)" && $(RANLIB) $@
 
+libreadline.la: $(OBJECTS:.o=.lo)
+	$(LIBTOOL) --mode=link --tag=CC $(CC) -o $@ $(OBJECTS:.o=.lo) $(TERMCAP_LIB) \
+		-rpath $(libdir) -version-info $(SHLIB_MAJOR):$(SHLIB_MINOR) \
+		$(LDFLAGS)
+
 libhistory.a: $(HISTOBJ) xmalloc.o xfree.o
 	$(RM) $@
 	$(AR) $(ARFLAGS) $@ $(HISTOBJ) xmalloc.o xfree.o
 	-test -n "$(RANLIB)" && $(RANLIB) $@
 
+libhistory.la: $(HISTOBJ:.o=.lo) xmalloc.lo xfree.lo
+	$(LIBTOOL) --mode=link --tag=CC $(CC) -o $@ $(HISTOBJ:.o=.lo) xmalloc.lo xfree.lo \
+		-rpath $(libdir) -version-info $(SHLIB_MAJOR):$(SHLIB_MINOR) \
+		$(LDFLAGS)
+
 # Since tilde.c is shared between readline and bash, make sure we compile
 # it with the right flags when it's built as part of readline
 tilde.o:	tilde.c
 	rm -f $@
 	$(CC) $(CCFLAGS) -DREADLINE_LIBRARY -c $(srcdir)/tilde.c
 
+tilde.lo:	tilde.c
+	$(LIBTOOL) --mode=compile --tag=CC $(CC) $(CCFLAGS) -DREADLINE_LIBRARY -c $(srcdir)/tilde.c
+
 readline: $(OBJECTS) readline.h rldefs.h chardefs.h ./libreadline.a
 	$(CC) $(CCFLAGS) -DREADLINE_LIBRARY -o $@ $(top_srcdir)/examples/rl.c ./libreadline.a ${TERMCAP_LIB}
 
@@ -223,8 +251,7 @@ documentation: force
 	-( cd doc && $(MAKE) $(MFLAGS) )
 
 examples: force
-	-test -d examples || mkdir examples
-	-(cd examples && ${MAKE} ${MFLAGS} all )
+	(cd examples && ${MAKE} ${MFLAGS} all )
 
 force:
 
@@ -281,6 +308,12 @@ install-examples: installdirs install-he
 uninstall-examples: maybe-uninstall-headers
 	-( cd examples; ${MAKE} ${MFLAGS} DESTDIR=${DESTDIR} uninstall )
 
+install-libtool: installdirs $(LIBTOOL_LIBS) install-headers install-doc
+	-$(LIBTOOL) --mode=uninstall $(RM) $(DESTDIR)$(libdir)/libreadline.la
+	$(LIBTOOL) --mode=install $(INSTALL) libreadline.la $(DESTDIR)$(libdir)
+	-$(LIBTOOL) --mode=uninstall $(RM) $(DESTDIR)$(libdir)/libhistory.la
+	$(LIBTOOL) --mode=install $(INSTALL) libhistory.la $(DESTDIR)$(libdir)
+
 install-doc:	installdirs
 	$(INSTALL_DATA) $(OTHER_DOCS) $(DESTDIR)$(docdir)
 	-( if test -d doc ; then \