Index: .fossil-settings/ignore-glob
==================================================================
--- .fossil-settings/ignore-glob
+++ .fossil-settings/ignore-glob
@@ -25,5 +25,7 @@
 libconfig.dll.def
 libconfig.so
 test-lc
 test-lc.exe
 test.cfg
+libconfig.vers
+libconfig.syms

Index: Makefile.in
==================================================================
--- Makefile.in
+++ Makefile.in
@@ -34,15 +34,18 @@
 # The following two lines need to be kept syncronised.
 OBJS = libconfig.o conf_space.o conf_section.o conf_apache.o conf_colon.o conf_equal.o conf_xml.o @LIBOBJS@
 SHOBJS = libconfig_shr.o conf_space_shr.o conf_section_shr.o conf_apache_shr.o conf_colon_shr.o conf_equal_shr.o conf_xml_shr.o @SHLIBOBJS@
 
 all: $(LIBS) $(BINS)
-libconfig.$(SHOBJEXT): $(SHOBJS)
-	$(CC) $(CPPFLAGS) $(CFLAGS) $(SHOBJFLAGS) $(SHOBJLDFLAGS) -o $@ $^ $(LDFLAGS)
+
+libconfig.$(SHOBJEXT): $(SHOBJS) libconfig.vers libconfig.syms
+	$(CC) $(CPPFLAGS) $(CFLAGS) $(SHOBJFLAGS) $(SHOBJLDFLAGS) -o $@ $(SHOBJS) $(LDFLAGS)
+	-@WEAKENSYMS@ libconfig.$(SHOBJEXT)
+	-@REMOVESYMS@ libconfig.$(SHOBJEXT)
 
 libconfig.$(AREXT): $(OBJS)
-	$(AR) rcu $@ $^
+	$(AR) rcu $@ $(OBJS)
 	-$(RANLIB) $@
 
 libconfig.o: $(srcdir)/libconfig.c $(srcdir)/compat.h $(srcdir)/win32.h $(srcdir)/config.h libconfig.h
 libconfig_shr.o: $(srcdir)/libconfig.c $(srcdir)/compat.h $(srcdir)/win32.h $(srcdir)/config.h libconfig.h
 
@@ -49,10 +52,19 @@
 %_shr.o: $(srcdir)/%.c
 	$(CC) $(CPPFLAGS) $(CFLAGS) $(SHOBJFLAGS) -c -o $@ "$(filter %.c, $^)"
 
 %.o: $(srcdir)/%.c
 	$(CC) $(CPPFLAGS) $(CFLAGS) -c -o $@ "$(filter %.c, $^)"
+
+libconfig.vers: libconfig.syms.in
+	rm -f libconfig.vers
+	echo 'LIBCONFIG_0.3.0 {' > '$@'
+	echo '	global:' >> '$@'
+	cat libconfig.syms.in | sed 's/^@SYMPREFIX@//;s/^/		/;s/$$/;/' >> '$@'
+	echo '	local:' >> '$@'
+	echo '		*;' >> '$@'
+	echo '};' >> '$@'
 
 test-lc$(EXEEXT): $(LIBS) $(srcdir)/test-lc.c
 	$(CC) $(CPPFLAGS) $(CFLAGS) -o $@ $(filter %.c, $^) $(LDFLAGS) -Wl,-R -Wl,. -L. -lconfig
 
 install: all libconfig.h
@@ -80,11 +92,11 @@
 
 clean:
 	rm -f *.o $(BINS) $(LIBS) *~ test-lc$(EXEEXT) *.dll.a *.dll.def *.dll
 
 distclean: clean
-	rm -f Makefile config.h config.status config.log lc_geterrno.3 lc_process.3 lc_cleanup.3 lc_process_file.3 lc_register_var.3 lc_geterrstr.3 lc_register_callback.3 libconfig.3
+	rm -f Makefile config.h config.status config.log lc_geterrno.3 lc_process.3 lc_cleanup.3 lc_process_file.3 lc_register_var.3 lc_geterrstr.3 lc_register_callback.3 libconfig.3 libconfig.syms
 
 mrproper: distclean
 	rm -f aclocal.m4 config.guess config.sub install-sh configure
 
 .PHONY: all clean distclean install

Index: aclocal/libconfig.m4
==================================================================
--- aclocal/libconfig.m4
+++ aclocal/libconfig.m4
@@ -48,5 +48,28 @@
 		DC_ASK_OPTLIB(opennet, fopen_net, opennet.h, [      Enable opennet support (auto)], libopennet, HAVE_LIBOPENNET, HAVE_OPENNET_H)
 	else
 		AC_DEFINE(ENABLE_SMALL, [1], [Define to 1 if you want to produce a minimalistic build.])
 	fi
 ])
+
+AC_DEFUN(LC_SET_SONAME, [
+	SAVE_LDFLAGS="$LDFLAGS"
+
+	AC_MSG_CHECKING([how to specify soname])
+
+	for try in "-Wl,--soname,$1" '__fail__'; do
+		LDFLAGS="$SAVE_LDFLAGS"
+
+		if test "${try}" = '__fail__'; then
+			AC_MSG_RESULT([can't])
+
+			break
+		fi
+
+		LDFLAGS="${LDFLAGS} ${try}"
+		AC_TRY_LINK([void TestTest(void) { return; }], [], [
+			AC_MSG_RESULT([$try])
+
+			break
+		])
+	done
+])

Index: build/prep.sh
==================================================================
--- build/prep.sh
+++ build/prep.sh
@@ -22,10 +22,13 @@
 autoconf
 automake -fca
 
 rm -rf autom4te.cache
 
+rm -f libconfig.vers
+make -f Makefile.in libconfig.vers
+
 # Add Linux/MUSL support if missing
 if ! grep '[-]musl' config.sub >/dev/null 2>/dev/null; then
 	sed 's@\(-*\)linux-gnu\* @\1linux-musl | &@g' config.sub > config.sub.new
 	cat config.sub.new > config.sub
 	rm -f config.sub.new

Index: configure.ac
==================================================================
--- configure.ac
+++ configure.ac
@@ -37,9 +37,15 @@
 AC_HEADER_TIME
 
 AC_REPLACE_FUNCS(strsep strtoll getuid)
 AC_CHECK_FUNCS(getpwuid strtof)
 
+dnl Setup stable API
+DC_SETUP_STABLE_API(libconfig.vers, libconfig.syms)
+
+dnl Set a soname
+LC_SET_SONAME([libconfig.so.$PACKAGE_VERSION])
+
 dnl This MUST be last.
 DC_SYNC_SHLIBOBJS
 
-AC_OUTPUT(Makefile lc_geterrno.3 lc_process.3 lc_register_var.3 lc_geterrstr.3 lc_seterrstr.3 lc_register_callback.3 lc_cleanup.3 lc_process_file.3 libconfig.3 lc_handle_type.3)
+AC_OUTPUT(Makefile lc_geterrno.3 lc_process.3 lc_register_var.3 lc_geterrstr.3 lc_seterrstr.3 lc_register_callback.3 lc_cleanup.3 lc_process_file.3 libconfig.3 lc_handle_type.3 libconfig.syms)

ADDED   libconfig.syms.in
Index: libconfig.syms.in
==================================================================
--- /dev/null
+++ libconfig.syms.in
@@ -0,0 +1,21 @@
+@SYMPREFIX@lc_cleanup
+@SYMPREFIX@lc_geterrno
+@SYMPREFIX@lc_geterrstr
+@SYMPREFIX@lc_handle_type
+@SYMPREFIX@lc_process
+@SYMPREFIX@lc_process_conf_apache
+@SYMPREFIX@lc_process_conf_colon
+@SYMPREFIX@lc_process_conf_equal
+@SYMPREFIX@lc_process_conf_section
+@SYMPREFIX@lc_process_conf_space
+@SYMPREFIX@lc_process_conf_xml
+@SYMPREFIX@lc_process_file
+@SYMPREFIX@lc_process_var
+@SYMPREFIX@lc_register_callback
+@SYMPREFIX@lc_register_var
+@SYMPREFIX@lc_seterrstr
+@SYMPREFIX@lc_err_usererrmsg
+@SYMPREFIX@lc_errfile
+@SYMPREFIX@lc_errline
+@SYMPREFIX@lc_errno
+@SYMPREFIX@lc_optind