libconfig: Add SOVERSION guard

%ci:no-build

packages/libconfig/build.sh

@@ -11,6 +11,18 @@ TERMUX_PKG_DEPENDS="libc++"
 TERMUX_PKG_BREAKS="libconfig-dev"
 TERMUX_PKG_REPLACES="libconfig-dev"
 
+termux_step_post_get_source() {
+	# Do not forget to bump revision of reverse dependencies and rebuild them
+	# after SOVERSION is changed.
+	local _SOVERSION=11
+
+	local e=$(sed -En 's/^VERINFO\s*=\s*-version-info\s+([0-9]+):([0-9]+):([0-9]+).*/\1-\3/p' \
+			lib/Makefile.am)
+	if [ ! "${e}" ] || [ "${_SOVERSION}" != "$(( "${e}" ))" ]; then
+		termux_error_exit "SOVERSION guard check failed."
+	fi
+}
+
 termux_step_pre_configure() {
 	autoreconf -fi
 }