liblz4: Add SOVERSION guard

%ci:no-build

packages/liblz4/build.sh

@@ -9,6 +9,18 @@ TERMUX_PKG_AUTO_UPDATE=true
 TERMUX_PKG_BREAKS="liblz4-dev"
 TERMUX_PKG_REPLACES="liblz4-dev"
 
+termux_step_post_get_source() {
+	# Do not forget to bump revision of reverse dependencies and rebuild them
+	# after SOVERSION is changed.
+	local _SOVERSION=1
+
+	local v=$(sed -En 's/^#define LZ4_VERSION_MAJOR +([0-9]+) +.*$/\1/p' \
+			lib/lz4.h)
+	if [ "${_SOVERSION}" != "${v}" ]; then
+		termux_error_exit "SOVERSION guard check failed."
+	fi
+}
+
 termux_step_pre_configure() {
 	TERMUX_PKG_SRCDIR+=/build/cmake
 }