//namespace lyx {
///About dialog, inset info, export headers
-extern char const * lyx_version;
+extern char const * const lyx_version;
//.lyx header. We don't want lyx_version because of VCS conflicts.
extern const int lyx_version_major;
extern const int lyx_version_minor;
/// This is the version information shown by 'lyx -version'
extern char const * const lyx_version_info;
+// Do not remove the comment below, so we get merge conflict in
+// independent branches. Instead add your own.
+#define LYX_FORMAT_LYX 424 // jrioux : \cite_engine_type (authoryear|numerical)
+#define LYX_FORMAT_TEX2LYX 424 // jrioux : \cite_engine_type (authoryear|numerical)
+
+#if LYX_FORMAT_FOR_TEX2LYX != LYX_FORMAT_FOR_LYX
+#warning "tex2lyx produces an out of date file format."
+#warning "Please update tex2lyx as soon as possible, since it depends implicitly"
+#warning "on the current file format in some places (this causes bugs like #7780)."
+#endif
+
//} // namespace lyx
#endif