diff --git a/qmake/option.cpp b/qmake/option.cpp index a2bd9386664..677899950c8 100644 --- a/qmake/option.cpp +++ b/qmake/option.cpp @@ -488,7 +488,7 @@ bool Option::postProcessProject(QMakeProject *project) Option::dir_sep = project->dirSep().toQString(); - if (Option::output_dir.startsWith(project->buildRoot())) + if (!project->buildRoot().isEmpty() && Option::output_dir.startsWith(project->buildRoot())) Option::mkfile::cachefile_depth = Option::output_dir.mid(project->buildRoot().length()).count('/');