`gcc-12` will forbid std::string(nullptr_t) constructors (as they never had a defined behaviour): operf_stats.cpp:182:24: error: use of deleted function 'std::__cxx11::basic_string...; std::nullptr_t = std::nullptr_t]' 182 | return NULL; | ^~~~ Signed-off-by: Sergei Trofimovich --- libperf_events/operf_stats.cpp | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/libperf_events/operf_stats.cpp b/libperf_events/operf_stats.cpp index 3cc28a75..a7bd0aec 100644 --- a/libperf_events/operf_stats.cpp +++ b/libperf_events/operf_stats.cpp @@ -179,7 +179,7 @@ static string create_stats_dir(string const & cur_sampledir) if (rc && (errno != EEXIST)) { cerr << "Error trying to create stats dir. " << endl; perror("mkdir failed with"); - return NULL; + return ""; } return stats_dir; } -- 2.33.1