Fix build warnings and checkcfg errors with musl and libc++. (#3244)

* Fix musl include warning.

* Fix test/cfg errors with musl/libc++.

* Use correct C++ include for PR #3244

Co-authored-by: keinflue <>

cli/filelister.cpp

@@ -179,7 +179,7 @@ bool FileLister::fileExists(const std::string &path)
 
 #include <dirent.h>
 #include <sys/stat.h>
-#include <sys/errno.h>
+#include <cerrno>
 
 
 static std::string addFiles2(std::map<std::string, std::size_t> &files,

test/cfg/posix.c

@@ -12,6 +12,8 @@
 #include <dirent.h>
 #include <sys/mman.h>
 #include <sys/socket.h>
+#include <sys/time.h>
+#include <sys/types.h>
 #include <dlfcn.h>
 #include <fcntl.h>
 // unavailable on some linux systems #include <ndbm.h>

test/cfg/std.cpp

@@ -12,6 +12,7 @@
 #include <cstdlib>
 #include <ctime>
 #include <cctype>
+#include <clocale>
 #include <complex>
 #include <cassert>
 #include <cwchar>