xmrig-2.13.1/src/base/kernel/Entry.cpp: In function ‘int showVersion()’:
xmrig-2.13.1/src/base/kernel/Entry.cpp:52:16: error: ‘printf’ was not declared in this scope
" with GCC");
^
xmrig-2.13.1/src/base/kernel/Entry.cpp: In static member function ‘static int xmrig::Entry::exec(const xmrig::Process&, xmrig::Entry::Id)’:
xmrig-2.13.1/src/base/kernel/Entry.cpp:109:21: error: ‘printf’ was not declared in this scope
printf(usage);

(this fixed it in my case)

$ diff -C 2 Entry.cpp.1 Entry.cpp
*** Entry.cpp.1 2019-02-25 08:23:59.000000000 -0600
--- Entry.cpp 2019-02-26 12:40:47.798949824 -0600

*** 42,45 ****
--- 42,46 ----
#include "version.h"

• #include <stdio.h>

  static int showVersion()

fedora 24 gcc version 6.3.1 20161221 (Red Hat 6.3.1-1) (GCC)