Fix compilation errors in mg.c with MinGW/gcc -xc++

error: 'sip' was not declared in this scope
error: 'uap' was not declared in this scope

1 files changed, 2 insertions, 0 deletions

diff --git a/mg.c b/mg.c
index 77dd9c0b6f..4e6dcaff32 100644
--- a/mg.c
+++ b/mg.c
@@ -1389,12 +1389,14 @@ Perl_csighandler(int sig)
 #else
     dTHX;
 #endif
+#if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
 #if defined(__cplusplus) && defined(__GNUC__)
     /* g++ doesn't support PERL_UNUSED_DECL, so the sip and uap
      * parameters would be warned about. */
     PERL_UNUSED_ARG(sip);
     PERL_UNUSED_ARG(uap);
 #endif
+#endif
 #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
     (void) rsignal(sig, PL_csighandlerp);
     if (PL_sig_ignoring[sig]) return;