4 files changed, 10 insertions, 5 deletions
diff --git a/doio.c b/doio.c
index 8d55d3f0cf..dfd48d2d8b 100644
--- a/doio.c
+++ b/doio.c
@@ -1974,7 +1974,8 @@ Perl_do_ipcget(pTHX_ I32 optype, SV **mark, SV **sp)
     const key_t key = (key_t)SvNVx(*++mark);
     const I32 n = (optype == OP_MSGGET) ? 0 : SvIVx(*++mark);
     const I32 flags = SvIVx(*++mark);
-    (void)sp;
+
+    PERL_UNUSED_ARG(sp);
 
     SETERRNO(0,0);
     switch (optype)
diff --git a/pad.c b/pad.c
index 0b61c3c26c..0a446db5bc 100644
--- a/pad.c
+++ b/pad.c
@@ -1562,6 +1562,8 @@ Perl_pad_fixup_inner_anons(pTHX_ PADLIST *padlist, CV *old_cv, CV *new_cv)
     AV * const comppad = (AV*)AvARRAY(padlist)[1];
     SV ** const namepad = AvARRAY(comppad_name);
     SV ** const curpad = AvARRAY(comppad);
+    PERL_UNUSED_ARG(old_cv);
+
     for (ix = AvFILLp(comppad_name); ix > 0; ix--) {
         const SV * const namesv = namepad[ix];
 	if (namesv && namesv != &PL_sv_undef
diff --git a/perl.c b/perl.c
index c9058bb4f8..3a17b4882a 100644
--- a/perl.c
+++ b/perl.c
@@ -4196,6 +4196,8 @@ FIX YOUR KERNEL, OR PUT A C WRAPPER AROUND THIS SCRIPT!\n");
     Perl_croak(aTHX_ "Can't do setuid (suidperl cannot exec perl)\n");
 #endif /* IAMSUID */
 #else /* !DOSUID */
+    PERL_UNUSED_ARG(fdscript);
+    PERL_UNUSED_ARG(suidscript);
     if (PL_euid != PL_uid || PL_egid != PL_gid) {	/* (suidperl doesn't exist, in fact) */
 #ifndef SETUID_SCRIPTS_ARE_SECURE_NOW
 	PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf);	/* may be either wrapped or real suid */
@@ -4210,8 +4212,8 @@ FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
 	/* not set-id, must be wrapped */
     }
 #endif /* DOSUID */
-    (void)validarg;
-    (void)scriptname;
+    PERL_UNUSED_ARG(validarg);
+    PERL_UNUSED_ARG(scriptname);
 }
 
 STATIC void
diff --git a/pp_sys.c b/pp_sys.c
index 1659888abe..8e8004ad43 100644
--- a/pp_sys.c
+++ b/pp_sys.c
@@ -307,8 +307,8 @@ S_emulate_eaccess(pTHX_ const char* path, Mode_t mode)
 STATIC int
 S_emulate_eaccess(pTHX_ const char* path, Mode_t mode)
 {
-    (void)path;
-    (void)mode;
+    PERL_UNUSED_ARG(path);
+    PERL_UNUSED_ARG(mode);
     Perl_croak(aTHX_ "switching effective uid is not implemented");
     /*NOTREACHED*/
     return -1;