deal with some gcc warnings

Message-ID: <45122C6F.9080904@iki.fi>

p4raw-id: //depot/perl@28877

8 files changed, 14 insertions, 11 deletions

diff --git a/doio.c b/doio.c
index e6909cb351..ef16b07906 100644
--- a/doio.c
+++ b/doio.c
@@ -1333,6 +1333,8 @@ Perl_my_stat(pTHX)
 	    Perl_warner(aTHX_ packWARN(WARN_NEWLINE), PL_warn_nl, "stat");
 	return PL_laststatval;
     }
+    /* Should we warn/croak here? Or do something smart/useful? */
+    return (PL_laststatval = -1);
 }
 
 
diff --git a/reentr.c b/reentr.c
index 9be6f7fc70..bd466525fa 100644
--- a/reentr.c
+++ b/reentr.c
@@ -44,7 +44,7 @@ Perl_reentrant_size(pTHX) {
 #ifdef HAS_GETGRNAM_R
 #   if defined(HAS_SYSCONF) && defined(_SC_GETGR_R_SIZE_MAX) && !defined(__GLIBC__)
 	PL_reentrant_buffer->_grent_size = sysconf(_SC_GETGR_R_SIZE_MAX);
-	if (PL_reentrant_buffer->_grent_size == -1)
+	if ((IV)PL_reentrant_buffer->_grent_size == (IV)-1)
 		PL_reentrant_buffer->_grent_size = REENTRANTUSUALSIZE;
 #   else
 #       if defined(__osf__) && defined(__alpha) && defined(SIABUFSIZ)
@@ -79,7 +79,7 @@ Perl_reentrant_size(pTHX) {
 #ifdef HAS_GETPWNAM_R
 #   if defined(HAS_SYSCONF) && defined(_SC_GETPW_R_SIZE_MAX) && !defined(__GLIBC__)
 	PL_reentrant_buffer->_pwent_size = sysconf(_SC_GETPW_R_SIZE_MAX);
-	if (PL_reentrant_buffer->_pwent_size == -1)
+	if ((IV)PL_reentrant_buffer->_pwent_size == (IV)-1)
 		PL_reentrant_buffer->_pwent_size = REENTRANTUSUALSIZE;
 #   else
 #       if defined(__osf__) && defined(__alpha) && defined(SIABUFSIZ)
@@ -101,7 +101,7 @@ Perl_reentrant_size(pTHX) {
 #ifdef HAS_GETSPNAM_R
 #   if defined(HAS_SYSCONF) && defined(_SC_GETPW_R_SIZE_MAX) && !defined(__GLIBC__)
 	PL_reentrant_buffer->_spent_size = sysconf(_SC_GETPW_R_SIZE_MAX);
-	if (PL_reentrant_buffer->_spent_size == -1)
+	if ((IV)PL_reentrant_buffer->_spent_size == (IV)-1)
 		PL_reentrant_buffer->_spent_size = REENTRANTUSUALSIZE;
 #   else
 #       if defined(__osf__) && defined(__alpha) && defined(SIABUFSIZ)
diff --git a/reentr.pl b/reentr.pl
index 13cf4d1087..094a83cbd7 100644
--- a/reentr.pl
+++ b/reentr.pl
@@ -547,7 +547,7 @@ EOF
 	    push @size, <<EOF;
 #   if defined(HAS_SYSCONF) && defined($sc) && !defined(__GLIBC__)
 	PL_reentrant_buffer->$sz = sysconf($sc);
-	if (PL_reentrant_buffer->$sz == -1)
+	if ((IV)PL_reentrant_buffer->$sz == (IV)-1)
 		PL_reentrant_buffer->$sz = REENTRANTUSUALSIZE;
 #   else
 #       if defined(__osf__) && defined(__alpha) && defined(SIABUFSIZ)
diff --git a/regcomp.c b/regcomp.c
index 871043e051..468464696b 100644
--- a/regcomp.c
+++ b/regcomp.c
@@ -1756,8 +1756,8 @@ S_make_trie(pTHX_ RExC_state_t *pRExC_state, regnode *startbranch, regnode *firs
         
 #ifdef DEBUGGING
         
-        U32 mjd_offset;
-        U32 mjd_nodelen;
+        U32 mjd_offset = 0;
+        U32 mjd_nodelen = 0;
 #endif
         /*
            This means we convert either the first branch or the first Exact,
diff --git a/regexec.c b/regexec.c
index 679e31fc36..6aa059a097 100644
--- a/regexec.c
+++ b/regexec.c
@@ -474,7 +474,7 @@ Perl_re_intuit_start(pTHX_ regexp *prog, SV *sv, char *strpos,
 #ifdef DEBUGGING	/* 7/99: reports of failure (with the older version) */
     if (end_shift < 0)
 	Perl_croak(aTHX_ "panic: end_shift: %"IVdf" pattern:\n%s\n ",
-	    end_shift,prog->precomp);
+		   (IV)end_shift, prog->precomp);
 #endif
 
   restart:
@@ -868,7 +868,7 @@ Perl_re_intuit_start(pTHX_ regexp *prog, SV *sv, char *strpos,
             endpos= strend;
 		    
         DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "start_shift: %"IVdf" check_at: %d s: %d endpos: %d\n",
-                      start_shift,check_at-strbeg,s-strbeg,endpos-strbeg));
+				      (IV)start_shift, check_at - strbeg, s - strbeg, endpos - strbeg));
 	
 	t = s;
         s = find_byclass(prog, prog->regstclass, s, endpos, NULL);
diff --git a/sv.c b/sv.c
index 6e395efed2..1112f21c62 100644
--- a/sv.c
+++ b/sv.c
@@ -1851,6 +1851,7 @@ STATIC int
 S_sv_2iuv_non_preserve(pTHX_ register SV *sv, I32 numtype)
 {
     dVAR;
+    PERL_UNUSED_ARG(numtype); /* Used only under DEBUGGING? */
     DEBUG_c(PerlIO_printf(Perl_debug_log,"sv_2iuv_non '%s', IV=0x%"UVxf" NV=%"NVgf" inttype=%"UVXf"\n", SvPVX_const(sv), SvIVX(sv), SvNVX(sv), (UV)numtype));
     if (SvNVX(sv) < (NV)IV_MIN) {
 	(void)SvIOKp_on(sv);
diff --git a/toke.c b/toke.c
index f5aa5d1ca4..1cce94790a 100644
--- a/toke.c
+++ b/toke.c
@@ -2193,8 +2193,8 @@ S_scan_const(pTHX_ char *start)
 		        s += 3;
 			len = e - s;
 			uv = grok_hex(s, &len, &flags, NULL);
-			if ( len != e - s ) {
-			    uv=0xFFFD;
+			if ( e > s && len != (STRLEN)(e - s) ) {
+			    uv = 0xFFFD;
 			}
 			s = e + 1;
 			goto NUM_ESCAPE_INSERT;
diff --git a/util.c b/util.c
index 7e26322d17..d9fde3e5c2 100644
--- a/util.c
+++ b/util.c
@@ -5475,7 +5475,7 @@ Perl_my_clearenv(pTHX)
     char *buf = (char*)safesysmalloc(bufsiz);
     while (*environ != NULL) {
       char *e = strchr(*environ, '=');
-      int l = e ? e - *environ : strlen(*environ);
+      int l = e ? e - *environ : (int)strlen(*environ);
       if (bsiz < l + 1) {
         (void)safesysfree(buf);
         bsiz = l + 1; /* + 1 for the \0. */