Fix non-OS Perl xsubpp issue

This should be the right fix.
Also cleaned up compile warnings from Clang in the cap5 build.

src/cap5/Cap5.xs

@@ -462,7 +462,7 @@ SV * CA_new(const char *class, const char *name, ...) {
         SvREFCNT_dec(ca_ref);
         if (pch->conn_sub)
             SvREFCNT_dec(pch->conn_sub);
-        croak(get_error_msg(status));
+        croak("%s", get_error_msg(status));
     }
 
     return ca_ref;
@@ -491,7 +491,7 @@ void CA_DESTROY(SV *ca_ref) {
     Safefree(pch);
 
     if (status != ECA_NORMAL)
-        croak(get_error_msg(status));
+        croak("%s", get_error_msg(status));
 }
 
 
@@ -516,7 +516,7 @@ void CA_change_connection_event(SV *ca_ref, SV *sub) {
     status = ca_change_connection_event(pch->chan, handler);
 
     if (status != ECA_NORMAL) {
-        croak(get_error_msg(status));
+        croak("%s", get_error_msg(status));
     }
 }
 
@@ -600,7 +600,7 @@ void CA_put(SV *ca_ref, SV *val, ...) {
         Safefree(p.dbr);
     }
     if (status != ECA_NORMAL) {
-        croak(get_error_msg(status));
+        croak("%s", get_error_msg(status));
     }
     XSRETURN(0);
 }
@@ -695,7 +695,7 @@ void CA_put_callback(SV *ca_ref, SV *sub, SV *val, ...) {
     }
     if (status != ECA_NORMAL) {
         SvREFCNT_dec(put_sub);
-        croak(get_error_msg(status));
+        croak("%s", get_error_msg(status));
     }
     XSRETURN(0);
 }
@@ -736,7 +736,7 @@ void CA_put_acks(SV *ca_ref, SV *sevr, ...) {
         status = ca_put(DBR_PUT_ACKS, pch->chan, &acks);
 
     if (status != ECA_NORMAL)
-        croak(get_error_msg(status));
+        croak("%s", get_error_msg(status));
 
     XSRETURN(0);
 }
@@ -760,7 +760,7 @@ void CA_put_ackt(SV *ca_ref, int ack, ...) {
         status = ca_put(DBR_PUT_ACKS, pch->chan, &ackt);
 
     if (status != ECA_NORMAL)
-        croak(get_error_msg(status));
+        croak("%s", get_error_msg(status));
 
     XSRETURN(0);
 }
@@ -788,7 +788,7 @@ void CA_get(SV *ca_ref) {
         status = ca_get(best_type(pch), pch->chan, &pch->data);
     }
     if (status != ECA_NORMAL) {
-        croak(get_error_msg(status));
+        croak("%s", get_error_msg(status));
     }
 }
 
@@ -869,7 +869,7 @@ void CA_get_callback(SV *ca_ref, SV *sub, ...) {
 
 exit_croak:
     SvREFCNT_dec(get_sub);
-    croak(croak_msg);
+    croak("%s", croak_msg);
 }
 
 
@@ -953,7 +953,7 @@ SV * CA_create_subscription(SV *ca_ref, const char *mask_str, SV *sub, ...) {
 exit_croak:
     SvREFCNT_dec(mon_ref);
     SvREFCNT_dec(mon_sub);
-    croak(croak_msg);
+    croak("%s", croak_msg);
 }
 
 
@@ -970,7 +970,7 @@ void CA_clear_subscription(const char *class, SV *mon_ref) {
     status = ca_clear_subscription(event);
 
     if (status != ECA_NORMAL) {
-        croak(get_error_msg(status));
+        croak("%s", get_error_msg(status));
     }
 }
 
@@ -980,7 +980,7 @@ void CA_clear_subscription(const char *class, SV *mon_ref) {
 void CA_pend_io(const char *class, double timeout) {
     int status = ca_pend_io(timeout);
     if (status != ECA_NORMAL) {
-        croak(get_error_msg(status));
+        croak("%s", get_error_msg(status));
     }
 }
 
@@ -995,7 +995,7 @@ int CA_test_io(const char *class) {
 void CA_pend_event(const char *class, double timeout) {
     int status = ca_pend_event(timeout);
     if (status != ECA_TIMEOUT) {
-        croak(get_error_msg(status));
+        croak("%s", get_error_msg(status));
     }
 }
 
@@ -1089,7 +1089,7 @@ void CA_add_exception_event(const char *class, SV *sub) {
     if (status != ECA_NORMAL) {
         SvREFCNT_dec(exception_sub);
         exception_sub = NULL;
-        croak(get_error_msg(status));
+        croak("%s", get_error_msg(status));
     }
 }
 
@@ -1147,7 +1147,7 @@ void CA_replace_printf_handler(const char *class, SV *sub) {
     if (status != ECA_NORMAL) {
         SvREFCNT_dec(printf_sub);
         printf_sub = NULL;
-        croak(get_error_msg(status));
+        croak("%s", get_error_msg(status));
     }
 }
 

src/cap5/Makefile

@@ -53,7 +53,8 @@ include $(TOP)/configure/RULES
 
 ifdef T_A
   EXTUTILS = $(shell $(PERL) ../perlConfig.pl privlib)/ExtUtils
-  XSUBPP = $(firstword $(wildcard /usr/bin/xsubpp $(EXTUTILS)/xsubpp))
+  PERLBIN = $(shell $(PERL) ../perlConfig.pl bin)
+  XSUBPP = $(firstword $(wildcard $(PERLBIN)/xsubpp $(EXTUTILS)/xsubpp))
 
   %.c: ../%.xs
 	$(RM) $@ $@_new