Tests: Add missing sc_time_stamp calls.

test_regress/t/t_dpi_accessors.cpp

@@ -26,6 +26,8 @@ using std::hex;
 using std::setfill;
 using std::setw;
 
+double sc_time_stamp() { return 0; }
+
 // Convenience function to check we didn't finish unexpectedly
 static void checkFinish(const char* msg) {
     if (Verilated::gotFinish()) {

test_regress/t/t_func_rand.cpp

@@ -9,6 +9,8 @@
 #include <verilated.h>
 #include "Vt_func_rand.h"
 
+double sc_time_stamp() { return 0; }
+
 int main(int argc, char* argv[]) {
     Vt_func_rand* topp = new Vt_func_rand;
 

test_regress/t/t_math_imm2.cpp

@@ -6,6 +6,8 @@
 #include <verilated.h>
 #include "Vt_math_imm2.h"
 
+double sc_time_stamp() { return 0; }
+
 QData MaskVal(int lbit, int hbit) {
     QData val;
     for (val = 0; lbit <= hbit; lbit++) val |= (1ULL << lbit);

test_regress/t/t_mem_slot.cpp

@@ -7,6 +7,8 @@
 #include <verilated.h>
 #include "Vt_mem_slot.h"
 
+double sc_time_stamp() { return 0; }
+
 unsigned int Array[3];
 
 unsigned int StepSim(Vt_mem_slot* sim, unsigned int slot, unsigned int bit, unsigned int val,

test_regress/t/t_multitop_sig.cpp

@@ -10,6 +10,8 @@
 #include <verilated.h>
 #include "Vt_multitop_sig.h"
 
+double sc_time_stamp() { return 0; }
+
 // Use cout to avoid issues with %d/%lx etc
 #define CHECK_RESULT(got, exp) \
     if ((got) != (exp)) { \

test_regress/t/t_order_multidriven.cpp

@@ -8,6 +8,8 @@
 #include "verilated.h"
 #include "verilated_vcd_c.h"
 
+double sc_time_stamp() { return 0; }
+
 Vt_order_multidriven* vcore;
 VerilatedVcdC* vcd;
 vluint64_t vtime;

test_regress/t/t_param_public.cpp

@@ -12,6 +12,8 @@
 #include "Vt_param_public_p.h"
 #include "Vt_param_public_t.h"
 
+double sc_time_stamp() { return 0; }
+
 int main(int argc, char* argv[]) {
     Vt_param_public* topp = new Vt_param_public;
 

test_regress/t/t_trace_c_api.cpp

@@ -11,6 +11,8 @@
 
 #include VM_PREFIX_INCLUDE
 
+double sc_time_stamp() { return 0; }
+
 extern void vcdTestMain(const char* filenamep);
 
 int main(int argc, char** argv, char** env) {

test_regress/t/t_x_assign.cpp

@@ -14,6 +14,8 @@
 #include "verilated.h"
 #include VM_PREFIX_INCLUDE
 
+double sc_time_stamp() { return 0; }
+
 // clang-format off
 #if defined(T_X_ASSIGN_0)
 # define EXPECTED 0