Pass fail information from the preprocessor to the compiler

compiler.h

@@ -1,7 +1,7 @@
 #ifndef IVL_compiler_H
 #define IVL_compiler_H
 /*
- * Copyright (c) 1999-2019 Stephen Williams (steve@icarus.com)
+ * Copyright (c) 1999-2021 Stephen Williams (steve@icarus.com)
  *
  *    This source code is free software; you can redistribute it
  *    and/or modify it in source code form under the terms of the GNU
@@ -308,4 +308,6 @@ extern bool load_vpi_module(const char*path);
  */
 extern ivl_sfunc_as_task_t def_sfunc_as_task;
 
+extern void pre_process_failed(const char*text);
+
 #endif /* IVL_compiler_H */

ivlpp/main.c

@@ -461,6 +461,11 @@ int main(int argc, char*argv[])
 	    fclose(precomp_out);
       }
 
+      if (error_count) {
+	    if (out_path) fprintf(stderr, "%s: had (%u) errors.\n", argv[0], error_count);
+	    fprintf(out, "// Icarus preprocessor had (%u) errors.\n", error_count);
+      }
+
       if (out_path) fclose(out);
 
 	/* Free the source and include directory lists. */

main.cc

@@ -91,6 +91,7 @@ static void signals_handler(int sig)
 
 /* Count errors detected in flag processing. */
 unsigned flag_errors = 0;
+static unsigned long pre_process_fail_count = 0;
 
 const char*basedir = strdup(".");
 
@@ -1161,6 +1162,12 @@ int main(int argc, char*argv[])
 	    return rc;
       }
 
+      if (pre_process_fail_count) {
+	    cerr << "Preprocessor failed with " << pre_process_fail_count
+	         << " errors." << endl;
+	    return pre_process_fail_count;
+      }
+
 
 	/* If the user did not give specific module(s) to start with,
 	   then look for modules that are not instantiated anywhere.  */
@@ -1407,3 +1414,14 @@ static void find_module_mention(map<perm_string,bool>&check_map, PGenerate*schm)
 	    find_module_mention(check_map, *cur);
       }
 }
+
+void pre_process_failed(const char*text)
+{
+      const char*num_start = strchr(text, '(') + 1;
+      unsigned long res;
+      char*rem;
+      res = strtoul(num_start, &rem, 10);
+      assert(res > 0);
+      assert(rem[0] == ')');
+      pre_process_fail_count += res;
+}