allow to configure file names for profile reports

src/core/runtime.d

@@ -351,6 +351,28 @@ extern (C) void dmd_coverDestPath(string path);
  */
 extern (C) void dmd_coverSetMerge(bool flag);
 
+/**
+ * Set the output file name for profile reports (-profile switch).
+ * An empty name will set the output to stdout.
+ *
+ * Params:
+ *  name = file name
+ * Note:
+ *  This is a dmd specific setting.
+ */
+extern (C) void trace_setlogfilename(string name);
+
+/**
+ * Set the output file name for the optimized profile linker DEF file (-profile switch).
+ * An empty name will set the output to stdout.
+ *
+ * Params:
+ *  name = file name
+ * Note:
+ *  This is a dmd specific setting.
+ */
+extern (C) void trace_setdeffilename(string name);
+
 /**
  * Set the output file name for memory profile reports (-profile=gc switch).
  * An empty name will set the output to stdout.

src/rt/trace.d

@@ -92,10 +92,9 @@ __gshared
 //      0       success
 //      !=0     failure
 
-int trace_setlogfilename(string name)
+void trace_setlogfilename(string name)
 {
     trace_logfilename = name;
-    return 0;
 }
 
 ////////////////////////////////////////
@@ -105,10 +104,9 @@ int trace_setlogfilename(string name)
 //      0       success
 //      !=0     failure
 
-int trace_setdeffilename(string name)
+void trace_setdeffilename(string name)
 {
     trace_deffilename = name;
-    return 0;
 }
 
 ////////////////////////////////////////
@@ -478,7 +476,8 @@ shared static ~this()
         trace_merge(&groot);
 
         // Report results
-        FILE* fplog = fopen(trace_logfilename.ptr, "w");
+        FILE* fplog = trace_logfilename.length == 0 ? stdout :
+            fopen(trace_logfilename.ptr, "w");
         if (fplog)
         {
             auto nsymbols = trace_report(fplog, groot);
@@ -498,7 +497,8 @@ shared static ~this()
             fprintf(stderr, "cannot write '%s'", trace_logfilename.ptr);
 
         // Output function link order
-        FILE* fpdef = fopen(trace_deffilename.ptr,"w");
+        FILE* fpdef = trace_deffilename.length == 0 ? stdout :
+            fopen(trace_deffilename.ptr, "w");
         if (fpdef)
         {
             fprintf(fpdef,"\nFUNCTIONS\n");