After a bit of struggle figured out how to do time. So dumb that somethign so simple is so hard.

PPP3/Makefile

@@ -1,5 +1,7 @@
-
 all:
+	meson compile -C . 2>&1 | ../builddir/goc
+
+build:
 	meson compile -C .
 
 test:

PPP3/goc.cpp

@@ -1,8 +1,10 @@
 #include <iostream>
+#include <fstream>
 #include <fmt/core.h>
 #include <regex>
 #include <string>
 #include <iterator>
+#include <ctime>
 
 using namespace std;
 using namespace fmt;
@@ -11,21 +13,26 @@ int main()
 {
   regex err_re("(.*?):([0-9]+):([0-9]+):\\s*(.*?):\\s*(.*)");
   string line;
-  smatch err_match;
+  smatch err;
+  ofstream stats_out;
+  stats_out.open("stats.csv", ios::out | ios::app);
+  auto t = time(nullptr);
+  auto tm = *std::gmtime(&t);
 
   while(getline(cin, line)) {
     print("{}\n", line);
-    if(regex_match(line, err_match, err_re)) {
-      string file_name = err_match[1].str();
-      string line = err_match[2].str();
-      string col = err_match[3].str();
-      string type = err_match[4].str();
-      string message = err_match[5].str();
+    if(regex_match(line, err, err_re)) {
+      string file_name = err[1].str();
+      string line = err[2].str();
+      string col = err[3].str();
+      string type = err[4].str();
+      string message = err[5].str();
 
-      print("{},{},{},{},{}\n",
-          file_name, line, col, type, message);
+      stats_out << put_time(&tm, "%FT%TZ");
+      stats_out << format(",{},{},{},{},{}\n", file_name, line, col, type, message);
     }
   }
 
+  stats_out.close();
   return 0;
 }