Added "yosys -L logfile"

diff --git a/kernel/driver.cc b/kernel/driver.cc
index e95ef48d388932a1f4a220fe08a1dcc6c5f6ab0b..116df542ca63617929495892bddce96cdd2efa67 100644 (file)
--- a/kernel/driver.cc
+++ b/kernel/driver.cc
@@ -127,6 +127,9 @@ int main(int argc, char **argv)
                printf("    -l logfile\n");
                printf("        write log messages to the specified file\n");
                printf("\n");
+               printf("    -L logfile\n");
+               printf("        like -l but open log file in line buffered mode\n");
+               printf("\n");
                printf("    -o outfile\n");
                printf("        write the design to the specified file on exit\n");
                printf("\n");
@@ -183,7 +186,7 @@ int main(int argc, char **argv)
        }
 
        int opt;
-       while ((opt = getopt(argc, argv, "MXAQTVSm:f:Hh:b:o:p:l:qv:tds:c:")) != -1)
+       while ((opt = getopt(argc, argv, "MXAQTVSm:f:Hh:b:o:p:l:L:qv:tds:c:")) != -1)
        {
                switch (opt)
                {
@@ -231,11 +234,14 @@ int main(int argc, char **argv)
                        got_output_filename = true;
                        break;
                case 'l':
+               case 'L':
                        log_files.push_back(fopen(optarg, "wt"));
                        if (log_files.back() == NULL) {
                                fprintf(stderr, "Can't open log file `%s' for writing!\n", optarg);
                                exit(1);
                        }
+                       if (opt == 'L')
+                               setvbuf(log_files.back(), NULL, _IOLBF, 0);
                        break;
                case 'q':
                        mode_q = true;