Jonsba/master (#100)

* Add a --unbuffered option for simulation. It disables buffering for stdout, stderr and files opened in write or append mode (TEXTIO).

Fixes #87 

* Some simplifications made on the previous commit. Documentation added for --unbuffered in Simulation_and_runtime.rst.

* Some more simplifications on unbuffered writes support for TEXTIO

* Fix a style issue failure reported by Travis-CI

1 files changed, 5 insertions, 0 deletions

diff --git a/src/grt/grt-options.adb b/src/grt/grt-options.adb
index 81fa962f0..943ff9626 100644
--- a/src/grt/grt-options.adb
+++ b/src/grt/grt-options.adb
@@ -25,6 +25,7 @@
 with Interfaces; use Interfaces;
 with Grt.Strings; use Grt.Strings;
 with Grt.Errors; use Grt.Errors;
+with Grt.Stdio; use Grt.Stdio;
 with Grt.Astdio;
 with Grt.Hooks;
 
@@ -477,6 +478,10 @@ package body Grt.Options is
             end if;
             Last_Generic_Override := Over;
          end;
+      elsif Option = "--unbuffered" then
+         Unbuffered_Writes := True;
+         setbuf (stdout, NULL_voids);
+         setbuf (stderr, NULL_voids);
       elsif not Grt.Hooks.Call_Option_Hooks (Option) then
          Error_C ("unknown option '");
          Error_C (Option);