lib/signals: fix for nitg-g

Signed-off-by: Alexis Laferrière <alexis.laf@xymus.net>

diff --git a/lib/signals.nit b/lib/signals.nit
index cb69dd7..89f4a1b 100644 (file)
--- a/lib/signals.nit
+++ b/lib/signals.nit
@@ -24,6 +24,21 @@ module signals
        #include <stdio.h>
 
        /*
+               This guard prevents errors by the C compiler when the Nit code imports this
+               module but do not use handle_signal. When it is _not_ used, the C type
+               SignalHandler and C function SignalHandler_receive_signal are not generated.
+               Which does not please the C compiler. This guard ensure that we compile this
+               code only if the type SignalHandler has been defined.
+
+               This is a HACK, FIXME by:
+               * Adding the macro to the FFI spec, or
+               * Attach the callbacks to this code block (or the module itself)
+               * Avoid using Nit types and callbacks or use them only in the C implementation
+                 of Nit method.
+       */
+       #ifdef NIT_TYPE_SignalHandler
+
+       /*
                Structure to manage each possible signals
                are used in an array of 32 maximum signals.
                This array is global to the software.
@@ -49,6 +64,8 @@ module signals
                        }
                }
        }
+
+       #endif
 `}
 
 # Receives the callback from system when a given signal arise