Re: [Mingw-w64-public] Native x86_64-w64-mingw32 toolchain including ada

[Nicolas B. <Nic...@ma...>]

Hi Rainer,

We apparently have been facing the same issue on the same day...

Though I cannot really explain where it comes from exactly (and how I got there), I visited the following link:
http://gcc.gnu.org/ml/gcc-patches/2010-10/msg01982.html
and adapted the information in there to write the following patch (it is for gcc-4.6.1, not 4.6.2 but the file should be the same):
--- gcc-4.6.1.orig/gcc/ada/gcc-interface/Makefile.in    2011-08-12 17:25:16.000000000 +0200
+++ gcc-4.6.1/gcc/ada/gcc-interface/Makefile.in         2011-02-08 23:55:57.000000000 +0100
@@ -1641,11 +1641,13 @@
       else
        LIBGNAT_TARGET_PAIRS += \
          system.ads<system-mingw-x86_64.ads
+       EH_MECHANISM=-gcc
       endif
     else
       ifeq ($(strip $(MULTISUBDIR)),/64)
        LIBGNAT_TARGET_PAIRS += \
          system.ads<system-mingw-x86_64.ads
+       EH_MECHANISM=-gcc
       else
        LIBGNAT_TARGET_PAIRS += \
          system.ads<system-mingw.ads

It solved the problem for me and, at least on a few small samples, the exceptions appear to be correctly handled.

Note that you will have to apply the patch and rebuild the cross toolchain before being able to build the native toolchain.

Best regards

Nicolas