[Bug 1001468] eCos GNU tools 4.6.2

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--- Comment #30 from Ilija Kocho <ilijak@siva.com.mk> 2012-03-10 23:46:14 GMT ---
Another serious bug in GCC 4.6.2

I have started playing with Cortex-M4 Floating Point Unit and found out that
conversion between float and double doesn't work when hardware floating point
is on: -mcpu=cortex-m4 -mfloat-abi=hard -mfpu=fpv4-sp-d16

For instance:

{
     double dbl;
     float flo;

    //.....
     dbl = flo;
    // dbl is rubish
}

It is due to wrong helper library and seem to be the following bug:
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51835

I tried GCC 4.6.3 and it seems to work. I'll do some more tests but IMO we
should start considering of replacing current 4.6.2-20120125 test release with
something newer, possibly 4.6.3. Building of 4.6.3, as noted by Sergei
(comment# 25), is quite straight-forward - I just applied the 4.6.2 patches.

Of course, until this is resolved nothing can stop us from hunting warnings
with current test release.

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