From: Ulf Samuelsson <ulf@atmel.com>
To: u-boot@lists.denx.de
Subject: [U-Boot-Users] software FP yada yada yada
Date: Thu, 12 Oct 2006 22:49:25 +0200 [thread overview]
Message-ID: <011f01c6ee45$0eefaba0$0d68fe51@atmel.com> (raw)
In-Reply-To: 20061012203005.DB047353BDE@atlas.denx.de
> In message <131AF8573CF31945B5B11E4201D3F1E142BA28@mail3.Avidyne.com> you wrote:
>>
>> When I got 1.1.4, I get the infamous message about how u-boot needs a
>> software FP whereas my gcc is set up for hardware fp.
>>
>> What I would LIKE to know is why 1.1.2 builds just fine but 1.1.4 does
>> not.
>
> There have been so many changes between 1.1.2 and 1.1.4 that it's
> difficult to tell which specific change causes the problem, but if
> you check the "make" output you can clearly see where the problem is
> coming from - your compiler fails to provide the required softfloat
> routines. Which is kind of funny, since there are not so many ARM
> systems with FPU around.
>
According to the crosstool documentation at www.kegel.com:
Most combinations of gcc 3.x.x and binutils fails when you try to build a softfloat toolchain
All tested combinations of gcc-4.x.x and binutils fails if softfloat is enabled.
If you want to use gcc 4, you cannot build u-boot as is.
> My recommendation is to fix the toolchain
IIRC, An file included by the top makefile defines CFLAGS to include -msoftfloat.
Removing -msoftfloat from CFLAGS allows you to build U-boot with your normal compiler.
I did that, and u-boot 1.1.4 compiled fine after that.
Personally, I think -msoftfloat should be optional.
Before Wolfgang start complaining about bloat, I'd like to point
out that due to segment boundaries in the AT45DB642D
a total of 256 kB is av ailable for the dataflashboot, u.boot and
u-boot environment and it is meaningless to save a byte here and there.
It is worth 10s of kB to be able to use a single toolchain to build
u-.boot, Linux and filesystem
.
> Best regards,
>
> Wolfgang Denk
>
> --
Best Regards
Ulf Samuelsson
next prev parent reply other threads:[~2006-10-12 20:49 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-10-12 20:00 [U-Boot-Users] software FP yada yada yada Matt Gessner
2006-10-12 20:30 ` Wolfgang Denk
2006-10-12 20:49 ` Ulf Samuelsson [this message]
2006-10-12 21:35 ` Brent Cook
2006-10-12 21:44 ` Ulf Samuelsson
2006-10-12 21:57 ` Brent Cook
2006-10-12 21:48 ` Leonid
2006-10-12 23:16 ` Wolfgang Denk
2006-10-13 4:44 ` Ulf Samuelsson
2006-10-13 7:54 ` Robert Schwebel
-- strict thread matches above, loose matches on Subject: below --
2006-10-12 20:32 Matt Gessner
2006-10-12 21:02 ` Wolfgang Denk
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