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RE: i can't use math func log()

From: "Dave Korn" <dave dot korn at artimi dot com>
To: "'yan xiaotian'" <xiaotian dot yan at gmail dot com>, <crossgcc at sourceware dot org>
Date: Thu, 30 Nov 2006 15:45:41 -0000
Subject: RE: i can't use math func log()

On 30 November 2006 07:56, yan xiaotian wrote:

> about 1): s3c2410 doesn't have fpu
> about 2): how to know the configuration for floating point?
> 
> thanx~!
> 
>            best
>                                         Alex Y

  Heh, calm down!  Once is enough!

  The way to find out the configuration is any of:

1)  Use "objdump" with the '-d' flag and look at the compiled code to see if
FPU instructions are used.
2)  Add the "--save-temps" flag to gcc when compiling and look at the .S file
generated to see if it has FPU instructions.
3)  Run "gcc -v" to see the options with which gcc was configured.

  If it does turn out to be making floating point instructions, you can try
using the "-msoft-float" flag.

    cheers,
      DaveK
-- 
Can't think of a witty .sigline today....

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