[arm-gnu] Issue in codesourcery (2009q3-67) on cortex a-9

[Kai Ruottu]

14.4.2010 13:58, trisha yad kirjoitti:
> Hi,
>
> I made a very simple program
>
> #include<stdio.h>
> int main()
> {
> float a=2.3;
> printf("%f",a);
> }
>
> and compile with
> arm-none-linux-gnueabi-gcc -mfloat-abi=softfp -mfpu=vfpv3-d16
> -mcpu=cortex-a9 test.c
>
> and I got Illegal instruction.

 From what?  From the previous simple program, from the
'printf()' function in the prebuilt C library or what?

When using a prebuilt toolchain one must make sure that
it provides a suitable C library for the target CPU. If
the optimal compiler switches would be the :

-mfloat-abi=softfp -mfpu=vfpv3-d16 -mcpu=cortex-a9

then one should use these already when compiling the C
library routines. Who made the C library, probably made
it for some totally different CPU variation :(

So please find out which ARM CPUs the CodeSourcery
toolchain will support in its prebuilt C libraries!

A quick look at the "Getting Started" for the "Lite"
told that the following two multilibs were provided :

1. for '-march=armv4t'

2. for '-mthumb -march=armv7-a'