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'
