[ECOS] A hello world problem

Lewin A.R.W. Edwards larwe@larwe.com
Mon Dec 4 10:13:00 GMT 2000


>Linux. Having said that im supprised to see the DigiOS_ bit. My
>directories are always without such a prefix. Its a long time since i
>read the instructions. Does it suggest you give the ecc config file a
>name such as DigiOS? Mine is always ecos.ecc.

Well, no - the save as dialog specified "Untitled.ecc" and so I typed 
DigiOS. Not a big deal.

>arm-elf-gcc -g -I\ARMDigi\ecos_work\DigiOS_install\include hello.c -L 
>\ARMDigi\ecos_work\DigiOS_install\lib -Ttarget.ld -nostdlib
>
>Note the arm-elf-gcc not gcc. Without that it may still use the native
>compiler.

With your method above, what happens when gcc calls the assembler and 
linker? I guess (or rather worry) that it will just call 'as' or 'ld' and 
then would hit the native ones, which is why I put the /arm-elf/bin dir at 
the head of the path.

Why does the gcc build process make two copies of the tools anyway, with 
different names? (one set in /[host]/bin has names starting with the 
target, eg arm-elf-gcc, the other set is in /[host]/[target]/shortnames, 
e.g. /[host]/arm-elf/gcc). Baffling.

>See if that makes any difference? The other thing to check is the way

The only difference is that this time I can't use the scroll lock key to 
pause the output. Same errors. My command line isn't quite the same as 
yours though, since '/' is not the root directory of the drive. It's the 
same as yours except instead of /ARMDigi it is /c/ARMDigi.

hello.c is just cut and pasted from the tutorial :

#include <stdio.h>
int main(void)
{
printf("test\n");
return 0;
}

>you have the file systems mounted. Some bits have to be mounted text
>mode and other binary. Since i unix with grown up line endings i never

All my mount points are binmode. All my files should have UNIX EOL 
conventions... or what? The docs only talk about being careful that object 
paths are mounted binary, they don't say that certain paths need to be 
textmode!

=== Lewin A.R.W. Edwards (Embedded Engineer)
Work: http://www.digi-frame.com/
Personal: http://www.zws.com/ and http://www.larwe.com/



More information about the Ecos-discuss mailing list