RE: How to test win32->PowerPC(860) cross complier

[Mohammad Saleem <mohammad_saleem_1999 at yahoo dot com>]

Hi Jan,

Thanks for your reply.
I am tryging to understand the *.exe files produced 
by cross- compilation process.

I have a question regarding this.
I see there are two variants certain executable file
under two catalgues like, once catalogue containing:
C:\cygwin\usr\local\powerpc-unknown-eabi\bin
**************************
ar.exe
as.exe
gcc.exe
ld.exe
nm.exe
ranlib.exe
strip.exe
*********************************

and the other one
/usr/local/bin  containging the following files:

*********************************
cpp.exe
gcov.exe
powerpc-unknown-eabi-addr2line.exe
powerpc-unknown-eabi-ar.exe
powerpc-unknown-eabi-as.exe
powerpc-unknown-eabi-c++.exe
powerpc-unknown-eabi-c++filt.exe
powerpc-unknown-eabi-g++.exe
powerpc-unknown-eabi-gasp.exe
powerpc-unknown-eabi-gcc.exe
powerpc-unknown-eabi-ld.exe
powerpc-unknown-eabi-nm.exe
powerpc-unknown-eabi-objcopy.exe
powerpc-unknown-eabi-objdump.exe
powerpc-unknown-eabi-protoize.exe
powerpc-unknown-eabi-ranlib.exe
powerpc-unknown-eabi-readelf.exe
powerpc-unknown-eabi-size.exe
powerpc-unknown-eabi-strings.exe
powerpc-unknown-eabi-strip.exe
powerpc-unknown-eabi-unprotoize.exe

****************************************

As you see as, ld , gcc are found in both catalogue
with only the differnce of prefix
powerpc-unknown-eabi.
What is the differnce between these two variants.

thanks 

/Mohammmad


--- Vermeulen Jan <Jan.Vermeulen@siemens.atea.be>
wrote:
> Hello again Mohammed.
> 
> Glad to see that you managed to build the cross
> tools :)
> 
> <...>
> 
> >
> >and as a resutl of this I got the following files
> >under
> >/usr/local/powerpc-unknown-eabi/bin :
> >*********************************
> >total 8597
> >-rwxr-xr-x    2 Administ None      1150092 Sep  2
> >12:08 ar.exe
> >-rwxr-xr-x    2 Administ None      1714881 Sep  2
> >12:09 as.exe
> >-rw-r--r--    1 Administ None            0 Sep  2
> >2001 files.txt
> >-rwxr-xr-x    1 Administ None       190088 Sep  2
> >12:37 gcc.exe
> >-rwxr-xr-x    2 Administ None      1701451 Sep  2
> >12:09 ld.exe
> >-rwxr-xr-x    2 Administ None      1252422 Sep  2
> >12:08 nm.exe
> >-rwxr-xr-x    2 Administ None      1150604 Sep  2
> >12:08 ranlib.exe
> >-rwxr-xr-x    2 Administ None      1640233 Sep  2
> >12:08 strip.exe
>
>*******************************************************
> >Now I want the cross compiler to produce code for
> >powerPC860.
> >
> >I have built compiler for powerpc-unknown-eabi.
> >First, I don,t know how to tell the gcc to produce
> >code for powerPC860.
> 
> You should also find 
> "powerpc-unknown-eabi-<something>" under
> /usr/local/bin directory.
> 
> with <something> being:
> as
> ld
> gcc
> c++
> and a whole lot more.
> 
> 
> >If I try to compile a simple hello world
> application
> >
> >I get the following error message:
> 
> <snip of errors>
> 
> GCC is your native compiler (to produce windows
> executables in your case, as
> you are using cygwin).
> If you wish to compile for another target, you have
> to say :
> 
> [your prompt]$ powerpc-unknown-eabi-gcc -o test
> test.c
> 
> >If I try:
> >$ gcc.exe test.c -o -mcpu=860 hello.elf 2>&1 | tee
> >hello.log
> >gcc.exe: hello.elf: No such file or directory
> 
> Please read the GCC manual on how to write a valid
> commandline :)
> (see gcc.gnu.org)
> 
> The right syntax is: (as far as i know)
> $ gcc.exe <general options> -o <your compiled
> exe-file> <your c file(s)>
> so you get:
> $ gcc.exe -O2 -o test.exe test.c
> to compile test.c into a "test.exe" program running
> on your windows.
> (-O2 is for optimisation)
> 
> what you are trying to do, is let the native GCC
> choose the back-end.
> I do this the following way:
> (mind you that i'm using the real thing: a *nix
> machine (linux in this
> case), so I don't know if the same applies to
> cygwin)
> 
> i go into the /usr/lib/gcc-lib and I do:
> $ ln -s /usr/local/lib/gcc-lib/powerpc-unknown-eabi/
> ./powerpc-unknown-eabi/
> 
> If I want to choose between crosscompilers, I simply
> do a :
> $ gcc -b m68k-coff -m68040 -o test.exe test.c
> for my m68040 board
> or
> $ gcc -b xscale-elf -o test.exe test.c
> for my xscale board
> or
> $ gcc -b powerpc-unknown-eabi -o test.exe test.c
> for your case.
> 
> 
> Best regards,
> Jan
> 
> ---
> "The only way to accellerate a winnt server is at
> 9.81 m/s^2"
> 
> ------
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> 


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