Porting From Linux (x86) To Linux (arm)
- Thread starter Grum
- Start date
Arialia
Member
I don't really understand your question :blink:
To port something you need to know the diff between the 2 systems and the impact on the code :
for example to port the jpeglib you need only a support of filesystem <stdio.h> ( fopen ,fread ....) an support of a console ( printf )
it's all
all i needed rewrite to port for the NDS was the makefile to indicate the good target processor ....
and for optimization made some little modifications : put the critical functions in the 'ITCM' of the ARM9 ....
Now for graphics it is more difficult : needs more rewriting ....
To port something you need to know the diff between the 2 systems and the impact on the code :
for example to port the jpeglib you need only a support of filesystem <stdio.h> ( fopen ,fread ....) an support of a console ( printf )
it's all
all i needed rewrite to port for the NDS was the makefile to indicate the good target processor ....
and for optimization made some little modifications : put the critical functions in the 'ITCM' of the ARM9 ....
Now for graphics it is more difficult : needs more rewriting ....
AireTamStorm
Unix Addict
Grum said:
For some software it will generally only require a recompile, others, changing of assembly code, or, writing / modding your own libraries.
The idea is, check and see if all of the code you're working with is in pure C (no assembly) and if the libraries it depends on are also as such. You can replace any necessary code with either straight C or preferably, ARM assembly.
You also have to take into account applications that use specific display routines (Qtopia vs X for instance) and see what the target device supports for output.
After that, you check your development environment, see if you've got all the stuff for cross-compiling. Make sure you can compile ARM, have all of the devel packages for the dependencies and give the compiler a whirl.
Copy it over to your target and try to run it. Don't count on it doing anything the first try, but as long as you can compile the code and get it to run (if only to return an error) you're already off to a great start.
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