newbie qustion: how to generate machine code for target thumb?

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1

Hello everyone,

I want to generate machine code for target thumb, so run
with bit code test.bc

llc -march thumb test.bc -filetype obj -o test.o

It doesn’t generate test.o but show a message:

“target doesn’t support generation of this file type!”

What’s wrong?

Thanks

2

Hi Heyu Zhu,

I want to generate machine code for target thumb, so run
with bit code test.bc
llc -march thumb test.bc -filetype obj -o test.o
It doesn't generate test.o but show a message:
"target doesn't support generation of this file type!"

writing object code directly is not supported yet (though it is being worked
on), so for the moment you should not use "-filetype obj". Without this option
llc will generate assembler, which you will need to assemble using an
appropriate assembler.

Best wishes,

Duncan.

3

Hi Duncan,

Is it to say llvm-2.5 has no assembler and linker for target thumb and
llvm-2.5 can only generate assembler file for the time being?

Thanks

2009/11/4, Duncan Sands <baldrick@free.fr>:

4

Hi Heyu Zhu,

Is it to say llvm-2.5 has no assembler and linker for target thumb and
llvm-2.5 can only generate assembler file for the time being?

that's right - you have to use the system assembler and linker.

Best wishes,

Duncan.