[SOLVED] Relocatable linking on x86-64 for i386

Valery Reznic · 04-04-2011, 02:13 AM

Hello. I am trying to make relocatable linking on x86-64 box for objects in format i386

Naive

Code:

ld -r file1.o file2.o -o output.o
ld: Relocatable linking with relocations from format elf32-i386 (file1.o) to format elf64-x86-64 (output.o) is not supported

doesn't work.

But even when I add --oformat situation not improved:

Code:

ld --output-format elf32-i386 -r file1.o file2.o -o output.o
ld: Relocatable linking with relocations from format elf32-i386 (file1.o) to format elf32-i386 (output.o) is not supported

So linker correctly recognize what input and output format should be,
but for some reason don't want do it.

Do you have any ideas if it can be done at all and how?

Thanks.
Valery

johnsfine · 04-04-2011, 06:23 AM

Quote:

Originally Posted by Valery Reznic

But even when I add --oformat situation not improved:

Code:

ld --output-format elf32-i386 -r file1.o file2.o -o output.o
ld: Relocatable linking with relocations from format elf32-i386 (file1.o) to format elf32-i386 (output.o) is not supported

I believe the correct option is -m elf_i386

I have no idea how to get information like that from the various ld documentation I have read. I have searched that documentation many times trying to answer questions that simple and failed.

I got that one by using the command gcc -v -m32 test.c

That causes gcc to compile and link the indicated program for 32 bit, and to show you the commands used for each operation, including the ld command.

Valery Reznic · 04-04-2011, 06:34 AM

Quote:

Originally Posted by johnsfine

I believe the correct option is -m elf_i386

I have no idea how to get information like that from the various ld documentation I have read. I have searched that documentation many times trying to answer questions that simple and failed.

I got that one by using the command gcc -v -m32 test.c

That causes gcc to compile and link the indicated program for 32 bit, and to show you the commands used for each operation, including the ld command.

Thank you. It solved problem