Trouble with LD (unknown option: -T)

[osdf_1]

Hi, I'm trying to use a linker script with ld, and I was told that the '-T' option was used to provide one. But when I tried it I got an error saying that the '-T' option doesn't exist. Here's what I did:

>ld -T link.ld -o kernel.bin start.o

And here's what I got:

ld: unknown option: -T

So how can I provide a linker script?
BTW I'm using a Leopard iMac

[Zenith]

Very strange...

First, try doing -Tlink.ld instead of -T link.ld (it might work...). Also check that link.ld actually exists.

If that doesn't work, do ld --help and see if the -T option is listed. If it isn't, get a different/newer linker.

Then do ld --version and give us the output.

Hope this helps!

[osdf_1]

I got:

ld: unknown option: -Tlinker.ld

when using:

> ld -Tlinker.ld -o kernel.bin start.o

and:

ld: unknown option: --version

when using:
> ld --version

I also checked and linker.ld does exist. What should I do?

Oh, and:

>ld -v

outputs:

@(#)PROGRAM:ld PROJECT:ld64-84.3

[Alboin]

Try 'ld -v', and if not, 'man ld'.

[osdf_1]

>ld -v

outputs:

@(#)PROGRAM:ld PROJECT:ld64-84.3

And I couldn't find -T in the man page.

[Zenith]

You're not using GNU ld, you're using something else... I'm assuming this is the linker that came with Leopard? Apple should know better .

Download and compile the latest GNU binutils, which should have modern, functional copies of ld, as, objdump, and other goodies. They may also have a binary distribution for Mac, if you have trouble with compilation...

[thepowersgang]

Try using the long version of the script command --script that might work.

If not run

Code: Select all

ld --help

and try to find the script option.

[osdf_1]

Well I couldn't install GNU binutils, so I looked up the equivalent for -T, which is -exported_symbols_list (I think). But I think the script file should be written differently. Here's what I did:

> ld -exported_symbols_list linker -arch i386 -o kernel.bin start.o

And I got:

Code: Select all

ld warning: in start.o, file is not of required architecture
Undefined symbols:
  "ENTRY(start)", referenced from:
     -exported_symbols_list command line option
  ".bss : AT(phys + (bss - code))", referenced from:
     -exported_symbols_list command line option
  "code = .;", referenced from:
     -exported_symbols_list command line option
  "end = .;", referenced from:
     -exported_symbols_list command line option
  "OUTPUT_FORMAT("binary")", referenced from:
     -exported_symbols_list command line option
  ".data : AT(phys + (data - code))", referenced from:
     -exported_symbols_list command line option
  "{", referenced from:
     -exported_symbols_list command line option
  "}", referenced from:
     -exported_symbols_list command line option
  ".text phys : AT(phys) {", referenced from:
     -exported_symbols_list command line option
  "bss = .;", referenced from:
     -exported_symbols_list command line option
  "SECTIONS", referenced from:
     -exported_symbols_list command line option
  "data = .;", referenced from:
     -exported_symbols_list command line option
  "phys = 0x00100000;", referenced from:
     -exported_symbols_list command line option
  ". = ALIGN(4096);", referenced from:
     -exported_symbols_list command line option
ld: symbol(s) not found

Here's my script, anyone knows what would be Apple ld's equivalent?

Code: Select all

OUTPUT_FORMAT("binary")
ENTRY(start)
phys = 0x00100000;
SECTIONS
{
  .text phys : AT(phys) {
    code = .;
    *(.text)
    *(.rodata)
    . = ALIGN(4096);
  }
  .data : AT(phys + (data - code))
  {
    data = .;
    *(.data)
    . = ALIGN(4096);
  }
  .bss : AT(phys + (bss - code))
  {
    bss = .;
    *(.bss)
    . = ALIGN(4096);
  }
  end = .;
}

[JamesM]

Apple use their own toolchain that only has loose compatibility with the GNU tools. Given the bug I found in their assembler's lexer the other week I wouldn't trust that toolchain as far as I could throw it.

You can get the GNU tools at ftp://ftp.gnu.org.

[Combuster]

Or preferrably, GCC Cross-Compiler