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Re: ld includes entire archive (.a) when compiling .elf file
- From: Daniel Jacobowitz <drow at false dot org>
- To: Josh Keller <jkeller at keytechinc dot com>
- Cc: binutils at sourceware dot org, Reuben Johnston <rjohnston at keytechinc dot com>
- Date: Fri, 10 Mar 2006 18:02:10 -0500
- Subject: Re: ld includes entire archive (.a) when compiling .elf file
- References: <E736F3E26DE59146A2343541510255B56D22A5@mercury.keytechinc.com>
On Fri, Mar 10, 2006 at 05:59:32PM -0500, Josh Keller wrote:
> Building with --gc-sections ends up giving me a 0-byte binary. It seems
> to think all my code is garbage (See below) ;) I'm guessing that I have
> to subdivide my code somehow to tell it what to remove, etc.
>
> I turned on the -f options and got the following error:
> /usr/local/gnu/lib/gcc-lib/arm-elf/3.3/../../../../arm-elf/bin/ld: -f
> may not be used without -shared.
Then obviously you've passed it the wrong options... ah,
-ffunction-sections is not a linker option, it's a compiler option, so
no -Wl.
> Output from my compiler...
>
> arm-elf-gcc Cstartup.o main.o Cstartup_SAM7.o irq.o pio.o
> interrupt_pit.o interrupt_Usart.o --output main.elf -nostartfiles
> -Wl,-Map=main.map,--cref,--gc-sections -Iucos_ii -Lucos_ii -lucos_ii
> -TAT91SAM7S64-ROM.ld
Try using the linker option -e to specify the function at the start of
execution.
--
Daniel Jacobowitz
CodeSourcery