Hi Haavard,
On Fri, Jun 13, 2008 at 1:44 AM, Haavard Skinnemoen haavard.skinnemoen@atmel.com wrote:
"Ben Warren" biggerbadderben@gmail.com wrote:
I propose to wrap both the 'board/$(BOARDDIR)/lib$(BOARD).a' and 'cpu/$(CPU)/lib$(CPU).a' arguments to ld in --whole-module/--no-whole-module in order to accomplish this goal. We definitely don't want to do this across the board because image size will increase quite a bit due to unused code.
You can counter that additional size and more by adding --gc-sections to the linker command line and -ffunction-sections -fdata-sections to gcc. That will probably even get rid of the weak implementation if a strong definition is provided.
There's a catch though -- if your linker script isn't prepared for this, things will break.
Haavard
From what I've read, this --gc-sections thing is pretty new, and lots
of people are using older tools, so that idea has to be thrown out. Fun stuff...
regards, Ben