Re: [Mspgcc-users] MSPGCC Code Size vs IAR

[Adam F. <ada...@br...>]

As a followup...

I have also compiled without:

-fdata-sections -ffunction-sections and linked with --no-keep-memory
-Wl,-gc-sections

Having them on seems to make the code slightly smaller, but not much.

adam
On 05/16/2012 10:14 AM, Adam Ford wrote:
> I'm sorry for bugging people, and I have Googled this question, but the
> answers I'm finding are really old and I know there are updates to
> mspgcc since most of the answers were posted....
>
> I am trying to port 3 different programs from IAR to MSPGCC for work.
> I'm using the latest released version, but 2 of the 3 won't fit even
> when compiling using optimizations: -mmcu=$(MCU) -g -Os -Wall
> -fdata-sections -ffunction-sections  and linked with --no-keep-memory
> -Wl,-gc-sections
>
> Does anyone have any ideas how I can further optimize the compiler
> (other than rewriting - which I've been trying to do)?
>
> With an MSP430F149 processor, under IAR, the code compiles and links
> (Code = 45858, data = 3000, CONST=4935)
>
> Under GCC, it won't link because '.rodata won't fit into region rom' and
> rom overflows by 796 bytes.
>
> Examining the Map file shows .rodata is 0x1a66 in size, .text is 0xc240
> in size, .bss is 0x712
>
> Any ideas how to make the libraries or optimizer make smaller code?
>
> adam
>
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