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RE: File size for arm-elf-gcc


What you might want to look at is to reduce the file size, not with GCC but
since you are using ELF Format
 you might be able to do some ELF tweakin and reduce the object file size,
pls refer to
http://www.muppetlabs.com/~breadbox/software/tiny/teensy.html

Hope this helps
Danny


-----Original Message-----
From: David Mc Kenna [mailto:mckennad@esatclear.ie]
Sent: Friday, August 02, 2002 2:12 PM
To: Daniel Ezekiel; 'mckennad@esatclear.ie'; crossgcc@sources.redhat.com
Subject: RE: File size for arm-elf-gcc


Using gcc -s file.c successfully reduces the elf file to ~44k. But when I
convert
this into Intel Hex, for ease of use, it still is ~28k. Is there any way to
reduce this size?

Also when I added the option -Wl,-t it caused gcc to crash out,

/c/win/arm/bin/../lib/gcc-lib/arm-elf/3.1.1/../../../../arm-elf/bin/ld:
warning:
connot find thumb start symbol
/c/win/arm/bin/../lib/gcc-lib/arm-elf/3.1.1/crti.o

/c/adi/win/arm/bin/../lib/gcc-lib/arm-elf/3.1.1/../../../../arm-elf/lib/crt0
.o:
In function `start':
/c/win/arm/bin/../lib/gcc-lib/arm-elf/3.1.1/../../../../arm-elf/lib/crt0.o(.
text+0xd8):
undefined reference to `_init'
/c/win/arm/bin/../lib/gcc-lib/arm-elf/3.1.1/../../../../arm-elf/lib/crt0.o(.
text+0xf8):
undefined reference to `_fini'
collect2: ld returned 1 exit status

Thanks again,
Dave McKenna
>gcc -s file.c
> generates execs which are stripped
>
>
>-----Original Message-----
>From: David Mc Kenna [mailto:mckennad@esatclear.ie]
>Sent: Thursday, August 01, 2002 7:45 PM
>To: crossgcc@sources.redhat.com
>Subject: File size for arm-elf-gcc
>
>
>Hi all,
>
>Is it possible to reduce the size of files generated by gcc? By default it

>seems
>to be including functions such as malloc,etc. which highly inflates it
size.

>
>
>An example is this simple program:-
>
>int main()
>{
>	int i,j;
>
>	for (i = 0 ; i < 100 ; i++)
>	{
>		j = j + i;
>	}
>	return 0;
>}
>
>When i use the following command it generates an elf file ~ 130K and when
>stripped
>an intel hex file ~28K:-
>
>arm-elf-gcc -O3 cexample.c -o cexample.elf
>arm-elf-strip cexample.elf -o cexample.hex -0 ihex
>
>GCC successfully converts the program to a small Arm assembly program ~300

>bytes,
>but links in extra functions.
>
>Any help is greatly appreciated,
>Thanks,
>Dave McKenna
>--
>http://www.iol.ie
>
>------
>Want more information?  See the CrossGCC FAQ,
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