File size increases significantly after objcopy

[Peter Barada]

>  I am building colilo for a coldfire (v4e) target. I am facing a strange
>problem. If i build colilo with -O0 option and convert the ELF binary to
>bnary, srec format following are the resulting file sizes
>
>-rwxr-xr-x    1 cjaiprakash coldfire      93K Nov 25 18:58 colilo.bin
>-rwxr-xr-x    1 cjaiprakash coldfire     123K Nov 25 18:58 colilo.elf
>-rw-r--r--    1 cjaiprakash coldfire     279K Nov 25 18:58 colilo.s19
>-rw-r--r--    1 cjaiprakash coldfire     279K Nov 25 18:58 colilo.srec
>
>But when i build the colilo with -O2 option file size increase
>significantly, following are the sizes
>-rwxr-xr-x    1 cjaiprakash coldfire      17M Nov 25 19:01 colilo.bin
>-rwxr-xr-x    1 cjaiprakash coldfire     107K Nov 25 19:01 colilo.elf
>-rw-r--r--    1 cjaiprakash coldfire      49M Nov 25 19:01 colilo.s19
>-rw-r--r--    1 cjaiprakash coldfire      49M Nov 25 19:01 colilo.srec
> 
>ELF binary size is ok but why the file sizes for bin, srec are so huge? 

Two things.
1) Build link map so you can see what got sucked into the link.
2) Dump the object header (onjdump -h) and see what sections are in
   colilo.elf.  I'll bet in the -O2 case there are one or more *extra*
   sections that are getting linked to zero since the linker control file
   didn't specify where they are suppoesed to go.

-- 
Peter Barada
peter@the-baradas.com