Compiling CygWin ARM GCC and GCJ cross compiler

[Øyvind Harboe <oyvind dot harboe at zylin dot com>]

Its kinda embarassing to answer my own questions.


It appears I was indeed missing the --with-newlib=yes when I got 
into difficulties with NO_GETUID not being defined.


I now have a arm-elf-* compiler built that I'll be investigating more tomorrow.


Initially the size seemed to be ~1.5MB for hello world, which
seems to be similar to what others reported. Any resources on 
how to best configure the compiler to reduce footprint
would be welcome.


Here are my initial results:

public class Hello
{
   static public void main(String[] args)
    {
        System.out.println("hello world!\n");
    }
}

arm-elf-gcj -g -o test --main=Hello Hello.java


$ arm-elf-objdump --headers test
test:     file format elf32-littlearm
Sections:
Idx Name          Size      VMA       LMA       File off  Algn
  0 .init         0000001c  00008000  00008000  00008000  2**2
                  CONTENTS, ALLOC, LOAD, READONLY, CODE
  1 .text         000ed654  0000801c  0000801c  0000801c  2**2
                  CONTENTS, ALLOC, LOAD, READONLY, CODE
  2 .fini         00000018  000f5670  000f5670  000f5670  2**2
                  CONTENTS, ALLOC, LOAD, READONLY, CODE
  3 .rodata       000383c4  000f5688  000f5688  000f5688  2**2
                  CONTENTS, ALLOC, LOAD, READONLY, DATA
  4 .data         0003ecc0  0012db4c  0012db4c  0012db4c  2**2
                  CONTENTS, ALLOC, LOAD, DATA
  5 .eh_frame     00000004  0016c80c  0016c80c  0016c80c  2**2
                  CONTENTS, ALLOC, LOAD, READONLY, DATA
  6 .gcc_except_table 00001dc0  0016c810  0016c810  0016c810  2**2
                  CONTENTS, ALLOC, LOAD, READONLY, DATA
  7 .ctors        0000000c  0016e5d0  0016e5d0  0016e5d0  2**2
                  CONTENTS, ALLOC, LOAD, DATA
  8 .dtors        00000008  0016e5dc  0016e5dc  0016e5dc  2**2
                  CONTENTS, ALLOC, LOAD, DATA
  9 .jcr          0000081c  0016e5e4  0016e5e4  0016e5e4  2**2
                  CONTENTS, ALLOC, LOAD, DATA
 10 .sbss         00000000  0016ee00  0016ee00  0016ee00  2**0
                  CONTENTS
 11 .bss          0000d284  0016ee00  0016ee00  0016ee00  2**5
                  ALLOC
 12 .comment      00006244  00000000  00000000  0016ee00  2**0
                  CONTENTS, READONLY
 13 .debug_aranges 00004c78  00000000  00000000  00175048  2**3
                  CONTENTS, READONLY, DEBUGGING
 14 .debug_pubnames 0003a87e  00000000  00000000  00179cc0  2**0
                  CONTENTS, READONLY, DEBUGGING
 15 .debug_info   005d5583  00000000  00000000  001b453e  2**0
                  CONTENTS, READONLY, DEBUGGING
 16 .debug_abbrev 0007cdab  00000000  00000000  00789ac1  2**0
                  CONTENTS, READONLY, DEBUGGING
 17 .debug_line   0006c4bc  00000000  00000000  0080686c  2**0
                  CONTENTS, READONLY, DEBUGGING
 18 .debug_frame  000302d0  00000000  00000000  00872d28  2**2
                  CONTENTS, READONLY, DEBUGGING
 19 .debug_str    000a0a80  00000000  00000000  008a2ff8  2**0
                  CONTENTS, READONLY, DEBUGGING
 20 .stack        00000000  00080000  00080000  00943a78  2**0
                  CONTENTS
 21 .debug_ranges 0000d780  00000000  00000000  00943a78  2**0
                  CONTENTS, READONLY, DEBUGGING


$ arm-elf-gdb test
GNU gdb 5.3
Copyright 2002 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for details.
This GDB was configured as "--host=i686-pc-cygwin --target=arm-elf"...
(gdb) load
You can't do that when your target is `exec'
(gdb) target sim
Connected to the simulator.
(gdb) load
Loading section .init, size 0x1c vma 0x8000
Loading section .text, size 0xed654 vma 0x801c
Loading section .fini, size 0x18 vma 0xf5670
Loading section .rodata, size 0x383c4 vma 0xf5688
Loading section .data, size 0x3ecc0 vma 0x12db4c
Loading section .eh_frame, size 0x4 vma 0x16c80c
Loading section .gcc_except_table, size 0x1dc0 vma 0x16c810
Loading section .ctors, size 0xc vma 0x16e5d0
Loading section .dtors, size 0x8 vma 0x16e5dc
Loading section .jcr, size 0x81c vma 0x16e5e4
Start address 0x811c
Transfer rate: 11757568 bits in <1 sec.
(gdb) run
Starting program: /home/oharboe/gcc33/test/test
hello world!

Program exited normally.
[Switching to process 0]
(gdb) quit





Øyvind