Re: Roll-your-own Toolchain Builds

[Pak Woon <pak.woon@nec.com.au>]

Daniel Stenberg wrote:
> On Tue, 3 Oct 2006, Pak Woon wrote:
> 
>> I am trying to roll-my-own toolchain by following the instructions 
>> outlined in http://www.linux-mips.org/wiki/Toolchains.
> 
> 
>> binutils-2.16.91.0.6-5
>> gcc-4.1.1-1.fc5
> 
> 
> Funny, since that page says that the recommended gcc version is 3.4.4 
> and binutils 2.16.1... (even though I've had no problems with 3.4.6 myself)

First of all, thank you all for your suggestions. I have successfully 
built my own toolchain (using binutils-2.16.1 and gcc-3.4.4). I have 
also successfully built the kernel for the target board. (with git 
checkout linux-2.16.18-stable)

[ltu@PAKW-FEDORA linux.git]$ readelf -h vmlinux
ELF Header:
  Magic:   7f 45 4c 46 01 01 01 00 00 00 00 00 00 00 00 00
  Class:                             ELF32
  Data:                              2's complement, little endian
  Version:                           1 (current)
  OS/ABI:                            UNIX - System V
  ABI Version:                       0
  Type:                              EXEC (Executable file)
  Machine:                           MIPS R3000
  Version:                           0x1
  Entry point address:               0x803c3000
  Start of program headers:          52 (bytes into file)
  Start of section headers:          3056172 (bytes into file)
  Flags:                             0x70001001, noreorder, o32, mips32r2
  Size of this header:               52 (bytes)
  Size of program headers:           32 (bytes)
  Number of program headers:         1
  Size of section headers:           40 (bytes)
  Number of section headers:         34
  Section header string table index: 31

I am now trying to build a simple program with my new toolchain and I've 
come across the "can't find crt1.o" problem again. I am struggling with 
this.

[ltu@PAKW-FEDORA tmp]$ mips-unknown-linux-gnu-gcc -v hello.c
Using built-in specs.
Configured with: ../gcc-3.4.4/configure
--target=mips-unknown-linux-gnu
--prefix=/home/ltu/development/mips-linux-toolchain
--enable-languages=c --without-headers --with-gnu-ld --with-gnu-as
--disable-shared --disable-threads
Thread model: single
gcc version 3.4.4
/home/ltu/development/mips-linux-toolchain/libexec/gcc/mips-unknown-linux-gnu/3.4.4/cc1
-quiet -v hello.c -quiet -dumpbase hello.c -auxbase hello -version -o
/tmp/ccETB2Cl.s
ignoring nonexistent directory
"/home/ltu/development/mips-linux-toolchain/lib/gcc/mips-unknown-linux-gnu/3.4.4/../../../../mips-unknown-linux-gnu/sys-include"
ignoring nonexistent directory
"/home/ltu/development/mips-linux-toolchain/lib/gcc/mips-unknown-linux-gnu/3.4.4/../../../../mips-unknown-linux-gnu/include"
#include "..." search starts here:
#include <...> search starts here:
/home/ltu/development/mips-linux-toolchain/lib/gcc/mips-unknown-linux-gnu/3.4.4/include
End of search list.
GNU C version 3.4.4 (mips-unknown-linux-gnu)
        compiled by GNU C version 4.1.1 20060525 (Red Hat 4.1.1-1).
GGC heuristics: --param ggc-min-expand=64 --param ggc-min-heapsize=64461
hello.c: In function `main':
hello.c:2: warning: return type of 'main' is not `int'
/home/ltu/development/mips-linux-toolchain/lib/gcc/mips-unknown-linux-gnu/3.4.4/../../../../mips-unknown-linux-gnu/bin/as
-EB -no-mdebug -32 -v -KPIC -o /tmp/ccoPzQTv.o /tmp/ccETB2Cl.s
GNU assembler version 2.16.1 (mips-unknown-linux-gnu) using BFD version 
2.16.1
/home/ltu/development/mips-linux-toolchain/libexec/gcc/mips-unknown-linux-gnu/3.4.4/collect2
--eh-frame-hdr -EB -dynamic-linker /lib/ld.so.1 crt1.o crti.o
/home/ltu/development/mips-linux-toolchain/lib/gcc/mips-unknown-linux-gnu/3.4.4/crtbegin.o
-L/home/ltu/development/mips-linux-toolchain/lib/gcc/mips-unknown-linux-gnu/3.4.4
-L/home/ltu/development/mips-linux-toolchain/lib/gcc/mips-unknown-linux-gnu/3.4.4/../../../../mips-unknown-linux-gnu/lib
/tmp/ccoPzQTv.o -lgcc -rpath-link /lib:/usr/lib -lc -lgcc
/home/ltu/development/mips-linux-toolchain/lib/gcc/mips-unknown-linux-gnu/3.4.4/crtend.o
crtn.o
/home/ltu/development/mips-linux-toolchain/lib/gcc/mips-unknown-linux-gnu/3.4.4/../../../../mips-unknown-linux-gnu/bin/ld:
crt1.o: No such file: No such file or directory
collect2: ld returned 1 exit status
[ltu@PAKW-FEDORA tmp]$ echo $PATH
/home/ltu/development/mips-linux-toolchain/bin:/bin:/usr/bin
[ltu@PAKW-FEDORA tmp]$

 From my understanding, to compile code for my MIPS target, I need to 
use mips-unknown-linux-gnu-gcc (which, I assume is the same as 
/mips-linux-toolchain/mips-unknwn-linux-gnu/bin/gcc). I have ensured my 
$PATH is the bare minimum. This is the same problem as I was getting 
when I was trying to build a gcc-4.1.1-1.fc5 based cross compiler. I am 
really stuck.

FYI, my hello.c is:
void main ( void )
{
   volatile int i,j,k;

   i = 2;
   j = 1;
   k = i + j;
}

Thanks in advance

Regards,
Pak