[Tinycc-devel] tcc as compiler for tccboot

[Sergey Korshunoff]

Hi!
I'm trying to use tcc as CC compiler for usual kernel compilation (2.4.37) i.e.
  cd linux
  make bzImage CC=tcc

Kernel compiles fine, but hangs some time after start. After
Investigating a problem, I got the following difference: a file
mem-2.s (a part of the file drivers/char/mem.c)
.section .initcall.init
    .long chr_dev_init

objdump -Dtsr mem-2.o (compiled by gcc)

mem-2.o:     file format elf32-i386
SYMBOL TABLE:
00000000 l    d  .text<>00000000 .text
00000000 l    d  .data<>00000000 .data
00000000 l    d  .bss<->00000000 .bss
00000000 l    d  .initcall.init>00000000 .initcall.init
00000000         *UND*<>00000000 chr_dev_init
Disassembly of section .initcall.init:
00000000 <.initcall.init>:
   0:<->00 00                <->add    %al,(%eax)
<------><------><------>0: R_386_32<--->chr_dev_init

objdump -Dtsr mem-2.o (compiled by tcc)
mem-2.o:     file format elf32-i386
SYMBOL TABLE:
00000000 l    df *ABS*<>00000000 mem-2.s
00000000         *UND*<>00000000 chr_dev_init
Disassembly of section .initcall.init:
00000000 <.initcall.init>:
   0:<->00 00                <->add    %al,(%eax)
<------><------><------>0: R_386_32<--->chr_dev_init

As you can see, there is only one difference:
in mem-2.o compiled by gcc  we see extra data in symbol table
00000000 l    d  .text<>00000000 .text
00000000 l    d  .data<>00000000 .data
00000000 l    d  .bss<->00000000 .bss
00000000 l    d  .initcall.init>00000000 .initcall.init
Nothing serious. But kernel hangs with mem-2.o compiled by tcc.
May be gnu ld needs that? Is it possible to modify tcc in the way like gcc?