Bug#520351: llvm-gcc-4.2-2.5 fails to build from source on arm: MACHO_DYNAMIC_NO_PIC_P undeclared

[Martin Guy]

This patch get past message#15's error. Now it goes on to build stage2
gcc and dies running genmodes:

build/genmodes -h > tmp-modes.h
/bin/sh: line 1: 15618 Floating point exception
make[4]: *** [s-modes-h] Error 136
make[4]: Leaving directory `/home/martin/arm/llvm-gcc-4.2-2.5/build-gcc/gcc'

The failing program under gdb:

~/arm/llvm-gcc-4.2-2.5/build-gcc/gcc$ gdb build/genmodes
GNU gdb 6.8-debian
...
This GDB was configured as "arm-linux-gnueabi"...
Breakpoint 1 at 0xa58c
Breakpoint 2 at 0xa528
Breakpoint 3 at 0x87ec
Breakpoint 4 at 0x86cc
(gdb) run -h
Starting program:
/home/martin/arm/llvm-gcc-4.2-2.5/build-gcc/gcc/build/genmodes -h

Program received signal SIGFPE, Arithmetic exception.
0x4006f3e8 in raise () from /lib/libc.so.6
(gdb) bt
#0  0x4006f3e8 in raise () from /lib/libc.so.6
#1  0x0000c1c8 in __div0 ()
    at ../../llvm-gcc-4.2-2.5/gcc/config/arm/lib1funcs.asm:1145
#2  0x0000b874 in L12 ()
    at ../../llvm-gcc-4.2-2.5/gcc/config/arm/lib1funcs.asm:885
#3  0x00008c54 in main ()
(gdb)

I quit at this point.

On the llvm-devmailing list, Anton Korobeynikov writes today:

> both ppc and arm were broken at the time for 2.5 release.
>
> Hopefully things will be much better with the coming 2.6 release, at
> least one might expect arm and ppc to be more or less ok. ia64 support
> was completely dropped and sparc should be brokens as of time of 2.5.
>
> You might want to stick with next 2.6 release, which is scheduled to
> be out within next 1.5 months
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