[linuxsh-dev] Re: compiler problem gcc 3.2

[kaz K. <kk...@rr...>]

Hi,

"peter garrone" <pga...@li...> wrote:
> The trailing program, derived from the glibc -2.3.1 file
> 
> sysdeps/ieee754/dbl-64/e_atan2.c
> 
> when compiled with gcc 3.2 and also gcc 3.2.2,
> generates this error (gcc 3.2.2).
> gcc is set up as a cross compiler, host linux pc, target sh4.
> 
> prog.c: In function `__ieee754_atan2':
> prog.c:171: Internal compiler error in output_branch, at config/sh/sh.c:1050

It is known that BBRO (basic block reordering optimization) of
GCC does not work well on SH target for unfortunate case. Plain
gcc-3.2/3.2.2 has no workarounds for this issue.
Please give it a try with downgrading the optimization to -O1 or
-O2 -fno-reorder-blocks. If you want to add -fno-reorder-blocks
option only for e_atan2.c, you can add a line like

CFLAGS-e_atan2.os += -fno-reorder-blocks

(for PIC case) to your configparms file in your glibc build directory
to do so.

BTW, my current configparms is:

CC := sh4-unknown-linux-gnu-gcc -B/usr/local/lib/gcc-lib/sh4-unknown-linux-gnu/3.4/
CFLAGS-s_tan.os += -O2
CFLAGS-ns_name.os += -O2
CFLAGS-rtld.os := -finline-limit=4800 --param max-inline-insns-single=4800
no-z-defs=yes

and I'm using make CFLAGS=-O usually.

Regards,
	kaz