[erlang-questions] problems building r11b-3

Ulf Wiger <>
Wed Dec 10 17:50:04 CET 2008


Thanks. Indeed it said that floating point exceptions were
unreliable. I think I'll just disable hipe, since I have a good
R12B install already.

BR,
Ulf W

2008/12/10 Mikael Pettersson <>:
> Ulf Wiger writes:
>  > Thanks, That got me further:
> [snip]
>  > obj/i686-pc-linux-gnu/opt/hybrid/ttsl_drv.o -lutil -ldl -lm
>  > -lpthread -lncurses -L../lib/internal/i686-pc-linux-gnu
>  > /home/uwiger/src/otp/otp_src_R11B-3/erts/obj/i686-pc-linux-gnu/libz.a
>  > -lethread -lpthread -lerts_internal_r -lrt
>  > obj/i686-pc-linux-gnu/opt/hybrid/hipe_x86_bifs.o: In function
>  > `nbif_handle_fp_exception':
>  > /home/uwiger/src/otp/otp_src_R11B-3/erts/emulator/i686-pc-linux-gnu/opt/hybrid/hipe_x86_bifs.S:269:
>  > undefined reference to `erts_restore_fpu'
>  > collect2: ld returned 1 exit status
>  > make[3]: *** [/home/uwiger/src/otp/otp_src_R11B-3/bin/i686-pc-linux-gnu/beam.hybrid]
>  > Error 1
>
> Looks like erts/configure didn't detect working FP exceptions on this box,
> which since it's an x86 most likely is a compile problem with the fpe-test.c
> program embedded in erts/configure.in. Without FP exceptions you can't have
> HiPE (except on ARM which assumes no HW FPU).
>
> I believe there are now (R12) explicit checks in erts/configure to disable
> HiPE on x86/powerpc/sparc if FP exceptions don't work, perhaps those checks
> don't exist in R11.
>
> Either run erts/configure again and look for messages about reliable floating-
> point exceptions not working, or look in erts/i686-pc-linux-gnu/config.h for
> a #define NO_FPE_SIGNALS.
>
> If you can't resolve the lack of FP exception support, you'll have to
> reconfigure with --disable-hipe.
>



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