From: Sebastian Huber <sebastian.huber@embedded-brains.de>
To: Newlib <newlib@sourceware.org>
Subject: Re: fenv() support broken with GCC 10 on ARM
Date: Thu, 9 Jul 2020 20:07:53 +0200 [thread overview]
Message-ID: <2846ae61-be97-6fba-6eef-58563a0378de@embedded-brains.de> (raw)
In-Reply-To: <CAH5ZSWpcBh=EEjvcz3c956CbR9JvHA_UTfxyGJCG4B4jhWtt2w@mail.gmail.com>
On 09/07/2020 19:16, Eshan Dhawan wrote:
> Hi Sebastian,
> Could you please tell the steps to recreate the error :)
You have to build a GCC 10 for ARM. For example using the latest RTEMS
Source Builder:
arm-rtems6-gcc --version
arm-rtems6-gcc (GCC) 10.1.1 20200703 (RTEMS 6, RSB
5ab61d2e8c7ced8c685541509a7ac4eba704e69e, Newlib f095752)
Copyright (C) 2020 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
Then compile the following test program:
#include <fenv.h>
int main()
{
return fesetenv( FE_DFL_ENV );
}
arm-rtems6-gcc init.c -mthumb -mcpu=cortex-m3 -lm -Wl,-Map,map.txt
/build/rtems/6/lib/gcc/arm-rtems6/10.1.1/../../../../arm-rtems6/bin/ld:
/build/rtems/6/lib/gcc/arm-rtems6/10.1.1/../../../../arm-rtems6/lib/thumb/cortex-m3/libm.a(lib_a-fenv-vfp.o):/scratch/git-rtems-source-builder/rtems/build/arm-rtems6-gcc-50666d2-newlib-f095752-x86_64-linux-gnu-1/build/arm-rtems6/thumb/cortex-m3/newlib/targ-include/machine/fenv-softfloat.h:61:
multiple definition of `__softfloat_float_rounding_mode';
/build/rtems/6/lib/gcc/arm-rtems6/10.1.1/../../../../arm-rtems6/lib/thumb/cortex-m3/libm.a(lib_a-fenv-softfp.o):/scratch/git-rtems-source-builder/rtems/build/arm-rtems6-gcc-50666d2-newlib-f095752-x86_64-linux-gnu-1/build/arm-rtems6/thumb/cortex-m3/newlib/targ-include/machine/fenv-softfloat.h:61:
first defined here
/build/rtems/6/lib/gcc/arm-rtems6/10.1.1/../../../../arm-rtems6/bin/ld:
/build/rtems/6/lib/gcc/arm-rtems6/10.1.1/../../../../arm-rtems6/lib/thumb/cortex-m3/libm.a(lib_a-fenv-vfp.o):/scratch/git-rtems-source-builder/rtems/build/arm-rtems6-gcc-50666d2-newlib-f095752-x86_64-linux-gnu-1/build/arm-rtems6/thumb/cortex-m3/newlib/targ-include/machine/fenv-softfloat.h:60:
multiple definition of `__softfloat_float_exception_mask';
/build/rtems/6/lib/gcc/arm-rtems6/10.1.1/../../../../arm-rtems6/lib/thumb/cortex-m3/libm.a(lib_a-fenv-softfp.o):/scratch/git-rtems-source-builder/rtems/build/arm-rtems6-gcc-50666d2-newlib-f095752-x86_64-linux-gnu-1/build/arm-rtems6/thumb/cortex-m3/newlib/targ-include/machine/fenv-softfloat.h:60:
first defined here
/build/rtems/6/lib/gcc/arm-rtems6/10.1.1/../../../../arm-rtems6/bin/ld:
/build/rtems/6/lib/gcc/arm-rtems6/10.1.1/../../../../arm-rtems6/lib/thumb/cortex-m3/libm.a(lib_a-fenv-vfp.o):/scratch/git-rtems-source-builder/rtems/build/arm-rtems6-gcc-50666d2-newlib-f095752-x86_64-linux-gnu-1/build/arm-rtems6/thumb/cortex-m3/newlib/targ-include/machine/fenv-softfloat.h:59:
multiple definition of `__softfloat_float_exception_flags';
/build/rtems/6/lib/gcc/arm-rtems6/10.1.1/../../../../arm-rtems6/lib/thumb/cortex-m3/libm.a(lib_a-fenv-softfp.o):/scratch/git-rtems-source-builder/rtems/build/arm-rtems6-gcc-50666d2-newlib-f095752-x86_64-linux-gnu-1/build/arm-rtems6/thumb/cortex-m3/newlib/targ-include/machine/fenv-softfloat.h:59:
first defined here
/build/rtems/6/lib/gcc/arm-rtems6/10.1.1/../../../../arm-rtems6/bin/ld:
warning: cannot find entry symbol _start; defaulting to 0000000000008000
In the linker map file you will find this dependency chain:
/build/rtems/6/lib/gcc/arm-rtems6/10.1.1/../../../../arm-rtems6/lib/thumb/cortex-m3/libm.a(lib_a-fenv.o)
/tmp/cclZauID.o (fesetenv)
/build/rtems/6/lib/gcc/arm-rtems6/10.1.1/../../../../arm-rtems6/lib/thumb/cortex-m3/libm.a(lib_a-fenv-softfp.o)
/build/rtems/6/lib/gcc/arm-rtems6/10.1.1/../../../../arm-rtems6/lib/thumb/cortex-m3/libm.a(lib_a-fenv.o)
(__softfp_feclearexcept)
/build/rtems/6/lib/gcc/arm-rtems6/10.1.1/../../../../arm-rtems6/lib/thumb/cortex-m3/libm.a(lib_a-fenv-vfp.o)
/build/rtems/6/lib/gcc/arm-rtems6/10.1.1/../../../../arm-rtems6/lib/thumb/cortex-m3/libm.a(lib_a-fenv.o)
(__vfp_feclearexcept)
You have the following symbols:
nm
/build/rtems/6/lib/gcc/arm-rtems6/10.1.1/../../../../arm-rtems6/lib/thumb/cortex-m3/libm.a
--defined-only | grep -C 3 __soft
lib_a-feholdexcept.o:
lib_a-fenv-softfp.o:
00000000 B __softfloat_float_exception_flags
00000000 B __softfloat_float_exception_mask
00000000 B __softfloat_float_rounding_mode
00000000 T __softfp_feclearexcept
00000000 T __softfp_fedisableexcept
00000000 T __softfp_feenableexcept
00000000 T __softfp_fegetenv
00000000 T __softfp_fegetexcept
00000000 T __softfp_fegetexceptflag
00000000 T __softfp_fegetround
00000000 T __softfp_feholdexcept
00000000 T __softfp_feraiseexcept
00000000 T __softfp_fesetenv
00000000 T __softfp_fesetexceptflag
00000000 T __softfp_fesetround
00000000 T __softfp_fetestexcept
00000000 T __softfp_feupdateenv
lib_a-fenv-vfp.o:
00000000 B __softfloat_float_exception_flags
00000000 B __softfloat_float_exception_mask
00000000 B __softfloat_float_rounding_mode
00000000 T __vfp_feclearexcept
00000000 T __vfp_fedisableexcept
00000000 T __vfp_feenableexcept
next prev parent reply other threads:[~2020-07-09 18:08 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-08 13:00 Sebastian Huber
2020-07-08 13:19 ` Joel Sherrill
2020-07-08 17:26 ` Sebastian Huber
2020-07-08 17:41 ` Sebastian Huber
[not found] ` <CAH5ZSWo_nqnALqjgUDxUX_9B8pNLHK3kwTktXYQ_Lh+d4aJDfw@mail.gmail.com>
[not found] ` <bcb3c1cd-32d8-b726-fcdd-5bcc7c6d944f@embedded-brains.de>
[not found] ` <CAH5ZSWpcBh=EEjvcz3c956CbR9JvHA_UTfxyGJCG4B4jhWtt2w@mail.gmail.com>
2020-07-09 18:07 ` Sebastian Huber [this message]
2020-07-08 17:42 ` Eshan Dhawan
2020-07-08 17:45 ` Sebastian Huber
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