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Re: [ARM] Resurrect VxWorks port


On 31/05/13 18:57, Eric Botcazou wrote:
Hi,

as diagnosed by Doug, the VxWorks port cannot be built since:

2011-05-18  Joseph Myers  <joseph@codesourcery.com>

which reorganized the ARM options and turned arm_fp16_format from a global
variable defined in arm.c into an option variable, leading to:

In file included from ../../.././gcc/tm.h:20:0,
                  from /home/eric/svn/gcc/libgcc/fp-bit.c:38:
/home/eric/svn/gcc/libgcc/fp-bit.c: In function '__pack_f':
/home/eric/svn/gcc/libgcc/../gcc/config/arm/arm.h:426:22: error:
'arm_fp16_format' undeclared (first use in this function)
      ((bits) == 16 && arm_fp16_format == ARM_FP16_FORMAT_ALTERNATIVE)
                       ^
/home/eric/svn/gcc/libgcc/fp-bit.c:205:7: note: in expansion of macro
'LARGEST_EXPONENT_IS_NORMAL'
    if (LARGEST_EXPONENT_IS_NORMAL (FRAC_NBITS) && (isnan (src) || isinf
(src)))
        ^
/home/eric/svn/gcc/libgcc/../gcc/config/arm/arm.h:426:22: note: each
undeclared identifier is reported only once for each function it appears in
      ((bits) == 16 && arm_fp16_format == ARM_FP16_FORMAT_ALTERNATIVE)
                       ^
/home/eric/svn/gcc/libgcc/fp-bit.c:205:7: note: in expansion of macro
'LARGEST_EXPONENT_IS_NORMAL'
    if (LARGEST_EXPONENT_IS_NORMAL (FRAC_NBITS) && (isnan (src) || isinf
(src)))
        ^
make[3]: *** [_pack_sf.o] Error 1

Because fp-bit.c references macro
LARGEST_EXPONENT_IS_NORMAL (FRAC_NBITS)
which is defined in arm.h and references arm_fp16_format
which in turn is now a macro defined in options.h:
#define arm_fp16_format global_options.x_arm_fp16_format.

Furthermore

2011-08-05  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>

moved fp-bit.c into libgcc, making it more convoluted to fix it.

So we are proposing to switch the VxWorks port over to the soft-fp emulation
instead of the fp-bit one, like most of the other ARM ports.

Tested on ARM/VxWorks, OK for all active branches (they are all broken)?


2013-05-31  Douglas B Rupp  <rupp@adacore.com>

	* config.host (arm-wrs-vxworks): Configure with other soft float.



OK everywhere.

R.



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