[Bug c/32314] for gcc-4.2gcc-4disable-decimal-float not working on i686, powerpc, sparc. gcc-4.3.0

["pinskia at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>]

------- Comment #6 from pinskia at gcc dot gnu dot org  2007-06-13 07:30 -------
The C extensions are disabled with --disable-decimal-float.  I never said they
were not, in fact here is a quote from me:
Even if you disable dfp, libdecnumber is still needed to compile gcc as
disable-decimal-float really just disables the C interface

Again --disiable-decimal-float just disables the C interface and not the
support library.


----- cut ------
What don't you understand about "C interface"?

Also the library libdecnumber is licensed under GPL+extension and not LGPL. 
Please read the header and source files before saying they are under a license
when they are not.  This is just like libgcc's license.

GPLv3 is not going to replace GPL+ exception, the exception is still going to
be there, nothing is going to change.

To answer your points:
1) It is a copyright license, it gives you rights which you don't have before
with the code.

2) Use -pedantic-errors if you want full C90 complaint (or -std=c99
-pedantic-errors for C99).

3) see above about GPL+exception.

4) See above about my comments about disabling the C interface with
--disable-decimal-float and about -pedantic-errors in 1).

5) wtf, I really mean WHAT THE FUCK.  Come on, this is a joke, right?  But
really see my point about GPL+ exception, if you don't understand the
exception, then get a laywer to read it.  It is not like we are all lawyers
here.


So again --disable-decimal-float disables the C interface.  The version of the
library which is being compiled is really the library that gets linked into
GCC.


The code in c-decl.c shows that -pedantic-errors will disable this extension:
              if (!targetm.decimal_float_supported_p ())
                error ("decimal floating point not supported for this target");
              if (pedantic)
                pedwarn ("ISO C does not support decimal floating point");

And it also shows it will disable it for --disable-decimal-float as the default
(and only one) decimal_float_supported_p does:
bool
default_decimal_float_supported_p (void) 
{     
  return ENABLE_DECIMAL_FLOAT;
}

and ENABLE_DECIMAL_FLOAT is set to 0 by configure:
dfp=`if test $enable_decimal_float != no; then echo 1; else echo 0; fi`
AC_DEFINE_UNQUOTED(ENABLE_DECIMAL_FLOAT, $dfp,
[Define to 1 to enable decimal float extension to C.])

Where enable_decimal_float is set:
AC_ARG_ENABLE(decimal-float,
[  --enable-decimal-float={no,yes,bid,dpd}
                        enable decimal float extension to C.  Selecting 'bid'
                        or 'dpd' choses which decimal floating point format
                        to use],
[
  case $enable_decimal_float in
    yes | no | bid | dpd) ;;
    *) AC_MSG_ERROR(['$enable_decimal_float' is an invalid value for
--enable-decimal-float.
Valid choices are 'yes', 'bid', 'dpd', and 'no'.]) ;;
  esac
],
[
  case $target in
    powerpc*-*-linux* | i?86*-*-linux* | x86_64*-*-linux*)
      enable_decimal_float=yes
      ;;
    *)
      AC_MSG_WARN(decimal float is not supported for this target, ignored)
      enable_decimal_float=no
      ;;
  esac
])


What more do you want to say? 


-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|                            |INVALID


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32314