[Bug target/26695] New: -mabi=ieeelongdouble / undefined reference to _q_add.

[Bug target/26695] New: -mabi=ieeelongdouble / undefined reference to _q_add.

[pluto at agmk dot net]

template < typename T >
T __add( T x, T y )
{
    return x + y;
}
template float __add( float, float );
template double __add( double, double );
template long double __add( long double, long double );

$ g++ add.cpp -O -mabi=ieeelongdouble
cc1plus: warning: Using IEEE extended precision long double
(...)
/tmp/cccCMXjm.o: In function
`long double __add<long double>(long double, long double)':add.cpp
(.text._Z5__addIeET_S0_S0_[_Z5__addIeET_S0_S0_]+0x70):
undefined reference to `_q_add'

i have a gcc-4.1.1snap with patches from PR25864.


-- 
           Summary: -mabi=ieeelongdouble / undefined reference to _q_add.
           Product: gcc
           Version: 4.1.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: pluto at agmk dot net
 GCC build triplet: ppc-linux
  GCC host triplet: ppc-linux
GCC target triplet: ppc-linux


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26695

[Bug target/26695] -mabi=ieeelongdouble / undefined reference to _q_add.

[pinskia at gcc dot gnu dot org]

------- Comment #1 from pinskia at gcc dot gnu dot org  2006-03-15 14:12 -------
Why are you using ieeelongdouble?  It is not really supported at all on
PPC-linux.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26695

[Bug target/26695] -mabi=ieeelongdouble / undefined reference to _q_add.

[pluto at agmk dot net]

------- Comment #2 from pluto at agmk dot net  2006-03-15 14:22 -------
(In reply to comment #1)
> Why are you using ieeelongdouble?

just for testing. is it enough reason?

> It is not really supported at all on PPC-linux.

so, for what gcc has such broken feature?

[ cite gcc.info@ppc ]

`-mabi=ABI-TYPE'
     Extend the current ABI with a particular extension, or remove such
     extension.  Valid values are ALTIVEC, NO-ALTIVEC, SPE, NO-SPE,
     IBMLONGDOUBLE, IEEELONGDOUBLE.
                    ^^^^^^^^^^^^^^

`-mabi=ibmlongdouble'
     Change the current ABI to use IBM extended precision long double.
     This is a PowerPC 32-bit SYSV ABI option.

`-mabi=ieeelongdouble'
     Change the current ABI to use IEEE extended precision long double.
     This is a PowerPC 32-bit Linux ABI option.
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[ /cite ]


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26695

[Bug target/26695] -mabi=ieeelongdouble / undefined reference to _q_add.

[joseph at codesourcery dot com]

------- Comment #3 from joseph at codesourcery dot com  2006-03-15 21:14 -------
Subject: Re:   New: -mabi=ieeelongdouble / undefined
 reference to _q_add.

On Wed, 15 Mar 2006, pluto at agmk dot net wrote:

> undefined reference to `_q_add'

This function is an ABI-defined function libc should define, glibc has 
definitions of these functions (except it wrongly defines _q_uitoq instead 
of _q_utoq) but you'll need to get a glibc version with those definitions 
built in.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26695

[Bug target/26695] -mabi=ieeelongdouble / undefined reference to _q_add.

[pinskia at gcc dot gnu dot org]

------- Comment #4 from pinskia at gcc dot gnu dot org  2006-03-16 14:11 -------
Not a GCC bug as explained by Joseph.


-- 

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=26695