[Bug libfortran/47032] New: libgfortran references complex long double functions missing on AIX

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7 total messages Started by "dje at gcc dot Tue, 21 Dec 2010 16:22

#304559

Author: "dje at gcc dot
Date: Tue, 21 Dec 2010 16:22

38 lines
1652 bytes

http://gcc.gnu.org/bugzilla/show_bug.cgi?idG032

           Summary: libgfortran references complex long double functions
                    missing on AIX
           Product: gcc
           Version: 4.6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: libfortran
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: dje@gcc.gnu.org


ld: 0711-317 ERROR: Undefined symbol: .__copysignl128
ld: 0711-317 ERROR: Undefined symbol: .__nextafterl128
ld: 0711-317 ERROR: Undefined symbol: .__scalbnl128
ld: 0711-317 ERROR: Undefined symbol: .__cabsl128
ld: 0711-317 ERROR: Undefined symbol: .__cargl128
ld: 0711-317 ERROR: Undefined symbol: .__truncl128

/*
 * There are two forms of long double on AIX.  The default
 * form of long double is the same as a double - 64 bits.  There
 * is a 128-bit form available with some compilers.  If that compiler
 * defines __LONGDOUBLE128, then long doubles are 128-bit instead of
 * 64-bit.  Since the same library routine cannot be used for 128-bit
 * and 64-bit values, the 128-bit routines are renamed and macros are
 * used to manage the name spaces.  It is not necessarily the case that
 * all of the 128-bit versions are available, but the macros are defined
 * intentionally since the 64-bit versions can provide incorrect results
 * when long double values were expected.  If 64-bit versions are required
 * in 128-bit mode, then the code needs to invoke the double routines a
 * rather than the long double routines.
 */

As the comment mentions, not all functions are available(!), but the functions
are redefined to prevent wrong results.

[Bug target/47032] libgfortran references complex long double functions missing on AIX

#304560

Author: "kargl at gcc do
Date: Tue, 21 Dec 2010 16:42

14 lines
621 bytes

http://gcc.gnu.org/bugzilla/show_bug.cgi?idG032

kargl at gcc dot gnu.org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |kargl at gcc dot gnu.org
          Component|libfortran                  |target

--- Comment #1 from kargl at gcc dot gnu.org 2010-12-21 16:42:29 UTC ---
From the description of the problem, this appears
to be a target bug not a libgfortran bug.  The
penultimate sentence in the quoted comments even
states that AIX is playing games with the namespace.

[Bug target/47032] libgfortran references complex long double functions missing on AIX

#304561

Author: "dje at gcc dot
Date: Tue, 21 Dec 2010 17:08

16 lines
873 bytes

http://gcc.gnu.org/bugzilla/show_bug.cgi?idG032

David Edelsohn <dje at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2010.12.21 17:07:47
     Ever Confirmed|0                           |1

--- Comment #2 from David Edelsohn <dje at gcc dot gnu.org> 2010-12-21 17:07:47 UTC ---
This is an interaction / assumption problem between the target (AIX) and
libgfortran.  libgfortran previously built with GCC 4.4 s, this is a regression
because libgfortran is relying on more OS features without providing an
alternative.  And disabling all long double support (which works in G++) or
disabling libgfortran on AIX because of this issue seems like a bad options.

[Bug target/47032] libgfortran references complex long double functions missing on AIX

#304567

Author: "sgk at troutmas
Date: Tue, 21 Dec 2010 18:37

23 lines
1171 bytes

http://gcc.gnu.org/bugzilla/show_bug.cgi?idG032

--- Comment #3 from Steve Kargl <sgk at troutmask dot apl.washington.edu> 2010-12-21 18:37:21 UTC ---
On Tue, Dec 21, 2010 at 05:07:53PM +0000, dje at gcc dot gnu.org wrote:
> This is an interaction / assumption problem between the target (AIX) and
> libgfortran.  libgfortran previously built with GCC 4.4 s, this is a regression
> because libgfortran is relying on more OS features without providing an
> alternative.  And disabling all long double support (which works in G++) or
> disabling libgfortran on AIX because of this issue seems like a bad options.
>

libgfortran/configure.ac has lines of the form (note I wrapped the line)

AC_CHECK_LIB([m],[copysignl],[AC_DEFINE([HAVE_COPYSIGNL],[1],\
   [libm includes copysignl])])

So, configure is already checking if libm contains the
the "long double functions".  The problem appears to be
that AC_CHECK_LIB is a compile only test, and these tests
appear to pass on AIX.  AIX rquires a link time test to
either unseti, e.g., HAVE_COPYSIGNL or configure in general
should do a link time tests instead of a compile time tests
to ensure the HAVE_* macros are unset.

[Bug target/47032] libgfortran references complex long double functions missing on AIX

#304866

Author: "rguenth at gcc
Date: Tue, 28 Dec 2010 16:09

11 lines
490 bytes

http://gcc.gnu.org/bugzilla/show_bug.cgi?idG032

Richard Guenther <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |build
             Target|                            |powerpc-ibm-aix

--- Comment #4 from Richard Guenther <rguenth at gcc dot gnu.org> 2010-12-28 16:09:49 UTC ---
David, does GCC 4.5.x build on AIX?

[Bug target/47032] libgfortran references complex long double functions missing on AIX

#305676

Author: "dje at gcc dot
Date: Thu, 06 Jan 2011 18:55

10 lines
370 bytes

http://gcc.gnu.org/bugzilla/show_bug.cgi?idG032

--- Comment #5 from David Edelsohn <dje at gcc dot gnu.org> 2011-01-06 18:55:20 UTC ---
(In reply to comment #4)
> David, does GCC 4.5.x build on AIX?

GCC 4.5 libgfortran builds on AIX 5.3, but not AIX 6.1.  GCC 4.4 libgfortran
built on both, so this is a regression, but I had not noticed the regression on
AIX 6.1.

[Bug target/47032] libgfortran references complex long double functions missing on AIX

#307871

Author: "michael.haubenw
Date: Tue, 25 Jan 2011 19:56

11 lines
545 bytes

http://gcc.gnu.org/bugzilla/show_bug.cgi?idG032

Michael Haubenwallner <michael.haubenwallner at salomon dot at> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |michael.haubenwallner at
                   |                            |salomon dot at

--- Comment #6 from Michael Haubenwallner <michael.haubenwallner at salomon dot at> 2011-01-25 19:56:14 UTC ---
This looks like a dupe of bug#46481.

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