[Bug c/45010] New: Link errors in bootstrap with static libgmpxx.a

[Bug c/45010] New: Link errors in bootstrap with static libgmpxx.a

[marc dot mengel at gmail dot com]

The link options link with -lgmpxx, but do not include the required -lstdc++
and -lm options to make that link successful.  This works accidentally if gmp
is built as a shared library, which knows its dependencies at runtime, but if
it is built static, the links fail with a sea of errors about undefined
symbols.

Reprodce by:
configure gmp library with --disable-shared and install /some/where
configure gcc with --with-gmp=/some/where
make bootstrap


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           Summary: Link errors in bootstrap with static libgmpxx.a
           Product: gcc
           Version: 4.5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: marc dot mengel at gmail dot com
 GCC build triplet: i686-pc-linux-gnu
  GCC host triplet: i686-pc-linux-gnu
GCC target triplet: i686-pc-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45010

[Bug c/45010] Link errors in bootstrap with static libgmpxx.a

[pinskia at gcc dot gnu dot org]

------- Comment #1 from pinskia at gcc dot gnu dot org  2010-07-20 21:49 -------
>From http://gcc.gnu.org/install/configure.html :

--with-host-libstdcxx=linker-args
    If you are linking with a static copy of PPL, you can use this option to
specify how the linker should find the standard C++ library used internally by
PPL. Typical values of linker-args might be `-lstdc++' or
`-Wl,-Bstatic,-lstdc++,-Bdynamic -lm'. If you are linking with a shared copy of
PPL, you probably do not need this option; shared library dependencies will
cause the linker to search for the standard C++ library automatically. 


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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=45010

[Bug c/45010] Link errors in bootstrap with static libgmpxx.a

[marc dot mengel at gmail dot com]

------- Comment #2 from marc dot mengel at gmail dot com  2010-07-20 21:51 -------
Created an attachment (id=21271)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=21271&action=view)
patch to configure.ac to include needed libraries for static libgmpxx

This is a pretty straightforward fix..


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45010

[Bug c/45010] Link errors in bootstrap with static libgmpxx.a

[marc dot mengel at gmail dot com]

------- Comment #3 from marc dot mengel at gmail dot com  2010-07-20 22:10 -------
So if we prefer a nonstandard configure option to having it work for the right
reasons, that's okay, I guess...


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45010