[Bug target/42904] New: Attribute dllexport should imply externally_visible

[Bug target/42904] New: Attribute dllexport should imply externally_visible

[d dot g dot gorbachev at gmail dot com]

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           Summary: Attribute dllexport should imply externally_visible
           Product: gcc
           Version: 4.5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: d dot g dot gorbachev at gmail dot com
GCC target triplet: *-*-mingw32


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42904

[Bug target/42904] Attribute dllexport should imply externally_visible

[d dot g dot gorbachev at gmail dot com]

------- Comment #1 from d dot g dot gorbachev at gmail dot com  2010-01-30 02:21 -------
Created an attachment (id=19757)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=19757&action=view)
Testcase

Produces "undefined reference to `_foo'" error.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42904

[Bug target/42904] Attribute dllexport should imply externally_visible

[davek at gcc dot gnu dot org]

------- Comment #2 from davek at gcc dot gnu dot org  2010-05-17 17:02 -------
Yes, it certainly does, in fact it omits to compile any definition for 'foo'
whatsoever!

But isn't this the expected behaviour of using '-fwhole-program' on something
that is not the whole program?  I'm not sure if the option is supposed to be
suitable for use when building a shared library, I'll ask on the mailing list.


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davek at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |davek at gcc dot gnu dot org
      Known to work|                            |4.3.4


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42904

[Bug target/42904] Attribute dllexport should imply externally_visible

[davek at gcc dot gnu dot org]

------- Comment #3 from davek at gcc dot gnu dot org  2010-05-17 18:28 -------
Consensus seems to be that this is indeed "how it's meant to work", but that
figuring out which are the externally visible functions and marking them
automatically would be a nice enhancement that would make the -fwhole-program
option work on libraries, so I think we should do it.


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davek at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|unassigned at gcc dot gnu   |davek at gcc dot gnu dot org
                   |dot org                     |
           Severity|normal                      |enhancement
             Status|UNCONFIRMED                 |ASSIGNED
     Ever Confirmed|0                           |1
   Last reconfirmed|0000-00-00 00:00:00         |2010-05-17 18:28:38
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42904