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IDProjectCategoryView StatusDate SubmittedLast Update
0015935VTK(No Category)public2016-01-13 17:312016-01-20 15:34
ReporterHans Johnson 
Assigned ToDavid Gobbi 
PriorityhighSeverityminorReproducibilityhave not tried
StatusclosedResolutionfixed 
PlatformOSOS Version
Product Version7.0.rcs 
Target Version7.0.0Fixed in Version 
Summary0015935: zlib symobls are not all hidden in VTK.
Descriptionzlib symobls are not all hidden in VTK.

duplicate symbol _z_errmsg in:
    /scratch/johnsonhj/src/BT-bld/lib/libvtkzlib-7.1.a(zutil.o)
    /scratch/johnsonhj/src/BT-bld/zlib-install/lib/libzlib.a(zutil.c.o)
ld: 1 duplicate symbol for architecture x86_64
TagsNo tags attached.
ProjectTBD
Typeincorrect functionality
Attached Files

 Relationships

  Notes
(0035651)
Hans Johnson (reporter)
2016-01-14 12:12

 This is NOT a bug. This was end-user error.

I had set ITK_USE_SYSTEM_ZLIB instead of VTK_USE_SYSTEM_ZLIB.

I checked every other variable regarding the system path to libraries and includes, and that ITK_USE_SYSTEM_ZLIB was on. I missed that VTK_USE_SYSTEM_ZLIB was still set to off.

Sorry.
(0035654)
David Gobbi (developer)
2016-01-14 17:52

 Hi Hans, are you sure that you're right about being wrong? :)

The _z_errmsg is, indeed, not mangled in vtkzlib. A dump gives this:

  nm libvtkzlib-7.0.dylib
  0000000000012140 S _z_errmsg

Setting VTK_USE_SYSTEM_ZLIB hides the issue by linking zlib instead of vtkzlib.
(0035662)
Hans Johnson (reporter)
2016-01-20 12:42

 My issue went away when I properly set VTK_USE_SYSTEM_ZLIB. Perhaps there is still a potential problem that needs to be addressed, but I could side-step it with my solution.


I do think that this should be mangled so that both system zlib and vtkzlib could be bound to the same application.
(0035663)
David Gobbi (developer)
2016-01-20 13:00

 This is a serious bug, there should be no symbol conflicts regardless of how VTK_USE_SYSTEM_ZLIB is set.

I've submitted a patch:
https://gitlab.kitware.com/vtk/vtk/merge_requests/1104 [^]
(0035666)
David Gobbi (developer)
2016-01-20 15:34

 The patch has been merged into master and put into the queue for the VTK 7.0 release.

 Issue History
Date Modified Username Field Change
2016-01-13 17:31 Hans Johnson New Issue
2016-01-14 12:12 Hans Johnson Note Added: 0035651
2016-01-14 17:52 David Gobbi Note Added: 0035654
2016-01-20 12:23 David Gobbi Assigned To => David Gobbi
2016-01-20 12:23 David Gobbi Status backlog => active development
2016-01-20 12:42 Hans Johnson Note Added: 0035662
2016-01-20 13:00 David Gobbi Note Added: 0035663
2016-01-20 13:00 David Gobbi Status active development => gerrit review
2016-01-20 13:03 David Gobbi Product Version => 7.0.rcs
2016-01-20 13:03 David Gobbi Target Version => 7.0.0
2016-01-20 15:34 David Gobbi Note Added: 0035666
2016-01-20 15:34 David Gobbi Status gerrit review => closed
2016-01-20 15:34 David Gobbi Resolution open => fixed

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