Issues when using libs built with CMake on Linux

[ppearson]

Building IlmBase 2.0 and OpenEXR 2.0 (from the website) using CMake on Linux64 works (in terms of producing the target libs), but then linking those output libs that have been built against an application doesn't work, due to the following issues:

1. ImfNamespace.h is missing from ./IlmImf/CMakeLists.txt in the Headers INSTALL section, so that header is never installed in the target directory, so anything which needs it (OpenEXR reading/writing) can't find it.
2. ./OpenEXR-2.0.0/IlmImf/CMakesList.txt is not adding the ilmBase libs as target link libraries, so there's unresolved symbols to all header-only (mostly constructors and destructors) at link time. Adding:
   TARGET_LINK_LIBRARIES(IlmImf -lImath -lIexMath -lHalf -lIex -lIlmThread -pthread)
   after:
   ADD_LIBRARY ( IlmImf STATIC)
   fixes that.

These issues also affect OS X, plus there are additional issues on OS X that I'll look into later.

[pstanczyk]

Hey - I think this should all be fixed up by now. Could you try the cmake-fixes branch and let me know if all is working for you.

[ppearson]

Linux debug seems to be fine with gcc 4.7.1 and 4.8.1 - I'll try and get release checked within the next few days - I'm going to need to change some infrastructure stuff to test that properly...

Quick question (I think this was asked in another issue, but I can't find it now): is the libtool stuff (.la file generation) still needed, as IlmBase appears to have (haven't checked if it works) pkgconfig stuff? It's not a problem, I'm just curious.

Thanks.

[pstanczyk]

Thanks for that.

No, I don't think we would need the .la files with CMake.

Whilst exploring this a bit more on the linux platform, I noticed that adding the namespaces into the library name does make it difficult to build IlmImf against the IlmBase libs, but I think we can come back to that.

• Piotr

  ---

  From: Peter Pearson [notifications@github.com]
  Sent: 20 October 2013 12:08
  To: openexr/openexr
  Cc: Piotr Stanczyk
  Subject: Re: [openexr] Issues when using libs built with CMake on Linux (Issues when using libs built with CMake on Linux #61)

Linux debug seems to be fine with gcc 4.7.1 and 4.8.1 - I'll try and get release checked within the next few days - I'm going to need to change some infrastructure stuff to test that properly...

Quick question (I think this was asked in another issue, but I can't find it now): is the libtool stuff (.la file generation) still needed, as IlmBase appears to have (haven't checked if it works) pkgconfig stuff? It's not a problem, I'm just curious.

Thanks.

—
Reply to this email directly or view it on GitHubhttps://github.com//issues/61#issuecomment-26680035.

[ppearson]

Okay, seems to work nicely in release too. Many thanks.

[ppearson]

Actually, on Linux with CMake only, I don't think the custom command for generating the b44ExpLogTable.h is working:

I'll add this as a separate issue as it affects Linux and OS X: Issue 77.

[ehanway-ilm]

Closing this out. Tested with 2.2: the original issues with the ImfNamespace.h and link libraries for IlmImf are addressed, and the auto generation of the tables is working on Linux.