Bug 482874 – media-gfx/blender-2.68a - CMake Error at build_files/cmake/macros.cmake:174 (add_library): Cannot find source file: /usr/include/eigen3/Eigen/src/Core/Product.h

• Status: RESOLVED FIXED
• Product: Gentoo Linux

[Description Andrew Savchenko 2013-08-29 03:22:20 UTC]

Hello,

blender-2.68a fails to build with dev-cpp/eigen-3.2.0 (from science overlay):

CMake Error at build_files/cmake/macros.cmake:174 (add_library):                                                                                                              
  Cannot find source file:                                                                                                                                                    
                                                                                                                                                                              
    /usr/include/eigen3/Eigen/src/Core/Product.h                                                                                                                              
                                                                                                                                                                              
  Tried extensions .c .C .c++ .cc .cpp .cxx .m .M .mm .h .hh .h++ .hm .hpp                                                                                                    
  .hxx .in .txx                                                                                                                                                               
Call Stack (most recent call first):                                                                                                                                          
  build_files/cmake/macros.cmake:189 (blender_add_lib_nolist)                                                                                                                 
  intern/itasc/CMakeLists.txt:356 (blender_add_lib)

[Comment 1 Andrew Savchenko 2013-08-29 03:22:38 UTC]

Created attachment 357290 [details]
build.log

[Comment 2 Andrew Savchenko 2013-08-29 03:22:59 UTC]

Created attachment 357292 [details]
environment

[Comment 3 Andrew Savchenko 2013-08-29 03:23:37 UTC]

Created attachment 357294 [details]
emerge --info

[Comment 4 Andrew Savchenko 2013-08-29 08:05:07 UTC]

Created attachment 357298 [details, diff]
blender-2.68-eigen-checks.patch

Blender-2.68a itself is API-compatible with eigen-3.2.0. The problem is in braindead cmake checks for eigen: it checks all headers, even those not used by blender directly. This problem can be fixed by removing offending checks. Afterwards blender builds and works fine.

[Comment 5 Markus Walter 2013-09-15 11:58:14 UTC]

I can confirm this problem on ~amd64, eigen-3.1.4 from science overlay works fine.

[Comment 6 Bernd Feige 2013-10-29 08:32:19 UTC]

(In reply to Andrew Savchenko from comment #4)
> Created attachment 357298 [details, diff] [details, diff]
> blender-2.68-eigen-checks.patch
> 
> Blender-2.68a itself is API-compatible with eigen-3.2.0. The problem is in
> braindead cmake checks for eigen: it checks all headers, even those not used
> by blender directly. This problem can be fixed by removing offending checks.
> Afterwards blender builds and works fine.

Confirmed here as well (~amd64, science overlay). Actually I'd suggest that current files/05-blender-2.68-unbundle-eigen3.patch should be modified - currently it fixes the paths to all individual include files to /usr/include (in intern/itasc/CMakeLists.txt) but it should actually simply remove these "source" lines. cmake is supposed to check included files itself.

Best regards,
Bernd

[Comment 7 Julian Ospald 2013-10-29 10:17:35 UTC]

science overlay looks unmaintained, it gives errors on cache generation and creates a lot of blockers for me, so don't expect me to test anything against that overlay

however, the header checks are definitely useless


+  29 Oct 2013; Julian Ospald <[e-mail]>
+  files/05-blender-2.68-unbundle-eigen3.patch:
+  supposedly fix bug 482874