[FIXED] Zlib linking troubles. vcpkg. Windows 11 x64

Building Blender
1

Hello. I’m using Windows, Visual Studio 2022.

I downloaded and updated the clean main blender branch 3 or 4 times already.
And using any building modes - release, debug, using different ways to build it (using just make, make full nobuild and then with VS, as it is in the wiki) I get the same result - build error at the linking stage.
The error is about unresolved external symbol __imp_gzseek and same functions, gzclose, gzwrite, gzread, gzopen_w.

zlib files are where they have to be (lib\win64_vc15\zlib\lib). The lib is linked In blender VS main application project. I have no idea, how to fix it, can you please help? There is the build log file: https://pastebin.com/0pK9eRbE

2

In the bf_blenlib project, can you look up the fileops_c.cc right click it, select properties and setting this option in the advanced section:

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image786×544 17.2 KB

then right clicking fileops_c.cc again and select Compile this time, your build log should now include where it is picking up all includes from, can you paste the output?

3

Thank you so much for the hint! I found out that it was trying to pick zlib files from installed vcpkg. Removing them fixed everything, and I could build and run blender :slight_smile:

1>Note: including file: C:\Users\alekc\vcpkg\installed\x64-windows\include\zlib.h
1>Note: including file: C:\Users\alekc\vcpkg\installed\x64-windows\include\zconf.h

I’m real glad that now I can develop blender too!
Thanks!

4

It shouldn’t be picking up things from vcpkg, shame you already fixed the issue otherwise i’d like you to test this patch

diff --git a/build_files/cmake/macros.cmake b/build_files/cmake/macros.cmake
index 2ab4588cace..8c0224eb301 100644
--- a/build_files/cmake/macros.cmake
+++ b/build_files/cmake/macros.cmake
@@ -402,7 +402,9 @@ function(blender_add_lib__impl
   # message(STATUS "Configuring library ${name}")

   add_library(${name} ${sources})
-
+  if(WIN32)
+    set_target_properties(${name} PROPERTIES VS_GLOBAL_VcpkgEnabled "false")
+  endif()
   blender_target_include_dirs(${name} ${includes})
   blender_target_include_dirs_sys(${name} ${includes_sys})
5

Okay, I’ve tried to test this. There are my steps:

  • I have restored vcpkg zlib, and as expected, building failed again (linking with vcpkg zlib again)
  • Then I have remade project with new macros.cmake with your patch.
  • I builded again and everything works:
    1>Note: including file: A:\blender-dev\lib\win64_vc15\zlib\include\zlib.h
1>Note: including file:  A:\blender-dev\lib\win64_vc15\zlib\include\zconf.h

So, I suppose, the patch works :slight_smile:

6

Excellent! thanks for testing!

7

I also encountered this problem today, fixed by VS_GLOBAL_VcpkgEnabled Properties, that patch should commit to main branch.

8

Sorry, this one slipped through the cracks, committed in 23430f4db868.

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