Using libdeflate as static library | Together C & C++ | Page 1

tall pendant Oct 28, 2023, 10:32 AM

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Hi, I'm trying to use libdeflate as a static library, so there's no need to redistribute dlls alongside the app.

I have a libdeflate/ directory in my project root, which contains deflate.lib and deflate.h. The program links and compiles, but I get a missing deflate.dll error at runtime.

How do I make it use the static library and not the non-existent dynamic one?

midnight nacelleBOT Oct 28, 2023, 10:32 AM

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warped umbra Oct 28, 2023, 10:36 AM

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That library file is apparently for the dynamic version of the library, you need to get the static version.

tall pendant Oct 28, 2023, 10:39 AM

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I don't know where to find the static version. It's not on vcpkg and not on the releases page, and I for sure am not installing wsl to compile it

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The static library (normally called libdeflate.a)
Great. Linux only.

warped umbra Oct 28, 2023, 10:45 AM

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tall pendant > The static library (normally called libdeflate.a) Great. Linux only.

Well that sentence only applies to Linux.

tall pendant Oct 28, 2023, 10:46 AM

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What about windows? The author provides only the prebuilt dll for windows.

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But linux gets the static library too.

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Am I seriously expected to build it myself...

warped umbra Oct 28, 2023, 10:46 AM

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You are using ebiggers's right?

tall pendant Oct 28, 2023, 10:46 AM

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Yes

warped umbra Oct 28, 2023, 10:47 AM

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Then there is this section: https://github.com/ebiggers/libdeflate#directly-integrating-the-library-sources

tall pendant Oct 28, 2023, 10:48 AM

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I tried that, and at first it complained about implicit casting, so I set them to compile as C in the vcxproj. Then some other random bullshit came up and I just gave up

warped umbra Oct 28, 2023, 10:48 AM

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Try showing it.

tall pendant Oct 28, 2023, 10:50 AM

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Getting a linker error, even though the code is being compiled

warped umbra Oct 28, 2023, 10:51 AM

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Here I built it for you:

📎 deflatestatic.lib

tall pendant Oct 28, 2023, 10:52 AM

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Thank you so much

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Hmm, still a linker error

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Not sure what's up, it seems correctly configured

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      <AdditionalDependencies>deflate.lib;%(AdditionalDependencies)</AdditionalDependencies>
      <AdditionalLibraryDirectories>../../libdeflate;%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>

warped umbra Oct 28, 2023, 10:56 AM

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tall pendant Getting a linker error, even though the code is being compiled

Wait a bit, this looks like macOS?

tall pendant Oct 28, 2023, 10:57 AM

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It's Rider on Windows

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Haha, it does look a bit like MacOS

warped umbra Oct 28, 2023, 10:58 AM

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OK. So you are using MSVC right, just to be sure.

tall pendant Oct 28, 2023, 10:58 AM

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Yep.

warped umbra Oct 28, 2023, 10:58 AM

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OK, then show those linker errors, paste as text so that I can paste into Google translate.

tall pendant Oct 28, 2023, 10:59 AM

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Hang on for a bit, I cleaned the solution and it's now rebuilding everything 😬

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The errors are just
unresolved external symbol "_libdeflate_alloc_compressor"
unresolved external symbol "_libdeflate_gzip_compress"

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Bit annoying how Rider uses the system language, but it's fine

warped umbra Oct 28, 2023, 11:01 AM

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You are using the file I sent right? The file name doesn't seem to be the same.

tall pendant Oct 28, 2023, 11:02 AM

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I renamed it to deflate.lib

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Anyway, I'm looking for x86, not x64

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Targetting Win32 still haha

warped umbra Oct 28, 2023, 11:03 AM

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That explains it.

tall pendant Oct 28, 2023, 11:04 AM

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May I ask how you're building this so quickly?

warped umbra Oct 28, 2023, 11:04 AM

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It just uses CMake.

tall pendant Oct 28, 2023, 11:05 AM

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Oh, I thought it used some linux-specific stuff. Well good to know I'm ignorant for no reason lol

warped umbra Oct 28, 2023, 11:08 AM

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Here's the 32-bit version.

📎 deflatestatic.lib

tall pendant Oct 28, 2023, 11:08 AM

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Thank you

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  unresolved external symbol "__except_handler4_common" in function "__except_handler4".

The other errors are gone, but now there's this obscure one. Is this some crt incompatibility or

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Are you compiling targetting MSVC 2015?

warped umbra Oct 28, 2023, 11:11 AM

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No.

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Maybe it's better that you learn to build the library by yourself then.

tall pendant Oct 28, 2023, 11:13 AM

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Alright

midnight nacelleBOT Oct 28, 2023, 11:18 AM

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@tall pendant Has your question been resolved? If so, type !solved :)

tall pendant Oct 28, 2023, 11:19 AM

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!solved

midnight nacelleBOT Oct 28, 2023, 11:19 AM

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Thank you and let us know if you have any more questions!

This thread is now set to auto-hide after an hour of inactivity

tall pendant Oct 28, 2023, 11:36 AM

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@warped umbra Sorry, I can't figure it out. How did you build x86? I only get the target for x64 in the dropdown in VS.

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It generates this, I open it and then

warped umbra Oct 28, 2023, 11:37 AM

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Specify -A Win32 to CMake.

tall pendant Oct 28, 2023, 11:37 AM

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Ahh, thank you.

#Using libdeflate as static library