Compile ModSecurity on Windows cannot build dll file

[YornSokha]

Error message :
Auto build dll exports zlib.lib(zlib1.dll) : error LNK2005: zlibVersion already defined in zlib.lib(zutil.c.obj) [E:\Test\ModSecurity\build\win32\build\libModSecurity.vcxproj] zlib.lib(zlib1.dll) : error LNK2005: inflate already defined in zlib.lib(inflate.c.obj) [E:\Test\ModSecurity\build\win32\build\libModSecurity.vcxproj] zlib.lib(zlib1.dll) : error LNK2005: inflateEnd already defined in zlib.lib(inflate.c.obj) [E:\Test\ModSecurity\build\win32\build\libModSecurity.vcxproj] zlib.lib(zlib1.dll) : error LNK2005: inflateInit_ already defined in zlib.lib(inflate.c.obj) [E:\Test\ModSecurity\build\win32\build\libModSecurity.vcxproj] zlib.lib(zlib1.dll) : error LNK2005: inflateInit2_ already defined in zlib.lib(inflate.c.obj) [E:\Test\ModSecurity\build\win32\build\libModSecurity.vcxproj] Creating library E:/Test/ModSecurity/build/win32/build/Release/libModSecurity.lib and object E:/Test/ModSecurity/build/win32/build/Release/libModSecurity.exp E:\Test\ModSecurity\build\win32\build\Release\libModSecurity.dll : fatal error LNK1169: one or more multiply defined symbols found [E:\Test\ModSecurity\build\win32\build\libMod

[airween]

hi @YornSokha,

thanks for this report - unfortunately it seems that you didn't give any relevant information (see our issue templates), but I assume you want to build libmodsecurity3 on Windows.

Windows port was made by @eduar-hte, I've never tried that yet. The only help is our GH action where you can check the steps.

[YornSokha]

Hi @airween, my purpose is trying to embed this library within .NET web application API and use it as a middleware. I also checked that this library wasn't built for that purpose. Anywaysy I just want to try and hopefully get some advice. Thanks!

[airween]

@YornSokha could you build the library for your .NET application? If yes, could you share your experiences?

[YornSokha]

Yes after hundreds attempts and I spent almost 3 days to be able to build it and embed into .NET application middleware.
I didn't document all the things I have been done because my intention was to build it. I can share the library that it may help you if you wish to do so on Windows below: https://github.com/YornSokha/ModSecPoc/tree/poc_dll/ModSecurity/Native/Dependencies

[YornSokha]

And for everyone who is looking for something like me, you can also check my repo about embedding (ModSecurity+OWASP CRS) into .NET application here: https://github.com/YornSokha/ModSecPoc/