Static compilation with libmongoc does not work

Dears,

Using the latest version of libmongoc, 1.29.1, my Visual Studio 2022 Project compiles just fine with MT and even MD setting, but only with the dynamic libs bson-1.0.lib and mongoc-1.0.lib.
This causes my resulting output (mydll.dll) to still require the bson-1.0.dll and mongoc-1.0.dll to be externally available. But i would like them statically compiled into mydll.dll so i have no hassles with local deployments.

I followed the guide here: Using libmongoc in a Microsoft Visual Studio project — libmongoc 1.23.1
The procedure is to include bson-static-1.0.lib and mongoc-static-1.0.lib (and a few other libs), as well as before include mongoc.h, write these lines
#define BSON_STATIC
#define MONGOC_STATIC

When i do that in my application, i get these > 400 warnings and 47 errors like this:
1>mongoc-static-1.0.lib(kms_request_str.obj) : error LNK2019: unresolved external symbol __imp_strdup referenced in function kms_request_str_path_normalized
1>OLDNAMES.lib(strdup.obi) : error LNK2001: unresolved external symbol __imp_strdup
1>OLDNAMES.lib(strdup.obi) : error LNK2001: unresolved external symbol __imp__strdup
1>C:\dev\MongoCBridge\x64\Debug\MongoCBridge.dll : fatal error LNK1120: 17 unresolved externals

When i try the same procedure with the hello_mongoc project from the examples of libmongoc, i also get errors but a little different. Examples:

2>hello_mongoc.obj : error LNK2019: unresolved external symbol __imp_bson_free referenced in function main
2>hello_mongoc.obj : error LNK2019: unresolved external symbol __imp_bcon_new referenced in function main

Any clues? :slight_smile: