Binaries missing after successful build? - c++

Question

I have a CMake project that I use to generate a Visual Studio solution, which I then try to compile. For some reason, the library file after compilation is nonexistent. I've searched my entire project folder, and cannot find any library files. Here's my CMake setup:
Project root:
cmake_minimum_required(VERSION 3.22)
project(ShadowContainers)
set(CMAKE_CXX_STANDARD 23)
set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR})
set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR})
set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR})
include_directories(include/)
add_subdirectory(library)
...
library subdirectory:
add_library(libShadows shadows.tpp ../include/shadows.hpp)
set_target_properties(libShadows PROPERTIES LINKER_LANGUAGE CXX) # a tpp and an hpp aren't enough to make the system certain it's c++
target_compile_features(libShadows PRIVATE cxx_std_23)
The MSbuild output contains these lines:
Done Building Project "C:\Users\[..]\projects\Shadow Array\library\libShadows.vcxproj" (default targets).
Done Building Project "C:\Users\[..]\projects\Shadow Array\library\libShadows.vcxproj.metaproj" (default targets).
Even if libShadows is the only target in my project, it's nowhere in my project directory.
Has anybody else had this experience? Any help is appreciated. Thanks!
Edit:
To compile the project, I have tried:
My typical process (working directory = the project root):
cmake .
msbuild ShadowContainers.sln
An alternate process (working directory also project root):
mkdir build
cd build
cmake ..
cmake --build .
Both have produced the same result, albeit with VS and CMake files in different places. No library is outputted either way.

Answer 1

I was able to find the issue. CMake (and conventions for that matter) do not see a .tpp as a code file (similarly to how they treat header files). Thus, I was trying to compile a target with no legitimate code files. Template-only libraries are not libraries at all, so I should not be attempting to compile this standalone, and should instead put the .hpp and .tpp as the include in my projects!