cmake and dll/lib link on Windows - c

Question

I am working on windows with mingw and CMake.
Someone provide a library with lib, dll and header files. I am able to use it quite easily in Visual Studio projects. But I was not able to integrate it into a CMake project. There are already a lot of questions about this topic but only working for Linux, or with library build with CMake, or library where sources are available, or the same use case as me but with a lot of erratum in comments saying that the answer is never completely correct...
I would like to use the foo_function from the foo library in my bar project. I don't have the source of this foo project. Only a dll, lib and header file.
BarProject
├───
├─── CMakeLists.txt
├─── Foo
├─── include
└─── foo.h
├─── x64
|─── foo.dll
└─── foo.lib
└─── main_bar.c
This is the content of my CmakeLists.txt file :
cmake_minimum_required(VERSION 3.10)
# set the project name and version
project(bar VERSION 1.0)
# add the executable
add_executable(bar main_bar.c)
target_include_directories(bar PUBLIC "${PROJECT_BINARY_DIR}" "foo/include")
add_library(foo SHARED IMPORTED)
set_property(TARGET foo PROPERTY
IMPORTED_LOCATION "${CMAKE_SOURCE_DIR}/Foo/x64/foo.dll")
set_property(TARGET foo PROPERTY
IMPORTED_IMPLIB "${CMAKE_SOURCE_DIR}/Foo/x64/foo.lib")
target_link_libraries(bar PRIVATE foo)
set(CMAKE_VERBOSE_MAKEFILE ON)
set(CMAKE_SUPPRESS_REGENERATION true)
set_property(DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR} PROPERTY VS_STARTUP_PROJECT bar)
Finally to test my work :
$ ls
main_bar.c CMakeLists.txt Foo
$ mkdir tutu
$ cd tutu
$ cmake .. && cmake --build . -v
-- Building for: Visual Studio 16 2019
-- Selecting Windows SDK version 10.0.19041.0 to target Windows 10.0.19044.
-- The C compiler identification is MSVC 19.29.30145.0
-- The CXX compiler identification is MSVC 19.29.30145.0
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working C compiler: C:/Program Files (x86)/Microsoft Visual Studio/2019/Community/VC/Tools/MSVC/14.29.30133/bin/Hostx64/x64/cl.exe - skipped
(...)
cl /c /IC:\Users\lambe\work\repository\bar\tutu /IC:\Users\lambe\work\repository\bar\. /IC:\Users\lambe\work\repository\bar\Foo\include/Wall /WX /diagnostics:column /Od /D _MBCS /D WIN32 /D _WINDOWS /D STAND_ALONE /D "CMAKE_INTDIR=\"Debug\"" /Gm- /MD /GS /fp:precise /Zc:wchar_t /Zc:forScope /Zc:inline /Fo"bar.dir\Debug\\" /Fd"bar.dir\Debug\vc142.pdb" /external:W4 /Gd /TC /wd4996 /wd4820 /wd5045 /wd4668 /errorReport:queue C:\Users\lambe\work\repository\bar\main_bar.c
main_bar.c
Generating Code...
Link:
C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.29.30133\bin\HostX64\x64\link.exe /ERRORREPORT:QUEUE /OUT:"C:\Users\lambe\work\repository\bar\tutu\Debug\bar.exe" /INCREMENTAL /ILK:"bar.dir\Debug\bar.ilk" /NOLOGO ..\Foo\x64\foo.lib kernel32.lib user32.lib gdi32.lib winspool.lib shell32.lib ole32.lib oleaut32.lib uuid.lib comdlg32.lib advapi32.lib /MANIFEST /MANIFESTUAC:"level='asInvoker' uiAccess='false'" /manifest:embed /DEBUG /PDB:"C:/Users/lambe/work/repository/bar/tutu/Debug/bar.pdb" /SUBSYSTEM:CONSOLE /TLBID:1 /DYNAMICBASE /NXCOMPAT /IMPLIB:"C:/Users/lambe/work/repository/bar/tutu/Debug/bar.lib" /MACHINE:X64 /machine:x64 bar.dir\Debug\main_bar.obj
bar.dir\Debug\main_bar.obj
main_bar.obj : error LNK2019: unresolved external symbol foo_function referenced in function main [C:\Users\lambe\work\repository\bar\tutu\bar.vcxproj]
C:\Users\lambe\work\repository\bar\tutu\Debug\bar.exe : fatal error LNK1120: 1 unresolved externals [C:\Users\lambe\work\repository\bar\tutu\bar.vcxproj]
The compilation step is working great, the issue is during the linking step.
EDIT:
Ok after the comment from Ben Voigt, I choose to explore the solution to use the gcc/g++ compiler from mingw instead of using the CL/Visual Studio thing.
The new test procedure :
$ cmake .. -G "MinGW Makefiles" && cmake --build . -v
(...)
C:\MinGW\bin\gcc.exe -DSTAND_ALONE #CMakeFiles/bar.dir/includes_C.rsp -MD -MT CMakeFiles/bar.dir/main_bar.c.obj -MF
CMakeFiles\bar.dir\main_bar.c.obj.d -o CMakeFiles\bar.dir\main_bar.c.obj -c C:\Users\lambe\work\repository\bar\main_bar.c
[100%] Linking C executable bar.exe
"C:\Program Files\CMake\bin\cmake.exe" -E cmake_link_script CMakeFiles\bar.dir\link.txt --verbose=1
"C:\Program Files\CMake\bin\cmake.exe" -E rm -f CMakeFiles\bar.dir/objects.a
C:\MinGW\bin\ar.exe qc CMakeFiles\bar.dir/objects.a #CMakeFiles\bar.dir\objects1.rsp
C:\MinGW\bin\gcc.exe -Wl,--whole-archive CMakeFiles\bar.dir/objects.a -Wl,--no-whole-archive -o bar.exe -Wl,--out-implib,libbar.dll.a -Wl,--major-image-version,0,--minor-image-version,0 #CMakeFiles\bar.dir\linklibs.rsp
CMakeFiles\bar.dir/objects.a(main_bar.c.obj):main_bar.c:(.text+0x4f4e): undefined reference to `foo_function'
collect2.exe: error: ld returned 1 exit status
CMakeFiles\bar.dir\build.make:830: recipe for target 'bar.exe' failed
mingw32-make.exe[2]: *** [bar.exe] Error 1
mingw32-make.exe[2]: Leaving directory 'C:/Users/lambe/work/repository/bar/test'
CMakeFiles\Makefile2:81: recipe for target 'CMakeFiles/bar.dir/all' failed
mingw32-make.exe[1]: *** [CMakeFiles/bar.dir/all] Error 2
mingw32-make.exe[1]: Leaving directory 'C:/Users/lambe/work/repository/bar/test'
Makefile:89: recipe for target 'all' failed
mingw32-make.exe: *** [all] Error 2
Ok the result is the same but at least, the command line and tools are more familiar for me.
I cannot find any reference to the foo library in the command line. Then I check the file linklibs.rsp and here we are :
$ cat CMakeFiles/bar.dir/linklibs.rsp
-lm *Foo/x64/foo.lib* -lkernel32 -luser32 -lgdi32 -lwinspool -lshell32 -lole32 -loleaut32 -luuid -lcomdlg32 -ladvapi32
Is it the expected result?