# How to mark GMock as a required component
**URL:** https://discourse.cmake.org/t/how-to-mark-gmock-as-a-required-component/10106
**Category:** Usage
**Tags:** os:linux
**Created:** [February 15, 2024, 4:28pm UTC](https://discourse.cmake.org/t/how-to-mark-gmock-as-a-required-component/10106 "2024-02-15T16:28:02Z")
**Posts on this page:** 6
**Page:** 1
### Author:  [@Ryanf55](https://discourse.cmake.org/u/Ryanf55)
#### Post date: [February 15, 2024, 4:28pm UTC](https://discourse.cmake.org/t/how-to-mark-gmock-as-a-required-component/10106/1 "2024-02-15T16:28:03Z")
I’m using CMake 3.27 and use both GTest and GMock in a package.
There are a few options I’ve seen to pull this in:
1. With the FindGTest module
```cmake
include(FindGTest)
```
1. Directly with find\_package
```cmake
find_package(GTest CONFIG REQUIRED COMPONENTS GTest GMock)
```
1. With FetchContent as recommended by GTest, which doesn’t allow us to use the system package version
On Ubuntu 22, `libgtest-dev` and `libgmock-dev` are distributed as separate packages. It’s common to have `libgtest-dev` and not `libgmock-dev`. In that situation,
- `GTest::gtest` will exist
- `GTest::gmock` will not exist
The `libgmock-dev` package comes with `/usr/lib/x86_64-linux-gnu/cmake/GTest/GMockTargets.cmake`
My usage:
```auto
add_executable(MyTest
main.cpp
)
set(CMAKE_FIND_DEBUG_MODE ON)
find_package(GTest CONFIG REQUIRED COMPONENTS GTest GMock)
set(CMAKE_FIND_DEBUG_MODE OFF)
target_link_libraries(MyTest
PRIVATE
${PROJECT_NAME}::MyLibrary
GTest::gtest
GTest::gmock
)
```
Logs when building tests:
```auto
CMake Debug Log at testbench/CMakeLists.txt:10 (find_package):
/usr/lib/x86_64-linux-gnu/cmake/GTest/GTestConfig.cmake
-- Configuring done (0.3s)
CMake Error at testbench/CMakeLists.txt:13 (target_link_libraries):
Target "MyTest" links to:
GTest::gmock
but the target was not found. Possible reasons include:
* There is a typo in the target name.
* A find_package call is missing for an IMPORTED target.
* An ALIAS target is missing.
```
Why is there not an error in find\_package when I specify `GMock` as a required component? I would expect an error that the component was not found and a find\_package result of failure.
---
### Author:  [@ClausKlein](https://discourse.cmake.org/u/ClausKlein)
#### Post date: [February 15, 2024, 5:00pm UTC](https://discourse.cmake.org/t/how-to-mark-gmock-as-a-required-component/10106/2 "2024-02-15T17:00:23Z")
### It works fine:
```auto
$ cmake -B build -S . -G Ninja --debug-find-pkg=GTest
Running with debug output on for the 'find' commands for package(s) GTest.
CMake Debug Log at /home/klein_cl/.local/lib/python3.10/site-packages/cmake/data/share/cmake-3.28/Modules/CMakeFindDependencyMacro.cmake:76 (find_package):
find_package considered the following paths for FindThreads.cmake:
The file was found at
/home/klein_cl/.local/lib/python3.10/site-packages/cmake/data/share/cmake-3.28/Modules/FindThreads.cmake
Call Stack (most recent call first):
/usr/lib/x86_64-linux-gnu/cmake/GTest/GTestConfig.cmake:39 (find_dependency)
CMakeLists.txt:6 (find_package)
CMake Debug Log at CMakeLists.txt:6 (find_package):
/usr/lib/x86_64-linux-gnu/cmake/GTest/GTestConfig.cmake
-- Configuring done (0.0s)
-- Generating done (0.0s)
-- Build files have been written to: /home/klein_cl/Workspace/cpp/test/build
$ tree /usr/lib/x86_64-linux-gnu/cmake/GTest/
/usr/lib/x86_64-linux-gnu/cmake/GTest/
├── GMockTargets-none.cmake
├── GMockTargets.cmake
├── GTestConfig.cmake
├── GTestConfigVersion.cmake
├── GTestTargets-none.cmake
└── GTestTargets.cmake
0 directories, 6 files
```
---
### Author:  [@Ryanf55](https://discourse.cmake.org/u/Ryanf55)
#### Post date: [February 17, 2024, 5:06pm UTC](https://discourse.cmake.org/t/how-to-mark-gmock-as-a-required-component/10106/3 "2024-02-17T17:06:09Z")
> [@ClausKlein](#):
>
> `-debug-find-pkg=GTes`
Uninstall GMock, and try again? That’s when it exhibited poor behavior for me.
---
### Author:  [@ClausKlein](https://discourse.cmake.org/u/ClausKlein)
#### Post date: [February 17, 2024, 6:59pm UTC](https://discourse.cmake.org/t/how-to-mark-gmock-as-a-required-component/10106/4 "2024-02-17T18:59:57Z")
I guess it is a problem with [find\_dependency()](https://cmake.org/cmake/help/latest/module/CMakeFindDependencyMacro.html#cmakefinddependencymacro)
Replace in `/usr/lib/x86_64-linux-gnu/cmake/GTest/GTestConfig.cmake` `find_dependency(x)` with `find_package(x REQUIRED)` and try again.
---
### Author:  [@Ryanf55](https://discourse.cmake.org/u/Ryanf55)
#### Post date: [February 28, 2024, 4:22am UTC](https://discourse.cmake.org/t/how-to-mark-gmock-as-a-required-component/10106/5 "2024-02-28T04:22:34Z")
> [@ClausKlein](#):
>
> /usr/lib/x86\_64-linux-gnu/cmake/GTest/GTestConfig.cmake
Also, it seems odd at the end of that file, it says that the `GMockTargets.cmake` file is optional
```auto
include("${CMAKE_CURRENT_LIST_DIR}/GMockTargets.cmake" OPTIONAL)
```
Shouldn’t the optional keyword be added if `_FIND_COMPONENTS` ie, `GTest_FIND_COMPONENTS` is missing GMock?
Reference:
[https://cmake.org/cmake/help/latest/command/find\_package.html#package-file-interface-variables](https://cmake.org/cmake/help/latest/command/find_package.html#package-file-interface-variables)
---
### Author:  [@marlord](https://discourse.cmake.org/u/marlord)
#### Post date: [June 19, 2025, 8:38pm UTC](https://discourse.cmake.org/t/how-to-mark-gmock-as-a-required-component/10106/6 "2025-06-19T20:38:59Z")
Yes it seems like there is a problem with finding the GMock. I tried several combinations and the finding does not create either the GMock Target or the {} variable. At the end, the workaround is to just add the “gmock” as the linking dependency and it will grab it with a flag…