CMake : No such file or directory

[Osilos]

Hi,

I create the project by following this documentation : https://reactnative.dev/docs/the-new-architecture/create-module-library
So I use this to generate the project

npx create-react-native-library@latest

It throw me this error

> com.android.ide.common.process.ProcessException: ninja: Entering directory `C:\Users\Utilisateur\Applications\admob-ironsource-adapter\example\android\app\.cxx\Debug\696m3f6w\arm64-v8a'
  [0/2] Re-checking globbed directories...
  ninja: build stopped: .

  C++ build system [build] failed while executing:
      @echo off
      "C:\\Users\\Utilisateur\\AppData\\Local\\Android\\Sdk\\cmake\\3.22.1\\bin\\ninja.exe" ^
        -C ^
        "C:\\Users\\Utilisateur\\Applications\\admob-ironsource-adapter\\example\\android\\app\\.cxx\\Debug\\696m3f6w\\arm64-v8a" ^
        appmodules
    from C:\Users\Utilisateur\Applications\admob-ironsource-adapter\example\android\app
  ninja: error: mkdir(RNAdmobIronsourceAdapterSpec_autolinked_build/CMakeFiles/react_codegen_RNAdmobIronsourceAdapterSpec.dir/react/renderer/components/RNAdmobIronsourceAdapterSpec): No such file or directory

error Failed to install the app. Command failed with exit code 1: gradlew.bat app:installDebug -PreactNativeDevServerPort=8081 FAILURE: Build failed with an exception. * What went wrong: Execution failed for task ':app:buildCMakeDebug[arm64-v8a]'. > com.android.ide.common.process.ProcessException: ninja: Entering directory `C:\Users\Utilisateur\Applications\admob-ironsource-adapter\example\android\app\.cxx\Debug\696m3f6w\arm64-v8a' [0/2] Re-checking globbed directories... ninja: build stopped: . C++ build system [build] failed while executing: @echo off "C:\\Users\\Utilisateur\\AppData\\Local\\Android\\Sdk\\cmake\\3.22.1\\bin\\ninja.exe" ^ -C ^ "C:\\Users\\Utilisateur\\Applications\\admob-ironsource-adapter\\example\\android\\app\\.cxx\\Debug\\696m3f6w\\arm64-v8a" ^ appmodules from C:\Users\Utilisateur\Applications\admob-ironsource-adapter\example\android\app ninja: error: mkdir(RNAdmobIronsourceAdapterSpec_autolinked_build/CMakeFiles/react_codegen_RNAdmobIronsourceAdapterSpec.dir/react/renderer/components/RNAdmobIronsourceAdapterSpec): No such file or directory * Try: > Run with --stacktrace option to get the stack trace. > Run with --info or --debug option to get more log output. > Run with --scan to get full insights. > Get more help at https://help.gradle.org. BUILD FAILED in 13s.

When I look the path /react/renderer/components/RNAdmobIronsourceAdapterSpec didn't exist in the example folder, but it exist in the android folder in the root folder of the project.

I don't understand why CMake is looking for this code inside the example app, as it should get it from the library file in the android folder (the one in the root).

[Osilos]

After some digging, the problem is the path length.
I got this warning when building :

C/C++: CMake Warning in C:/app/admob-ironsource-adapter/android/generated/jni/CMakeLists.txt:
C/C++:   The object file directory
C/C++:     C:/app/admob-ironsource-adapter/example/android/app/.cxx/Debug/1i2916d5/x86_64/RNAdmobIronsourceAdapterSpec_autolinked_build/CMakeFiles/react_codegen_RNAdmobIronsourceAdapterSpec.dir/./
C/C++:   has 185 characters.  The maximum full path to an object file is 250
C/C++:   characters (see CMAKE_OBJECT_PATH_MAX).  Object file
C/C++:     react/renderer/components/RNAdmobIronsourceAdapterSpec/RNAdmobIronsourceAdapterSpecJSI-generated.cpp.o
C/C++:   cannot be safely placed under this directory.  The build may not work
C/C++:   correctly.

So the warning is confusing because it says the path is less than the maximum 250 characters, here it say 185.
If the warning say something above ~190 the build failed.
So I need to go under 190 and it finally work...