Unknown type name: QProcess

[IanB]

Using clangd on a mac, the following code gives me an error: Unknown type name: QProcess.
Clangd presents no error for the #include <QProcess>, and the QProcess files are in the Qt Core folder.
I have tried:
a. Upgrading/downgrading Xcode
b. Qt 6.7.0, Qt 6.8.0, Qt6.9.0
c. Compiling without clangd.
The compile always fails with this error.

#include <QObject>
#include <QProcess>

class ProcessTest : public QObject
{
    Q_OBJECT
public:
    explicit ProcessTest(QObject *parent = nullptr);

private:
    QProcess test;

};

I have included in my CMakeLists.txt

find_package(Qt6 REQUIRED COMPONENTS Quick Core)

target_link_libraries(appTest
    PRIVATE Qt6::Quick Qt6::Core
)

All the examples of using QProcess seem the same, so I have run out of ideas. Any suggestions?

[jsulm]

@IanB So, your application is building and running fine, but QtCreator shows that error? This is the code model, which simetimes produces false positives.

[JonB]

@IanB said in Unknown type name: QProcess:

The compile always fails with this error.

@jsulm is asking/guessing whether this is a compiler error or just an error shown to you in the editor but not when you actually compile? Please answer clearly.

[cristian-adam]

You can get CMake to be verbose with the build process by going to Project Mode > Build Steps > CMake arguments and add --verbose.

Then you can see the commands it tries to build.

Building with Qt 6.7, 6.8 or 6.9 on macOS with Xcode is something that works just fine.

I can think of only having to "activate" the Command Line Tools for Xcode. Please do try to:

1. Open Xcode
2. Go to Preferences Cmd + ,
3. Go to Location
4. At the Command Line Tools: combobox select something there. I have Xcode 16.2 (16C5032a).