Building Qt 6.6.0 from source on Mac

[KeithS]

I've been trying to instal Qt 6.6.0 on a Macbook (x86 cpu) with not much success. I have installed the prerequisites as described in the Qt docs (cnake, python3, ninja, node.js), the only difference is I am running Somona (OSX 14.0).

When I run ./configure -commercial -debug-and-release -opengl desktop -nomake examples -nomake tests, I get (after lots of cmake output):

-- Configuring incomplete, errors occurred!
See also "/Users/keith/Documents/C++Stuff/qt-everywhere-src-6.6.0/CMakeFiles/CMakeOutput.log".
See also "/Users/keith/Documents/C++Stuff/qt-everywhere-src-6.6.0/CMakeFiles/CMakeError.log".
CMake Error at qtbase/cmake/QtProcessConfigureArgs.cmake:1038 (message):
CMake exited with code 1.

Looking through the CMakeError.log file there are a few worrying messages like:

ld: library 'c++' not found
clang: error: linker command failed with exit code 1 (use -v to see invocation)

Has anyone successfully built Qt 6.6.0 from source on OSX 14 / Xcose 15.0.1 ?

[KeithS]

Nothing stands out clearly in those files. Trying with 6.6.1 I get:

-- Configuring incomplete, errors occurred!
See also "/Users/keith/Documents/C++Stuff/qt6-build/CMakeFiles/CMakeOutput.log".
See also "/Users/keith/Documents/C++Stuff/qt6-build/CMakeFiles/CMakeError.log".
CMake Error at /Users/keith/Documents/C++Stuff/qt-everywhere-src-6.6.1/qtbase/cmake/QtProcessConfigureArgs.cmake:1040 (message):
CMake exited with code 1.

Again not a helpful error message, line 1040 of that file is just printing the error...

[Axel Spoerl]

@KeithS
Please check the $LIBRARY_PATH environment variable. The path to the C++ library is probably missing.

[SGaist]

Hi,

In addition to @Axel-Spoerl, did you also install the command line tools from Xcode ?

[KeithS]

@Axel-Spoerl What sets LIBRARY_PATH? It's not an env var I've ever had to set before, and certainly wasn't required for Qt 5.15.15. But I'll give it a try

I believe the linker has changed in XCode 15, according to this thread:
https://developer.apple.com/forums/thread/715385
which may explain the current failure.

[SGaist]

Then you might want to build a more recent version than 6.6.0.

By the way, why not use the online installer to install Qt ?

[KeithS]

@SGaist there is a more recent version than 6.6.0? Reason to compile from source is to fix a couple of bugs - and I need to do it for eg win32 so would like to be consistent.

[KeithS]

Setting LIBRARY_PATH had no effect. The last messages from configure are:

RegularExpression::compile(): Nested *?+.
RegularExpression::compile(): Error in compile.
CMake Error at qtwebengine/src/CMakeLists.txt:152 (if):
if given arguments:

"NOT" "Gn_FOUND" "OR" "Gn_EXECUTABLE" "MATCHES" "^/Users/keith/Documents/C++Stuff/qt-everywhere-src-6.6.0/qtwebengine/install"

Regular expression
"^/Users/keith/Documents/C++Stuff/qt-everywhere-src-6.6.0/qtwebengine/install"
cannot compile

-- Configuring incomplete, errors occurred!
See also "/Users/keith/Documents/C++Stuff/qt-everywhere-src-6.6.0/CMakeFiles/CMakeOutput.log".
See also "/Users/keith/Documents/C++Stuff/qt-everywhere-src-6.6.0/CMakeFiles/CMakeError.log".
CMake Error at qtbase/cmake/QtProcessConfigureArgs.cmake:1038 (message):
CMake exited with code 1.

[Axel Spoerl]

@KeithS
That looks like a local configuration error.
Have you done all the steps outlined here?

[KeithS]

Yes I believe so - as in the original post: "I have installed the prerequisites as described in the Qt docs (cnake, python3, ninja, node.js), the only difference is I am running Somona (OSX 14.0)."

The big problem is that finding the real error is made more difficult by the many errors emitted by the config tests.

[Axel Spoerl]

@KeithS
CMakeError.log and CMakeOutput.log should contain the root cause.
Have you found anything there?

[KeithS]

Nothing stands out clearly in those files. Trying with 6.6.1 I get:

-- Configuring incomplete, errors occurred!
See also "/Users/keith/Documents/C++Stuff/qt6-build/CMakeFiles/CMakeOutput.log".
See also "/Users/keith/Documents/C++Stuff/qt6-build/CMakeFiles/CMakeError.log".
CMake Error at /Users/keith/Documents/C++Stuff/qt-everywhere-src-6.6.1/qtbase/cmake/QtProcessConfigureArgs.cmake:1040 (message):
CMake exited with code 1.

Again not a helpful error message, line 1040 of that file is just printing the error...

[hskoglund]

Hi, I'm guessing the problem is that subdirectory named C++Stuff, you should see errors like this:
list sub-command FILTER, mode REGEX failed to compile regex
"(.+/(ui_)[^/]+.h|/Users/keith/Documents/C++Stuff/qt-everywhere-src-6.6.1/qtwebview/src/webview(/.+)?/doc/+.h)".

Try renaming that directory to something without ++, e.g. CPlusPlusStuff

Note: just guessing :-)

[KeithS]

You're spot on. Moving the qt6 source and the build dir to another directory (without the C++ in path) and configure runs without error!