Just a reminder for myself, because I will certainly stumble over it again in the future:
One of my projects was using Qt and was split into several files and subfolders, with several CMakeLists.txt files to it. In it, I made all the required CMake-Qt-Magic, so that CMake and Qt with MOC was working (too much for here, look it up in the source code… — and everything built fine.
Then I took this as a foundation for a minimalistic Qt test program: Just one source code file (main.cpp), no header file, and one CMakeLists.txt, all in a single directory. Additionally, I slimmed down the CMakeLists.txt and adjusted the values in it… The CMake generator was happy, but Visual Studio failed to build the solution with an error message like this:
The file includes the moc file “moc_main.cpp”, but could not find header “main{.h,.hh,.h++,.hm,.hpp,.hxx,.in,.txx}”.
After some investigation, I discovered my mistake. Taken from some StackOverflow posts, which had it from the official documentation (of Qt or CMake):
-
If Q_OBJECT is in the foo.h (i.e. QObject is declared in the header file),
then don’t forget to add#include "moc_foo.cpp"in the corresponding foo.cpp, preferably at the end of the file. -
If Q_OBJECT is in the foo.cpp (i.e. QObject is declared in the source file),
then don’t forget to add#include "foo.moc"(in foo.cpp itself), preferably at the end of the file.
So, after changing #include "moc_main.cpp" to #include "main.moc" in my main.cpp, all went smooth.
Addendum: Hm, I’m not paying much attention to my own writings, it seems: I’ve already mentioned this (Q_OBJECT and moc_*/*.moc files) in a previous entry… *sigh*
Film & Television (54)
How To (63)
Journal (17)
Miscellaneous (4)
News & Announcements (21)
On Software (12)
Projects (26)