Compile error with CONFIG+="headless": src/util.cpp: variable ‘QRegularExpression rx1’ has initializer but incomplete type

[hoffie]

Describe the bug

Report by @corrados as part of #2267:

Unforunately, the current Jamulus source code does not compile on my Raspberry Pi with the following error message:

To Reproduce

• distributions/raspijamulus.sh
• Any current build with CONFIG+="headless"

Expected behavior

Sucessful compile

Screenshots

src/util.cpp: In static member function ‘static bool NetworkUtil::ParseNetworkAddress(QString, CHostAddress&, bool)’:
src/util.cpp:708:28: error: variable ‘QRegularExpression rx1’ has initializer but incomplete type
  708 |     QRegularExpression rx1 ( "^\\[([^]]*)\\](?::(\\d+))?$" ); // [addr4or6] or [addr4or6]:port
      |                            ^
src/util.cpp:709:28: error: variable ‘QRegularExpression rx2’ has initializer but incomplete type
  709 |     QRegularExpression rx2 ( "^([^:]*)(?::(\\d+))?$" );       // addr4 or addr4:port or host or host:port
      |                            ^
src/util.cpp:713:29: error: variable ‘QRegularExpressionMatch rx1match’ has initializer but incomplete type
  713 |     QRegularExpressionMatch rx1match = rx1.match ( strAddress );
      |                             ^~~~~~~~
src/util.cpp:714:29: error: variable ‘QRegularExpressionMatch rx2match’ has initializer but incomplete type
  714 |     QRegularExpressionMatch rx2match = rx2.match ( strAddress );
      |                             ^~~~~~~~
make: *** [Makefile:1762: util.o] Error 1

Operating system

Latest Raspbian (?)

Version of Jamulus

master

Additional context

[hoffie]

b31e650 updated the regular expression handling for Qt6 compatibility. While the newer class QRegularExpression should be supported in all Qt versions, compile seems to fail here.

The change seems to miss an include. Maybe specific Qt versions have a problem with this, while others (newers?) don't (maybe due to implicit includes). Going to submit a PR in a second.