#293 make error <QtCORE> not found

[Anonymous]

I'm trying to install gnuplot-5-4.10 on a macbook air with MAC OS Catalina. I get the following error:

eriknelson@Eriks-MacBook-Air gnuplot-5.4.10 % make
.
.
.
qtterminal/qt_term.cpp:51:10: fatal error: 'QtCore' file not found

include <qtcore></qtcore>

     ^~~~~~~~

1 error generated.
make[4]: *** [qtterminal/qt_term.o] Error 1
make[3]: *** [all-recursive] Error 1
make[2]: *** [all] Error 2
make[1]: *** [all-recursive] Error 1
make: *** [all] Error 2
eriknelson@Eriks-MacBook-Air gnuplot-5.4.10 %

I have both hombrew and XQuartz installed. I'm not sure what to do about this. I've also tried installing the binary for MacOS Catalina, but my computer won't let me open the package saying that it can't verify that the package does not contain malware.

Any suggestions?

[Ethan Merritt]

That appears to indicate that the Qt support packages are not installed.
The text below is taken from gnuplot's INSTALL file for version 6, but may well be useful also for building version 5:

macOS + homebrew
----------------

  As of the time of writing (Feb 2023) homebrew provides a bottled gnuplot
  with Qt support.  However it was not built with all the optional features
  or terminals that you might want.  This is a quick summary of what is
  needed to configure and build from source.

  If you have gnuplot installed from homebrew you can do
        brew info gnuplot
  to see that it has already installed these dependencies:
        Build: pkg-config ✔
        Required: gd ✔, libcerf ✔, lua ✔, pango ✔, qt@5 ✔, readline ✔
  Otherwise you must install these first.  Depending on what you intend to
  add to the configuration you may have to install other dependencies also.

  Gnuplot's default ./configure and make will automatically compile gnuplot
  support for the x11 terminal and for the qt terminal if it finds the Qt
  libraries.  However, it seems that the Qt installed by homebrew is not
  found automatically.   If you say, for example,  ./configure --with-qt
  you get a problem like "fatal error: 'QtCore' file not found".
  To solve this you can add the homebrew installation path to the environment
  prior to running ./configure so that it knows where to look:

        $ CXXFLAGS=' -std=c++11 ' \
          PKG_CONFIG_PATH='/opt/homebrew/opt/qt5/lib/pkgconfig' \
          configure --with-qt

  If for some reason your qt5/lib/pkgconfig is installed somewhere else,
  change that command accordingly.

  Look carefully at the summary of terminal support printed out by the
  configure command.  If all looks well, continue with

        $ make
        $ make check
        $ sudo make install

[Ethan Merritt]

Ticket moved from /p/gnuplot/bugs/2698/

Can't be converted:

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