For example, I can't install package qcad because of error: "can't find qdict.h".
How can I find the package which provides the file qdict.h so I can install the package qcad?

  • what package??? – Joe Mar 28 '13 at 7:42
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    @Joe, I illustrate: I want to install qcad, but it doesn't compile because can't find file qdict.h. I want to know which package contains that file. I've tried to google, but found nothing. – Eddy_Em Mar 28 '13 at 7:45
  • is it an overlay or regular package that you downloaded – Joe Mar 28 '13 at 7:50
  • perhaps emerge -av qt – daisy Mar 28 '13 at 7:53
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    see also unix.stackexchange.com/q/82021/13011 – Nikos Alexandris Jul 8 '13 at 15:51

You may use the e-file command from the pfl package (emerge -av app-portage/pfl) to search by package contents.


Alternatively, you may use an online database.

Regarding the qcad package specifically, you probably need the Qt4 package. IIRC, use emerge -av x11-libs/qt-gui (If that doesn't work out, try searching for QT packages. Use this query: emerge -s qt.)

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    To be more precise, pfl provides the command e-file – Tobias Kienzler Nov 5 '13 at 11:04
  • FYI, the e-file command simply queries the very same online database linked in the answer. It's called the Portage File List. – daveloyall Jan 16 '20 at 23:26

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