Install libgpgmepp-dev by entering the following commands in the terminal:
sudo apt update sudo apt install libgpgmepp-dev
Description:
C++ and Qt bindings for GPGME (development files)
GpgME++ (aka GpgMEpp) is a C++ wrapper (or C++ bindings) for the GnuPG project's GPGME (GnuPG Made Easy) library. . QGpgME is a library that provides GPGME integration with QEventLoop and some Qt datatypes (e.g. QByteArray). . This package contains the headers and other files needed to compile against either of these libraries.
Homepage: https://www.gnupg.org/related_software/gpgme/
Version: 1.10.0-1ubuntu1
Section: libdevel