ECMQueryQt

This module can be used to query the installation paths used by Qt.

For Qt5 this uses qmake, and for Qt6 this used qtpaths (the latter has built-in support to query the paths of a target platform when cross-compiling).

This module defines the following function:

ecm_query_qt(<result_variable> <qt_variable> [TRY])

Passing TRY will result in the method not making the build fail if the executable used for querying has not been found, but instead simply print a warning message and return an empty string.

Example usage:

include(ECMQueryQt)
ecm_query_qt(bin_dir QT_INSTALL_BINS)

If the call succeeds ${bin_dir} will be set to <prefix>/path/to/bin/dir (e.g. /usr/lib64/qt/bin/).

Since: 5.93