| CPACK_SET_DESTDIR |
| ----------------- |
| |
| Boolean toggle to make CPack use DESTDIR mechanism when packaging. |
| |
| DESTDIR means DESTination DIRectory. It is commonly used by makefile |
| users in order to install software at non-default location. It is a |
| basic relocation mechanism that should not be used on Windows (see |
| CMAKE_INSTALL_PREFIX documentation). It is usually invoked like this: |
| |
| :: |
| |
| make DESTDIR=/home/john install |
| |
| which will install the concerned software using the installation |
| prefix, e.g. "/usr/local" prepended with the DESTDIR value which |
| finally gives "/home/john/usr/local". When preparing a package, CPack |
| first installs the items to be packaged in a local (to the build tree) |
| directory by using the same DESTDIR mechanism. Nevertheless, if |
| CPACK_SET_DESTDIR is set then CPack will set DESTDIR before doing the |
| local install. The most noticeable difference is that without |
| CPACK_SET_DESTDIR, CPack uses CPACK_PACKAGING_INSTALL_PREFIX as a |
| prefix whereas with CPACK_SET_DESTDIR set, CPack will use |
| CMAKE_INSTALL_PREFIX as a prefix. |
| |
| Manually setting CPACK_SET_DESTDIR may help (or simply be necessary) |
| if some install rules uses absolute DESTINATION (see CMake INSTALL |
| command). However, starting with CPack/CMake 2.8.3 RPM and DEB |
| installers tries to handle DESTDIR automatically so that it is seldom |
| necessary for the user to set it. |
