change of build prefix does not work

[zfred68]

Eg
$cmake -DCMAKE_PREFIX_PATH=/usr ..
its ignored ....
-- Libraries will be installed in /usr/local/lib64
-- Header files will be installed in /usr/local/include
-- Binaries will be installed in /usr/local/bin
-- Man pages will be installed in /usr/local/share/man

how to get it into /usr/lib64 or indeed anything else?

on reading the cmakelists.txt lines..
message (STATUS "Libraries will be installed in ${CMAKE_INSTALL_FULL_LIBDIR}")

guess what ? -DCMAKE_INSTALL_FULL_LIBDIR=whatever
don't work either!!!

using cmake version 3.21.3

[wolfv]

Using -DCMAKE_INSTALL_PREFIX=... works perfectly fine for us.