build - CMake preload script for cache -

i fire cmake -c mysettings.cmake.

the content of myfile.cmake is

set(cmake_install_prefix "c:/install/mylib" string) 

everything generated seems -c mysettings.cmake variable not set. still installed in default directory.

cmake prints message "loading initial cache file ../../script/cmake/mysettings.cmake" without error.

the full call:

cmake -c ../../script/cmake/mysettings.cmake -g "visual studio 9 2008" ../../source/mylib 

is there wrong syntax?

from cmake manual:

the given file should cmake script containing set commands use cache option, not cache-format file.

so myfile.cmake needs this:

set(cmake_install_prefix "c:/install/mylib" cache path "")