d1020930db
Setting CMAKE_DISABLE_FIND_PACKAGE_xxx flag should make find_package not doing anything, but this does not seem to work with older versions of CMake. Anyway, we can test this flag and make sure that we don't call find_package in that case. Also includes a check for both upper- and same-case versions of found flag, as some modules, most notably Boost, does not set the upper-case version of their _FOUND flag; this tests for both.