cmake's CMAKE_TOOLCHAIN_FILE being ignored

Question

cmake is ignoring my toolchain file for some reason:

lynxos.cmake:

set(CMAKE_SYSTEM_NAME LynxOS)
set(CMAKE_CROSSCOMPILING TRUE)
set(CMAKE_CXX_COMPILER /usr/los178/2.3.0/x86_dev/cdk/linux-coff-x86/usr/bin/g++)
set(CMAKE_C_COMPILER /usr/los178/2.3.0/x86_dev/cdk/linux-coff-x86/bin/gcc)
set(CMAKE_FIND_ROOT_PATH /usr/los178/2.3.0/x86_dev/cdk/linux-coff-x86/)
SET(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
SET(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)

the call to cmake:

cmake -DCMAKE_TOOLCHAIN_FILE=lynxos.cmake -DUSE_TINY_XML=TRUE

CMAKE_CXX_COMPILER is still defaulting to my default compiler. Setting the CMAKE_CXX_COMPILER using -D from the command line works but cmake gives a warning:

You have changed variables that require your cache to be deleted.
Configure will be re-run and you may have to reset some variables.
The following variables have changed:
CMAKE_C_COMPILER= <path to compiler>
CMAKE_CXX_COMPILER= <path to compiler>

then my other cmake variables become undefined.

tried deleting the CMakeCache.txt file. Not working. Using CMake 2.8.11. Any idea what's wrong?

Answer 1

CMake creates alot more than 1 cache file, I'd try first doing it from a completely different directory.