[CMake] User defined variable not propagating into subdirs

[Stephen Collyer]

I have a top-level cmake list file with this in it:

OPTION (MDP_BUILD_SHARED_LIBS "Build Shared Libraries" ON)
SET (LIB_TYPE STATIC)
IF (MDP_BUILD_SHARED_LIBS)
  SET (LIB_TYPE SHARED)
  IF (WIN32)
    ADD_DEFINITIONS("-DMDP_BUILD_SHARED_LIBS")
  ENDIF (WIN32)
ENDIF (MDP_BUILD_SHARED_LIBS)

In a lower subdirectory, I have this to build a library:

ADD_LIBRARY(Test ${LIB_TYPE} Test.cpp)

the idea being that I can drive the generation of shared/static
libraries via the setting of the MDP_BUILD_SHARED_LIBS setting
which defaults to ON. However if I run cmake in an out-of-source
build from scratch and run a "make all", it seems that LIB_TYPE
is'nt being seen inside the lower subdirs - I've tested this by
adding "SET (LIB_TYPE SHARED)" explicitly to the library cmake
list file, then it build a shared library.

Can someone explain what's going on here. I'm beginning to
tear my hair out.

And for added bonus: is there a cmake log file generated anywhere
so I can see what it thinks it doing ? I can't find one anywhere.

-- 
Regards

Steve Collyer
Netspinner Ltd