[CMake] User defined variable not propagating into subdirs

[Alan W. Irwin]

On 2007-11-16 11:49-0000 Stephen Collyer wrote:

> 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)

Bill has already given you a global way to set static or shared libraries,
but what caught my eye here is that your LIB_TYPE was not propagating to
lower directories as it should.

I successfully use such propagation of variables all the time with
ADD_SUBDIRECTORY. Are you using SUBDIRS instead?  I don't use it, but I have
heard it does things quite differently than ADD_SUBDIRECTORY. SUBDIRS is not
officially deprecated yet, but the words about it in the man page indicate
it is close to deprecation.

Alan

__________________________
Alan W. Irwin

Astronomical research affiliation with Department of Physics and Astronomy,
University of Victoria (astrowww.phys.uvic.ca).

Programming affiliations with the FreeEOS equation-of-state implementation
for stellar interiors (freeeos.sf.net); PLplot scientific plotting software
package (plplot.org); the libLASi project (unifont.org/lasi); the Loads of
Linux Links project (loll.sf.net); and the Linux Brochure Project
(lbproject.sf.net).
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