[CMake] Searching once

[Al Niessner]

Thank you very much for your help.

On Wed, 2014-01-15 at 16:11 +0000, Williams, Norman K wrote:
> You want the load_cache command:
> 
> * load_cache: Load in the values from another project's CMake cache.
>   load_cache(pathToCacheFile READ_WITH_PREFIX
>              prefix entry1...)
> Read the cache and store the requested entries in variables with their
> name prefixed with the given prefix. This only reads the values, and does
> not create entries in the local project's cache.
> 
>   load_cache(pathToCacheFile [EXCLUDE entry1...]
>              [INCLUDE_INTERNALS entry1...])
> Load in the values from another cache and store them in the local
> project's cache as internal entries. This is useful for a project that
> depends on another project built in a different tree. EXCLUDE option can
> be used to provide a list of entries to be excluded. INCLUDE_INTERNALS can
> be used to provide a list of internal entries to be included. Normally, no
> internal entries are brought in. Use of this form of the command is
> strongly discouraged, but it is provided for backward compatibility.
> 
> To use this, the other project must at least already have been configured
> -- otherwise it has no CMakeCache.txt for it to read.
> 
> 
> So you'd do something like:
> 
> load_cache(${OTHER_PROJECT_CMAKECACHE_PATH} READ_WITH_PREFIX
> OTHER_PROJECT DEPENDENCY_DIR)
> set(SOMETHING_DIR ${OTHER_PROJECT_DEPENDENCY_DIR}
> 
> 
> On 1/14/14 5:47 PM, "Al Niessner" <Albert.F.Niessner at jpl.nasa.gov> wrote:
> 
> >
> >I am fairly new to cmake but have been through the documentation a dozen
> >or more times and found answers to all of my previous questions. I have
> >googled for another small batch of questions. Now I am stuck, mostly
> >because I am not sure what keywords to use in my search, and would like
> >a little help.
> >
> >Is it possible to have a dependent project use configuration information
> >from a previously installed project?
> >
> >I have the parent project A that searches my compute node and finds all
> >kinds of fun packages like HDF, boost, xerces, etc. It then compiles
> >into a shared library and deployed to /my/product/{lib,doc,include,...}.
> >
> >Now, I have project B that depends on what was generated in project A.
> >So, it now searches my compute node and finds an older version of HDF,
> >boost, and/or xerces. Old enough that there is an API change. Well, that
> >does not work so well and can even be pathological enough to go
> >unnoticed for a long time.
> >
> >So, what I want is project B to look into /my/product/cmake and get all
> >of the search paths from there instead of project B searching my compute
> >node like project A did.
> >
> >In other words, when I do a 'make install' for project A, I want a
> >subdirectory or file that has information in it that CMake can
> >automatically ingest rather than search using Find*.cmake. Thus, my
> >dependencies remain consistent.
> >
> >Is it possible to have a dependent project use configuration from a
> >previously installed project?
> >
> >--
> >Al Niessner
> >818.354.0859
> >
> >--------
> >|  dS  | >= 0
> >--------
> >
> >--
> >
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> 
> 
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-- 
Al Niessner
818.354.0859

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