On 2015-04-28 08:56+0200 Nils Gladitz wrote:
On 04/28/2015 01:20 AM, Alan W. Irwin wrote:
On 2015-04-24 12:33-0700 Alan W. Irwin wrote:
This should be a pretty common issue on Linux since it is quite
typical there that downstream packaging splits up binary results into
different packages. Therefore, I assume there is a CMake solution to
this issue, and I would appreciate those who know that solution to
speak up.
I'd go with what Alex suggested in his reply.
In effect it is what e.g. Qt5 does (though they don't use cmake to generate
the exports obviously and they provide additional package configuration files
which you can omit).
The umbrella configuration file can use the component specification given to
find_package() to iterate over the required target export files.
There is an example of this here (scroll down to "If COMPONENTS are specified
when the downstream uses[...]"):
@Nils: the origin of the code right below "If COMPONENTS..." is not
clear. Is that code that should be supplied by a package creator or code that
should be implemented by every find_package user? And if it should be
supplied by a package creator, does the install(EXPORT...) signature
generate that code automatically, does one of the helper functions
that are available generate that code, or do I (as package creator)
have to supply that code some other way?
http://www.cmake.org/cmake/help/v3.2/manual/cmake-packages.7.html#creating-packages
@Alex: Sorry I missed your reply until now.
@Alex or Nils:
The problem with the URL provided by Nils is only one library is used
in the example so I don't understand exactly what you guys are
suggesting for the multiple library/component case.
For example, are you recommending
install(TARGETS plplot1 EXPORT export_plplot ...)
[...]
install(TARGETS plplotN EXPORT export_plplot ...)
for N installed libraries followed by
install(EXPORT export_plplot DESTINATION ${LIB_DIR}/cmake/plplot)
? That is the current pattern I am using with one overall export name
called "export_plplot". Or would you recommend this different pattern
install(TARGETS plplot1 EXPORT export_plplot1 ...)
install(EXPORT export_plplot1 DESTINATION ${LIB_DIR}/cmake/plplot)
[...]
install(TARGETS plplotN EXPORT export_plplotN ...)
install(EXPORT export_plplotN DESTINATION ${LIB_DIR}/cmake/plplot)
(i.e., N pairs of install(TARGETS...) install(EXPORT...) signatures
with each pair having a unique export name)?
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); the Time
Ephemerides project (timeephem.sf.net); PLplot scientific plotting
software package (plplot.sf.net); the libLASi project
(unifont.org/lasi); the Loads of Linux Links project (loll.sf.net);
and the Linux Brochure Project (lbproject.sf.net).
__________________________
Linux-powered Science
__________________________
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