[CMake] CMAKE_COMPILER_IS_GNUC vs. CMAKE_COMPILER_IS_GNUCC
Todd Gamblin
tgamblin at llnl.gov
Mon Jul 5 01:46:15 EDT 2010
The documentation here:
http://www.cmake.org/cmake/help/cmake2.6docs.html#variable:CMAKE_COMPILER_IS_GNULANG
is in conflict with the documentation here:
http://www.cmake.org/Wiki/CMake_Useful_Variables
And this thread (though it's from 2008) seems to imply that the second link above is right, even though the first is more current:
http://www.mail-archive.com/cmake@cmake.org/msg16863.html
I'm using CMake 2.8.2, and I'm noticing that CMAKE_COMPILER_IS_GNUC is empty, which conflicts with the latest documentation on the wiki. This makes it hard to do things like this:
> for (lang C CXX Fortran)
> if (CMAKE_COMPILER_IS_GNU${lang})
> ...
> endif()
> endfor()
Looking through the CMake source, it doesn't look like CMAKE_COMPILER_IS_GNUFortran is used anywhere. I tested it, and it looks like it's empty too. Would it be possible to add CMAKE_COMPILER_IS_GNUC and CMAKE_COMPILER_IS_GNUFortran so that they actually work? I think this would be more consistent than the current setup.
These issues are coming up in the platform files I'm making for BlueGeneP. I think writing things like this would be easier if this were more consistent.
-Todd
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