[CMake] More than one C Compiler in a Project

[David Cole]

You might consider using the new ExternalProject module and the
ExternalProject_Add function to build one as a separate stand-alone project.

See this article about using ExternalProject in the latest "The Source"
newsletter on pp. 14-17:
http://kitware.com/products/archive/kitware_quarterly1009.pdf

HTH,
David


On Tue, Dec 8, 2009 at 12:43 PM, Alexander Neundorf <a.neundorf-work at gmx.net
> wrote:

> On Tuesday 08 December 2009, Rüdiger Ranft wrote:
> > Hi all,
> >
> > I need to use two different C compilers in a project, because this
> > project consists of both PC software and micro controller firmware. Is
> > there a way to use cmake to generate Makefiles which call different
> > compilers, (or to hard-code a second one, since the PC software can be
> > developed with diferent compilers, but the MC software is fixed to one
> > special vendor-provided)?
>
> In general this is not supported (since all test results in CMakeCache.txt
> etc. are invalid for the other compiler).
> But if you know what you are doing, it should be possible to just set the
> COMPILE-variables in the subdirectory where the sources for your
> microcontroller are manually to how they should look like for this
> compiler.
> try_compile() tests etc. will not work properly there.
> This is basically what is done in cmake/Modules/UseEcos.cmake, but this is
> already a few years old and today I consider this actually a hack.
>
> Alex
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