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<p class="MsoNormal"><font size="2" face="Calibri"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;mso-fareast-language:EN-US">I am using a toolchain file! The CC and CXX environment variables are set by CMake (I assume, because
I haven’t touched them).<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Calibri"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;mso-fareast-language:EN-US"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Calibri"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;mso-fareast-language:EN-US">I’ll disect the link to see what I’ve missed.<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Calibri"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;mso-fareast-language:EN-US"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Calibri"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;mso-fareast-language:EN-US">Regards<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Calibri"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;mso-fareast-language:EN-US">/R<o:p></o:p></span></font></p>
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<p class="MsoNormal"><b><font size="2" face="Calibri"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;font-weight:bold">From:</span></font></b><font size="2" face="Calibri"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">
Craig Scott [mailto:craig.scott@crascit.com] <br>
<b><span style="font-weight:bold">Sent:</span></b> den 10 oktober 2016 13:56<br>
<b><span style="font-weight:bold">To:</span></b> Robert Bielik <Robert.Bielik@dirac.com><br>
<b><span style="font-weight:bold">Cc:</span></b> Cmake@cmake.org<br>
<b><span style="font-weight:bold">Subject:</span></b> Re: [CMake] Crosscompilation woes<o:p></o:p></span></font></p>
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<p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt">Don't use environment variables to set the ARM compilers in your situation, use a toolchain file to specify them instead. Your CMake experience will generally be smoother
if you specify cross-compile details via toolchain files. If you are following the method in the stackoverflow link I mentioned last time, the host part of the build will then pick up the host compilers and the ARM part of the build will use the compilers
from the toolchain file.<o:p></o:p></span></font></p>
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<p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt">On Mon, Oct 10, 2016 at 10:50 PM, Robert Bielik <<a href="mailto:Robert.Bielik@dirac.com" target="_blank">Robert.Bielik@dirac.com</a>> wrote:<o:p></o:p></span></font></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><font size="2" face="Calibri"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">I’m trying to do this, but since I setup a cross compiling env. by setting
C&C++ compiler, these settings get used when I run execute_process to setup the host build !! Thus I get the ARM version of the build tools anyway! :(</span></font><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><font size="2" face="Calibri"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif"> </span></font><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><font size="2" face="Calibri"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">It seems that when execute_process is executed, the CC and CXX environment
variables are set, which makes cmake use those when generating the makefiles.</span></font><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><font size="2" face="Calibri"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif"> </span></font><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><font size="2" face="Calibri"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">Ideas are most welcome!</span></font><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><font size="2" face="Calibri"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif"> </span></font><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><font size="2" face="Calibri"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">Regards</span></font><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><font size="2" face="Calibri"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">/R</span></font><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><font size="2" face="Calibri"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif"> </span></font><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b><font size="2" face="Calibri"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;font-weight:bold">From:</span></font></b><font size="2" face="Calibri"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">
Craig Scott [mailto:<a href="mailto:craig.scott@crascit.com" target="_blank">craig.scott@crascit.com</a>]
<br>
<b><span style="font-weight:bold">Sent:</span></b> den 10 oktober 2016 10:47<br>
<b><span style="font-weight:bold">To:</span></b> Robert Bielik <<a href="mailto:Robert.Bielik@dirac.com" target="_blank">Robert.Bielik@dirac.com</a>><br>
<b><span style="font-weight:bold">Cc:</span></b> <a href="mailto:Cmake@cmake.org" target="_blank">
Cmake@cmake.org</a><br>
<b><span style="font-weight:bold">Subject:</span></b> Re: [CMake] Crosscompilation woes</span></font><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><font size="3" face="Times New Roman"><span lang="EN-US" style="font-size:12.0pt">Here's one possible solution (not perfect, but has been working in production for us for a while
now for a similar scenario to what you describe):</span><o:p></o:p></font></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><font size="3" face="Times New Roman"><span lang="EN-US" style="font-size:12.0pt"> </span><o:p></o:p></font></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"><a href="http://stackoverflow.com/q/36084785/1938798" target="_blank"><span lang="EN-US">http://stackoverflow.com/q/36084785/1938798</span></a><o:p></o:p></span></font></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><font size="3" face="Times New Roman"><span lang="EN-US" style="font-size:12.0pt"> </span><o:p></o:p></font></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><font size="3" face="Times New Roman"><span lang="EN-US" style="font-size:12.0pt">An alternative is a superbuild arrangement which would require a top level project to drive two
sub-builds brought in via </span><a href="https://cmake.org/cmake/help/latest/module/ExternalProject.html" target="_blank"><span lang="EN-US">ExternalProject</span></a></font><span lang="EN-US">, one for the host and the other for arm. This is both better
and worse, depending on your point of view, so you may need to do some research/experimenting to see which is a better fit for your situation.</span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><font size="3" face="Times New Roman"><span lang="EN-US" style="font-size:12.0pt"> </span><o:p></o:p></font></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><font size="3" face="Times New Roman"><span lang="EN-US" style="font-size:12.0pt"> </span><o:p></o:p></font></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><font size="3" face="Times New Roman"><span lang="EN-US" style="font-size:12.0pt">On Mon, Oct 10, 2016 at 7:29 PM, Robert Bielik <</span><a href="mailto:Robert.Bielik@dirac.com" target="_blank"><span lang="EN-US">Robert.Bielik@dirac.com</span></a></font><span lang="EN-US">>
wrote:</span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><font size="3" face="Times New Roman"><span lang="EN-US" style="font-size:12.0pt">Hi all,<br>
<br>
I am crosscompiling a project for arm (on linux i686), and use codegeneration tools within the project (together with add_custom_command). Of course, this will fail, since the tools are compiled for arm also and thus won't execute on my host system. So the
tools need to be compiled for i686 whilst the rest for arm. I'm sure this can be handled by CMake although haven't done it before so would appreciate pointers :)<br>
<br>
Regards<br>
/Robert<br>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><font size="3" face="Times New Roman"><span lang="EN-US" style="font-size:12.0pt"> </span><o:p></o:p></font></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><font size="3" face="Times New Roman"><span lang="EN-US" style="font-size:12.0pt">Craig Scott</span><o:p></o:p></font></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><font size="3" face="Times New Roman"><span lang="EN-US" style="font-size:12.0pt">Melbourne, Australia</span><o:p></o:p></font></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"><a href="https://crascit.com" target="_blank"><span lang="EN-US">https://crascit.com</span></a><o:p></o:p></span></font></p>
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<p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt">Craig Scott<o:p></o:p></span></font></p>
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<p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt">Melbourne, Australia<o:p></o:p></span></font></p>
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<p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"><a href="https://crascit.com" target="_blank">https://crascit.com</a><o:p></o:p></span></font></p>
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