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<p class="MsoNormal">Greetings and Salutations All,<br>
<br>
I’m trying to add structure to the src folder since the amount of files I have residing in the src directory could be better organized. Note: These files are made using RcppArmadillo.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">E.g. <o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I’m looking to go from:<br>
<br>
src/<br>
|-> main.cpp<o:p></o:p></p>
<p class="MsoNormal"> |-> testA.cpp<o:p></o:p></p>
<p class="MsoNormal"> |-> testA.h<o:p></o:p></p>
<p class="MsoNormal"> |-> testB.cpp<o:p></o:p></p>
<p class="MsoNormal"> |-> testB.h<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">To a structure like:<o:p></o:p></p>
<p class="MsoNormal"><br>
src/<br>
|-> main.cpp<br>
|-> A<o:p></o:p></p>
<p class="MsoNormal"> |-> testA.cpp<o:p></o:p></p>
<p class="MsoNormal"> |-> testA.h<o:p></o:p></p>
<p class="MsoNormal"> |-> B<o:p></o:p></p>
<p class="MsoNormal"> |-> testB.cpp<o:p></o:p></p>
<p class="MsoNormal"> |-> testB.h<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Each file has a function:<o:p></o:p></p>
<p class="MsoNormal">main.cpp => testfunction(x)<o:p></o:p></p>
<p class="MsoNormal">testA.cpp => testfunctionA(x)<o:p></o:p></p>
<p class="MsoNormal">testB.cpp => testfunctionB(x)<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">To illustrate the issue, I have two repositories<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">SrcDir: <a href="https://github.com/coatless/header_cpp_subdir_code">
https://github.com/coatless/header_cpp_subdir_code</a><o:p></o:p></p>
<p class="MsoNormal">SubdirSrc: <a href="https://github.com/coatless/header_cpp_code">
https://github.com/coatless/header_cpp_code</a><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">If I compile without trying to change the folder structure, the package is made and is able to use without issue.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">However, when I attempt to change the folder structure, I was getting a compiler error that identifies with a linking issue:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal" style="word-break:break-all"><span style="font-size:10.0pt;font-family:"Courier New";color:black;border:none windowtext 1.0pt;padding:0in;background:#E1E2E5">main.o:main.cpp:(.text+0x650a): undefined reference to `testfunctionA(arma::Col<double>
const&)'</span><br>
<br>
I looked at CRANs documentation for a suggested fix and ended up trying to ensure a link by using the makevars file (see:
<a href="http://cran.r-project.org/doc/manuals/r-release/R-exts.html#Using-Makevars">
http://cran.r-project.org/doc/manuals/r-release/R-exts.html#Using-Makevars</a>)<span style="font-size:10.0pt;font-family:"Courier New";color:black;background:#E1E2E5"><o:p></o:p></span></p>
<p class="MsoNormal"><br>
I made the following changes:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">The Makevars file update seemed to work as the package then compiled.
<o:p></o:p></p>
<p class="MsoNormal">(Exact changes to Makevars.win: <a href="https://github.com/coatless/header_cpp_subdir_code/blob/master/src/Makevars.win">
https://github.com/coatless/header_cpp_subdir_code/blob/master/src/Makevars.win</a> )<o:p></o:p></p>
<p class="MsoNormal">
<o:p></o:p></p>
<p class="MsoNormal">Herein lies the issues:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo1"><![if !supportLists]><span style="mso-list:Ignore">1.<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]> Any files I’ve written in the subdirectories are no longer exported to RcppExport.cpp even though they have a // [[Rcpp::export]] tag preceding the function declaration.<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo1"><![if !supportLists]><span style="mso-list:Ignore">2.<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>When I try to call the function in main.cpp (testfunction(x)), I receive:<o:p></o:p></p>
<pre style="margin-left:.5in;word-break:break-all"><span class="gewyw5ybmdb"><span style="font-family:"Lucida Console";color:blue;background:#E1E2E5">testfunction(2^(1:5))<o:p></o:p></span></span></pre>
<pre style="margin-left:.5in;word-break:break-all"><span class="gewyw5ybaeb"><span style="font-family:"Lucida Console";color:#C5060B;background:#E1E2E5">Error in .Call("SubdirSrc_testfunction", PACKAGE = "SubdirSrc", x) : <o:p></o:p></span></span></pre>
<pre style="margin-left:.5in;word-break:break-all"><span class="gewyw5ybaeb"><span style="font-family:"Lucida Console";color:#C5060B;background:#E1E2E5"> "SubdirSrc_testfunction" not available for .Call() for package "SubdirSrc"</span></span><span style="font-family:"Lucida Console";color:black;background:#E1E2E5"><o:p></o:p></span></pre>
<p class="MsoListParagraph"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Any suggestions would be appreciated.<br>
<br>
Sincerely,<o:p></o:p></p>
<p class="MsoNormal"><br>
JJB<o:p></o:p></p>
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