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<h1>Compiling AutoDock Vina on iOS</h1>
<p>Why? Because I can.</p>
<h2>Installing makedepend</h2>
<p><code>makedepend</code> is a Unix tool used to generate dependencies of C source files. Most modern programs do not use this anymore, but then again AutoDock Vina's source code hasn't been changed since 2011. The first hurdle came when I saw that there was no makedepend command, neither was there any package on any development repository for iOS. So, I tracked down the original source code for <code>makedepend</code> (https://github.com/DerellLicht/makedepend). According to the repository this is actually the source code for the makedepend utility that came with some XWindows distribution back around Y2K. I am pretty sure there is a problem with my current compiler configuration because I had to manually edit the <code>Makefile</code> to provide the path to the iOS SDKs using the <code>-isysroot</code> flag.</p>
<h2>Editing the Makefile</h2>
<p>Original Makefile ( I used the provided mac Makefile base )</p>
<pre><code>BASE=/usr/local
BOOST_VERSION=1_41
BOOST_INCLUDE = $(BASE)/include
C_PLATFORM=-arch i386 -arch ppc -isysroot /Developer/SDKs/MacOSX10.5.sdk -mmacosx-version-min=10.4
GPP=/usr/bin/g++
C_OPTIONS= -O3 -DNDEBUG
BOOST_LIB_VERSION=
include ../../makefile_common
</code></pre>
<p>I installed Boost 1.68.0-1 from Sam Bingner's repository. ( Otherwise I would have had to compile boost too 😫 )</p>
<p>Edited Makefile</p>
<pre><code>BASE=/usr
BOOST_VERSION=1_68
BOOST_INCLUDE = $(BASE)/include
C_PLATFORM=-arch arm64 -isysroot /var/sdks/Latest.sdk
GPP=/usr/bin/g++
C_OPTIONS= -O3 -DNDEBUG
BOOST_LIB_VERSION=
include ../../makefile_common
</code></pre>
<h2>Updating the Source Code</h2>
<p>Of course since Boost 1.41 many things have been added and deprecated, that is why I had to edit the source code to make it work with version 1.68</p>
<h3>Error 1 - No Matching Constructor</h3>
<pre><code>../../../src/main/main.cpp:50:9: error: no matching constructor for initialization of 'path' (aka 'boost::filesystem::path')
return path(str, boost::filesystem::native);
</code></pre>
<p>This was an easy fix, I just commented this and added a return statement to return the path</p>
<pre><code>return path(str)
</code></pre>
<h3>Error 2 - No Member Named 'native<em>file</em>string'</h3>
<pre><code>../../../src/main/main.cpp:665:57: error: no member named 'native_file_string' in 'boost::filesystem::path'
std::cerr << "\n\nError: could not open \"" << e.name.native_file_string() << "\" for " << (e.in ? "reading" : "writing") << ".\n";
~~~~~~ ^
../../../src/main/main.cpp:677:80: error: no member named 'native_file_string' in 'boost::filesystem::path'
std::cerr << "\n\nParse error on line " << e.line << " in file \"" << e.file.native_file_string() << "\": " << e.reason << '\n';
~~~~~~ ^
2 errors generated.
</code></pre>
<p>Turns out <code>native_file_string</code> was deprecated in Boost 1.57 and replaced with just <code>string</code></p>
<h3>Error 3 - Library Not Found</h3>
<p>This one still boggles me because there was no reason for it to not work, as a workaround I downloaded the DEB, extracted it and used that path for compiling.</p>
<h3>Error 4 - No Member Named 'native<em>file</em>string' Again.</h3>
<p>But, this time in another file and I quickly fixed it</p>
<h2>Moment of Truth</h2>
<p>Obviously it was working on my iPad, but would it work on another device? I transferred the compiled binary and </p>
<p><img src="/assets/posts/autodock-vina/s1.png" alt=""AutoDock Vina running on my iPhone"" /></p>
<p>The package is available on my repository and only depends on boost. ( Both, Vina and Vina-Split are part of the package)</p>
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