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<title>Visual Studio Code – mulle-objc Development with IDEs</title>
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<h4>Nat!</h4>
<p>Senior Mull</p>
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<h2>mulle-objc Development with IDEs <div style="font-size:10px; display: inline-block;">1.1.0</div> <a href="/mulle-objc-ide/feed.xml"><img class="inline-img" src="/mulle-objc-ide/images/feed-icon-28x28.png"></a></h2>
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<h6>© 2022 by Nat!, Mulle kybernetiK. All rights reserved.</h6>
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<h2>mulle-objc Development with IDEs <div style="font-size:10px; display: inline-block;">1.1.0</div> <a href="/mulle-objc-ide/feed.xml"><img class="inline-img" src="/mulle-objc-ide/images/feed-icon-28x28.png"></a></h2>
</div>
<h6>© 2022 by Nat!, Mulle kybernetiK. All rights reserved.</h6>
<p>
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<div id="main" role="main">
<article>
<h1>Visual Studio Code</h1>
<div>
<p><a href="//code.visualstudio.com/Download">Visual Studio Code</a> and it’s
<a href="https://itsfoss.com/vscodium/">FOSS</a> sibling
<a href="https://github.com/VSCodium/vscodium/releases">VSCodium</a> are primarily
Web IDEs that can also be used to develop C projects.</p>
<p>To get VSCode cooking though, you need to pep it up with extensions. Here is a
list of some extensions, that are useful for mulle-objc development:</p>
<table>
<thead>
<tr>
<th>Package</th>
<th>Comment</th>
</tr>
</thead>
<tbody>
<tr>
<td>C/C++ (ms-vscode)</td>
<td>Not easily <a href="https://github.com/VSCodium/vscodium/issues/493">available</a> on VSCodium</td>
</tr>
<tr>
<td>CMake (twxs)</td>
<td> </td>
</tr>
<tr>
<td>Markdown Preview Github Styling (bierner)</td>
<td> </td>
</tr>
<tr>
<td>Native Debug (webfreak)</td>
<td> </td>
</tr>
</tbody>
</table>
<p>Click on the “Extension” icon on the left and search for extensions:</p>
<p><img src="images/vscode-extension.png" alt="" /></p>
<h3 id="create-a-mulle-objc-project">Create a mulle-objc project</h3>
<blockquote>
<p>If you haven’t installed mulle-sde go back to the
<a href="intro.html">Intro</a> and follow the
instructions there.</p>
</blockquote>
<p>You need a terminal to create a <em>mulle-objc</em> project. Maybe the easiest
way is to clone an existing mulle-objc project and modify it like so:</p>
<div class="language-sh highlighter-rouge"><div class="highlight"><pre class="highlight"><code>git clone https://github.com/mulle-cc/mulle-objc-vscode.git my-project
<span class="nb">cd </span>my-project
mulle-sde upgrade
mulle-sde project rename my-project
</code></pre></div></div>
<p><a href="//github.com/mulle-sde/mulle-sde-developer">mulle-sde-developer</a> provides the
<em>vscode-clang</em> extension. This extension ensures, that VSCode ignores
files that are non-editable. The extension also provides a couple of
build targets for interfacing with <em>mulle-sde</em> and some debugger support
for the “Native Debug” extension.</p>
<p>When you create a new project from scratch, add the <em>vscode.clang</em>
extension:</p>
<div class="language-sh highlighter-rouge"><div class="highlight"><pre class="highlight"><code>mulle-sde init <span class="nt">-d</span> my-project <span class="nt">-m</span> foundation/objc-developer executable
<span class="nb">cd </span>my-project
mulle-sde extension add vscode-clang
</code></pre></div></div>
<p>Without the vscode extension, there won’t be any
<code class="language-plaintext highlighter-rouge">.vscode</code> file initially in your project.</p>
<h3 id="open-the-project">Open the project</h3>
<p>From the console, if you have the <code class="language-plaintext highlighter-rouge">vscode</code> command in your <code class="language-plaintext highlighter-rouge">PATH</code>, you can
type <code class="language-plaintext highlighter-rouge">vscode my-project</code> and the project should open.
Otherwise open the project from within VSCode with <em>“File /Open Folder…“</em>.</p>
<p>And there should be your project:</p>
<p><img src="images/vscode-project.png" alt="Project" /></p>
<p>But… there may be errors. There are various paths in the <code class="language-plaintext highlighter-rouge">.vscode</code>
folder that may need fixing. Edit the file <code class="language-plaintext highlighter-rouge">.vscode/c_cpp_properties.json</code>:</p>
<div class="language-json highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="p">{</span><span class="w">
</span><span class="nl">"version"</span><span class="p">:</span><span class="w"> </span><span class="mi">4</span><span class="p">,</span><span class="w">
</span><span class="nl">"configurations"</span><span class="p">:</span><span class="w"> </span><span class="p">[</span><span class="w">
</span><span class="p">{</span><span class="w">
</span><span class="nl">"name"</span><span class="p">:</span><span class="w"> </span><span class="s2">"Linux"</span><span class="p">,</span><span class="w">
</span><span class="nl">"includePath"</span><span class="p">:</span><span class="w"> </span><span class="p">[</span><span class="w">
</span><span class="s2">"${workspaceFolder}/src/**"</span><span class="p">,</span><span class="w">
</span><span class="s2">"${workspaceFolder}/dependency/include/**"</span><span class="p">,</span><span class="w">
</span><span class="s2">"${workspaceFolder}/addiction/include/**"</span><span class="w">
</span><span class="p">],</span><span class="w">
</span><span class="nl">"defines"</span><span class="p">:</span><span class="w"> </span><span class="p">[],</span><span class="w">
</span><span class="nl">"compilerPath"</span><span class="p">:</span><span class="w"> </span><span class="s2">"mulle-clang"</span><span class="p">,</span><span class="w">
</span><span class="nl">"cStandard"</span><span class="p">:</span><span class="w"> </span><span class="s2">"c11"</span><span class="p">,</span><span class="w">
</span><span class="nl">"intelliSenseMode"</span><span class="p">:</span><span class="w"> </span><span class="s2">"clang-x64"</span><span class="p">,</span><span class="w">
</span><span class="nl">"compileCommands"</span><span class="p">:</span><span class="w"> </span><span class="s2">"${workspaceFolder}/kitchen/Debug/compile_commands.json"</span><span class="w">
</span><span class="p">},</span><span class="w">
</span><span class="p">{</span><span class="w">
</span><span class="nl">"name"</span><span class="p">:</span><span class="w"> </span><span class="s2">"Mac"</span><span class="p">,</span><span class="w">
</span><span class="nl">"includePath"</span><span class="p">:</span><span class="w"> </span><span class="p">[</span><span class="w">
</span><span class="s2">"${workspaceFolder}/src/**"</span><span class="p">,</span><span class="w">
</span><span class="s2">"${workspaceFolder}/dependency/include/**"</span><span class="p">,</span><span class="w">
</span><span class="s2">"${workspaceFolder}/addiction/include/**"</span><span class="w">
</span><span class="p">],</span><span class="w">
</span><span class="nl">"defines"</span><span class="p">:</span><span class="w"> </span><span class="p">[],</span><span class="w">
</span><span class="nl">"compilerPath"</span><span class="p">:</span><span class="w"> </span><span class="s2">"mulle-clang"</span><span class="p">,</span><span class="w">
</span><span class="nl">"cStandard"</span><span class="p">:</span><span class="w"> </span><span class="s2">"c11"</span><span class="p">,</span><span class="w">
</span><span class="nl">"intelliSenseMode"</span><span class="p">:</span><span class="w"> </span><span class="s2">"clang-x64"</span><span class="p">,</span><span class="w">
</span><span class="nl">"compileCommands"</span><span class="p">:</span><span class="w"> </span><span class="s2">"${workspaceFolder}/kitchen/Debug/compile_commands.json"</span><span class="w">
</span><span class="p">},</span><span class="w">
</span><span class="p">{</span><span class="w">
</span><span class="nl">"name"</span><span class="p">:</span><span class="w"> </span><span class="s2">"Win32"</span><span class="p">,</span><span class="w">
</span><span class="nl">"includePath"</span><span class="p">:</span><span class="w"> </span><span class="p">[</span><span class="w">
</span><span class="s2">"${workspaceFolder}/src/**"</span><span class="p">,</span><span class="w">
</span><span class="s2">"${workspaceFolder}/dependency/include/**"</span><span class="p">,</span><span class="w">
</span><span class="s2">"${workspaceFolder}/addiction/include/**"</span><span class="w">
</span><span class="p">],</span><span class="w">
</span><span class="nl">"defines"</span><span class="p">:</span><span class="w"> </span><span class="p">[],</span><span class="w">
</span><span class="nl">"compilerPath"</span><span class="p">:</span><span class="w"> </span><span class="s2">"mulle-clang-cl.exe"</span><span class="p">,</span><span class="w">
</span><span class="nl">"cStandard"</span><span class="p">:</span><span class="w"> </span><span class="s2">"c11"</span><span class="p">,</span><span class="w">
</span><span class="nl">"intelliSenseMode"</span><span class="p">:</span><span class="w"> </span><span class="s2">"clang-x64"</span><span class="p">,</span><span class="w">
</span><span class="nl">"compileCommands"</span><span class="p">:</span><span class="w"> </span><span class="s2">"${workspaceFolder}/kitchen/Debug/compile_commands.json"</span><span class="w">
</span><span class="p">}</span><span class="w">
</span><span class="p">]</span><span class="w">
</span><span class="p">}</span><span class="w">
</span></code></pre></div></div>
<p>For your platform, adjust to the proper compiler path. Type <code class="language-plaintext highlighter-rouge">which mulle-clang</code>
and it should give you the proper path. (Otherwise look in
<code class="language-plaintext highlighter-rouge">/opt/mulle-clang-project/<version>/bin</code> or <code class="language-plaintext highlighter-rouge">/usr/local/bin</code>).</p>
<h3 id="run-tasks">Run Tasks</h3>
<p>To see the list of available tasks choose <em>“Terminal / Run Task…”</em> and the list
of commands will look something like this:</p>
<p><img src="images/vscode-tasks.png" alt="Tasks" /></p>
<table>
<thead>
<tr>
<th>Task</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td>Reflect</td>
<td>When you add or remove files from the project, you need to run “Reflect” so changes will be picked up. You do not need to edit <code class="language-plaintext highlighter-rouge">CMakeLists.txt</code></td>
</tr>
<tr>
<td>Debug</td>
<td>The default build-style for crafting is Debug</td>
</tr>
<tr>
<td>Release</td>
<td>Use Release build-style for crafting</td>
</tr>
<tr>
<td> </td>
<td> </td>
</tr>
<tr>
<td>Clean</td>
<td>Clean your projects build products and intermediate files</td>
</tr>
<tr>
<td>Clean Tidy</td>
<td>Also clean downloaded dependencies. They will need to be refetched.</td>
</tr>
<tr>
<td>Clean Download Caches</td>
<td>Also clean mirrored git repositories and cached tar archives.</td>
</tr>
<tr>
<td> </td>
<td> </td>
</tr>
<tr>
<td>Upgrade</td>
<td>After installing a new mulle-sde version, upgrade the project. Cleans caches…</td>
</tr>
</tbody>
</table>
<h2 id="development-cycle">Development Cycle</h2>
<h3 id="craft">Craft</h3>
<p><em>You need the package <strong>C/C++</strong> for this.</em></p>
<p>Build your project using the “Craft Debug” task (<em>“Terminal / Run Build Task…“</em>).
This can take a minute or more, depending on your machines capabilities. On
the initial craft, dependencies will be fetched and built.</p>
<p><img src="images/vscode-craft.png" alt="Craft" /></p>
<p>In the end you will see the line:</p>
<div class="language-plaintext highlighter-rouge"><div class="highlight"><pre class="highlight"><code>Run your executable:
kitchen/Debug/my-project
</code></pre></div></div>
<p>The executable location may differ with your local setup. So you might see a
different path there. You can now run the executable directly in VSCode.
Use <em>Terminal / New Termial</em> to open a terminal:</p>
<p><img src="images/vscode-run.png" alt="Terminals" /></p>
<h3 id="debug">Debug</h3>
<p>Navigate to your sources <code class="language-plaintext highlighter-rouge">src/main.m</code> and place a breakpoint in the
<code class="language-plaintext highlighter-rouge">main</code> by clicking to the left of the linenumber:</p>
<p><img src="images/vscode-breakpoint.png" alt="Breakpoint" /></p>
<p>You may have to edit the <code class="language-plaintext highlighter-rouge">.vscode/launch.json</code> file at this point,
to set the correct executable path for the debugger.</p>
<blockquote>
<p><strong>Webfreak or C/C++ (ms-vscode) ?</strong></p>
<p>There are two extensions to enable debugging in Visual Studio Code.
One is <code class="language-plaintext highlighter-rouge">webfreak.debug</code> (<strong>Native Debug by Webfreak</strong>) the other
is <code class="language-plaintext highlighter-rouge">ms-vscode.cpptool</code> (<strong>C/C++ from Microsoft</strong>).
In terms of this guide, the main differentiator in the <code class="language-plaintext highlighter-rouge">launch.json</code>
between both extensions is the <code class="language-plaintext highlighter-rouge">type</code>. It’s <code class="language-plaintext highlighter-rouge">"cppdbg"</code> for Microsoft and
“gdb” for Webfreak.</p>
</blockquote>
<h4 id="ms-vscodecpptool">ms-vscode.cpptool</h4>
<p>Edit the <code class="language-plaintext highlighter-rouge">miDebuggerPath</code> path to the mulle-gdb path (<code class="language-plaintext highlighter-rouge">which mulle-gdb</code>) on
your platform:</p>
<div class="language-json highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="p">{</span><span class="w">
</span><span class="nl">"version"</span><span class="p">:</span><span class="w"> </span><span class="s2">"0.2.0"</span><span class="p">,</span><span class="w">
</span><span class="nl">"configurations"</span><span class="p">:</span><span class="w"> </span><span class="p">[</span><span class="w">
</span><span class="p">{</span><span class="w">
</span><span class="nl">"_comment"</span><span class="p">:</span><span class="w"> </span><span class="s2">"All? It's often convenient in library projects too"</span><span class="p">,</span><span class="w">
</span><span class="nl">"name"</span><span class="p">:</span><span class="w"> </span><span class="s2">"Debug my-project"</span><span class="p">,</span><span class="w">
</span><span class="nl">"type"</span><span class="p">:</span><span class="w"> </span><span class="s2">"cppdbg"</span><span class="p">,</span><span class="w">
</span><span class="nl">"request"</span><span class="p">:</span><span class="w"> </span><span class="s2">"launch"</span><span class="p">,</span><span class="w">
</span><span class="nl">"stopAtEntry"</span><span class="p">:</span><span class="w"> </span><span class="kc">true</span><span class="p">,</span><span class="w">
</span><span class="nl">"program"</span><span class="p">:</span><span class="w"> </span><span class="s2">"${workspaceFolder}/kitchen/Debug/my-project"</span><span class="p">,</span><span class="w">
</span><span class="nl">"args"</span><span class="p">:</span><span class="w"> </span><span class="p">[],</span><span class="w">
</span><span class="nl">"environment"</span><span class="p">:</span><span class="w"> </span><span class="p">[],</span><span class="w">
</span><span class="nl">"cwd"</span><span class="p">:</span><span class="w"> </span><span class="s2">"${workspaceFolder}"</span><span class="p">,</span><span class="w">
</span><span class="nl">"additionalSOLibSearchPath"</span><span class="p">:</span><span class="w"> </span><span class="s2">"${workspaceFolder}/dependency/Debug/lib:${workspaceFolder}/dependency/lib"</span><span class="p">,</span><span class="w">
</span><span class="nl">"windows"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w">
</span><span class="nl">"MIMode"</span><span class="p">:</span><span class="w"> </span><span class="s2">"gdb"</span><span class="p">,</span><span class="w">
</span><span class="nl">"miDebuggerPath"</span><span class="p">:</span><span class="w"> </span><span class="s2">"C:</span><span class="se">\\</span><span class="s2">mingw64</span><span class="se">\\</span><span class="s2">bin</span><span class="se">\\</span><span class="s2">mulle-gdb.exe"</span><span class="p">,</span><span class="w">
</span><span class="nl">"program"</span><span class="p">:</span><span class="w"> </span><span class="s2">"${workspaceFolder}/kitchen/Debug/my-project.exe"</span><span class="w">
</span><span class="p">},</span><span class="w">
</span><span class="nl">"osx"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w">
</span><span class="nl">"MIMode"</span><span class="p">:</span><span class="w"> </span><span class="s2">"lldb"</span><span class="p">,</span><span class="w">
</span><span class="nl">"miDebuggerPath"</span><span class="p">:</span><span class="w"> </span><span class="s2">"/usr/local/bin/lldb-mi"</span><span class="w">
</span><span class="p">},</span><span class="w">
</span><span class="nl">"linux"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w">
</span><span class="nl">"MIMode"</span><span class="p">:</span><span class="w"> </span><span class="s2">"gdb"</span><span class="p">,</span><span class="w">
</span><span class="nl">"miDebuggerPath"</span><span class="p">:</span><span class="w"> </span><span class="s2">"mulle-gdb"</span><span class="w">
</span><span class="p">},</span><span class="w">
</span><span class="nl">"preLaunchTask"</span><span class="p">:</span><span class="w"> </span><span class="s2">"Debug"</span><span class="w">
</span><span class="p">}</span><span class="w">
</span><span class="p">]</span><span class="w">
</span><span class="p">}</span><span class="w">
</span></code></pre></div></div>
<h4 id="webfreakdebug">webfreak.debug</h4>
<p>Edit the <code class="language-plaintext highlighter-rouge">gdbpath</code> path to the mulle-gdb path (<code class="language-plaintext highlighter-rouge">which mulle-gdb</code>) on
your platform:</p>
<div class="language-json highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="w">
</span><span class="p">{</span><span class="w">
</span><span class="nl">"version"</span><span class="p">:</span><span class="w"> </span><span class="s2">"0.2.0"</span><span class="p">,</span><span class="w">
</span><span class="nl">"configurations"</span><span class="p">:</span><span class="w"> </span><span class="p">[</span><span class="w">
</span><span class="p">{</span><span class="w">
</span><span class="nl">"type"</span><span class="p">:</span><span class="w"> </span><span class="s2">"gdb"</span><span class="p">,</span><span class="w">
</span><span class="nl">"request"</span><span class="p">:</span><span class="w"> </span><span class="s2">"launch"</span><span class="p">,</span><span class="w">
</span><span class="nl">"gdbpath"</span><span class="p">:</span><span class="w"> </span><span class="s2">"/usr/local/bin/mulle-gdb"</span><span class="p">,</span><span class="w">
</span><span class="nl">"name"</span><span class="p">:</span><span class="w"> </span><span class="s2">"Debug my-project"</span><span class="p">,</span><span class="w">
</span><span class="nl">"target"</span><span class="p">:</span><span class="w"> </span><span class="s2">"${workspaceRoot}/kitchen/Debug/my-project.exe"</span><span class="p">,</span><span class="w">
</span><span class="nl">"cwd"</span><span class="p">:</span><span class="w"> </span><span class="s2">"${workspaceRoot}"</span><span class="p">,</span><span class="w">
</span><span class="nl">"valuesFormatting"</span><span class="p">:</span><span class="w"> </span><span class="s2">"parseText"</span><span class="w">
</span><span class="p">}</span><span class="w">
</span><span class="p">]</span><span class="w">
</span><span class="p">}</span><span class="w">
</span></code></pre></div></div>
<p>Now hit [F5] to run your program in the debugger. It should immediately stop
on the breakpoint:</p>
<p><img src="images/vscode-debug.png" alt="Breakpoint" /></p>
<p>From here on use either the <a href="//marketplace.visualstudio.com/items?itemName=webfreak.debug">Native Debug documentation</a>
or <a href="https://code.visualstudio.com/docs/cpp/cpp-debug">Debug C in Visual Studio Code</a> for more help.</p>
<h3 id="edit">Edit</h3>
<p>We create a new class in “VSCode” to demonstrate the
“Edit->Reflect->Craft(->Debug)” cycle that is the key development cycle of
mulle-sde projects.
First up create two new files in <code class="language-plaintext highlighter-rouge">src</code> namely <code class="language-plaintext highlighter-rouge">src/Foo.h</code> and <code class="language-plaintext highlighter-rouge">src/Foo.m</code>.
(Right click on the <code class="language-plaintext highlighter-rouge">src</code> folder and “New File”).</p>
<p>Let’s put an error into the file for demonstration purposes:</p>
<pre><code class="language-Foo.h">#import "import.h"
@interphase Foo : NSObject // misspelled @interface
- (void) hello;
@end
</code></pre>
<pre><code class="language-Foo.m">#import "Foo.h"
#import "import-private.h"
@implementation Foo
- (void) hello
{
mulle_printf( "Hello\n");
}
@end
</code></pre>
<blockquote>
<h4 id="tip">Tip</h4>
<p>If you like a class with template code, you can use <code class="language-plaintext highlighter-rouge">mulle-sde add src/Foo.m</code>
instead. This will also make the next “Reflect” step superflous.</p>
</blockquote>
<h3 id="reflect">Reflect</h3>
<p>Now run the “Reflect” task (<em>“Terminal / Run Task… / Reflect”</em>).
The reflection places your source files into the <em>cmake</em> build system and adds
them to your list of C headers. You can observe the change in
<code class="language-plaintext highlighter-rouge">cmake/reflect/_Sources</code> and <code class="language-plaintext highlighter-rouge">cmake/reflect/_Headers</code> as well as in
<code class="language-plaintext highlighter-rouge">src/reflect/_my-project.export.h</code></p>
<p>You only need to “Reflect” if you have added or deleted files from the project.</p>
<h3 id="craft-1">Craft</h3>
<p>Now with the syntax error in place, the next craft will immediately preempt
with an error:</p>
<p><img src="images/vscode-error.png" alt="Error" /></p>
<p>If Visual Studio can’t find the source file, you may have to tweak the
“problemmatcher” in <code class="language-plaintext highlighter-rouge">.vscode/tasks.json</code>:</p>
<div class="language-json highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="p">{</span><span class="w">
</span><span class="nl">"version"</span><span class="p">:</span><span class="w"> </span><span class="s2">"2.0.0"</span><span class="p">,</span><span class="w">
</span><span class="nl">"tasks"</span><span class="p">:</span><span class="w"> </span><span class="p">[</span><span class="w">
</span><span class="p">{</span><span class="w">
</span><span class="nl">"label"</span><span class="p">:</span><span class="w"> </span><span class="s2">"Craft"</span><span class="p">,</span><span class="w">
</span><span class="nl">"type"</span><span class="p">:</span><span class="w"> </span><span class="s2">"shell"</span><span class="p">,</span><span class="w">
</span><span class="nl">"command"</span><span class="p">:</span><span class="w"> </span><span class="s2">"mulle-sde"</span><span class="p">,</span><span class="w">
</span><span class="nl">"args"</span><span class="p">:</span><span class="w"> </span><span class="p">[</span><span class="w">
</span><span class="s2">"craft"</span><span class="w">
</span><span class="p">],</span><span class="w">
</span><span class="nl">"problemMatcher"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w">
</span><span class="nl">"base"</span><span class="p">:</span><span class="w"> </span><span class="s2">"$gcc"</span><span class="p">,</span><span class="w">
</span><span class="nl">"fileLocation"</span><span class="p">:</span><span class="w"> </span><span class="p">[</span><span class="w">
</span><span class="s2">"relative"</span><span class="p">,</span><span class="w">
</span><span class="s2">"${workspaceFolder}/kitchen/Debug"</span><span class="w">
</span><span class="p">]</span><span class="w">
</span><span class="p">},</span><span class="w">
</span><span class="err">...</span><span class="w">
</span></code></pre></div></div>
<p>change the <code class="language-plaintext highlighter-rouge">"relative"</code> in “tasks/problemMatcher/fileLocation” to
<code class="language-plaintext highlighter-rouge">"absolute"</code>. Do this for the tasks “Craft”, “Debug”, “Release”.</p>
<p>That wraps it up for VSCode here.</p>
</div>
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