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Diffstat (limited to 'development/gcc.html')
| -rw-r--r-- | development/gcc.html | 33 |
1 files changed, 26 insertions, 7 deletions
diff --git a/development/gcc.html b/development/gcc.html index 2de7655..5b0fcc0 100644 --- a/development/gcc.html +++ b/development/gcc.html @@ -24,9 +24,9 @@ <link rel="stylesheet" href="../fonts/fonts.css"> <!-- Highlight.js Stylesheets --> - <link rel="stylesheet" href="../highlight.css"> - <link rel="stylesheet" href="../tomorrow-night.css"> - <link rel="stylesheet" href="../ayu-highlight.css"> + <link rel="stylesheet" id="highlight-css" href="../highlight.css"> + <link rel="stylesheet" id="tomorrow-night-css" href="../tomorrow-night.css"> + <link rel="stylesheet" id="ayu-highlight-css" href="../ayu-highlight.css"> <!-- Custom theme stylesheets --> @@ -157,6 +157,16 @@ <main> <h1 id="gcc1"><a class="header" href="#gcc1">gcc(1)</a></h1> <h2 id="cli"><a class="header" href="#cli">CLI</a></h2> +<ul> +<li><code>-v</code> verbose, outputs exact compiler/linker invocations made by the gcc driver</li> +<li><code>-###</code> dry-run, outputting exact compiler/linker invocations</li> +<li><code>-print-multi-lib</code> print available multilib configurations</li> +<li><code>--help=<class></code> print description of cmdline options for given class, eg +<code>warnings</code>, <code>optimizers</code>, <code>target</code>, <code>c</code>, <code>c++</code></li> +<li><code>-Wl,<opt></code> additional option passed to the linker invocation (can +be specified multiple times)</li> +<li><code>-Wl,--trace</code> trace each file the linker touches</li> +</ul> <h3 id="preprocessing"><a class="header" href="#preprocessing">Preprocessing</a></h3> <p>While debugging can be helpful to just pre-process files.</p> <pre><code class="language-bash">gcc -E [-dM] ... @@ -164,10 +174,6 @@ <ul> <li><code>-E</code> run only preprocessor</li> <li><code>-dM</code> list only <code>#define</code> statements</li> -<li><code>-###</code> dry-run, outputting exact compiler/linker invocations</li> -<li><code>-print-multi-lib</code> print available multilib configurations</li> -<li><code>--help=<class></code> print description of cmdline options for given class, eg -<code>warnings</code>, <code>optimizers</code>, <code>target</code>, <code>c</code>, <code>c++</code></li> </ul> <h3 id="target-options"><a class="header" href="#target-options">Target options</a></h3> <pre><code class="language-bash"># List all target options with their description. @@ -185,6 +191,19 @@ gcc --help=optimizers # Prepend --help with `-Q` to print wheter options are enabled or disabled # instead showing their description. </code></pre> +<h3 id="sanitizer"><a class="header" href="#sanitizer">Sanitizer</a></h3> +<pre><code class="language-bash"># Enable address sanitizer, a memory error checker (out of bounds, use after free, ..). +gcc -fsanitize=address ... + +# Enable leak sanitizer, a memory leak detector. +gcc -fsanitize=leak + +# Enable undefined behavior sanitizer, detects various UBs (integer overflow, ..). +gcc -fsanitize=undefined ... + +# Enable thread sanitizer, a data race detector. +gcc -fsanitize=thread +</code></pre> <h2 id="builtins"><a class="header" href="#builtins"><a href="https://gcc.gnu.org/onlinedocs/gcc/Other-Builtins.html">Builtins</a></a></h2> <h3 id="__builtin_expectexpr-cond"><a class="header" href="#__builtin_expectexpr-cond"><code>__builtin_expect(expr, cond)</code></a></h3> <p>Give the compiler a hint which branch is hot, so it can lay out the code |