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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>Cross-compiling the GLib package: GLib Reference Manual</title> <meta name="generator" content="DocBook XSL Stylesheets V1.79.1"> <link rel="home" href="index.html" title="GLib Reference Manual"> <link rel="up" href="glib.html" title="GLib Overview"> <link rel="prev" href="glib-building.html" title="Compiling the GLib package"> <link rel="next" href="glib-programming.html" title="Writing GLib Applications"> <meta name="generator" content="GTK-Doc V1.32 (XML mode)"> <link rel="stylesheet" href="style.css" type="text/css"> </head> <body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"> <table class="navigation" id="top" width="100%" summary="Navigation header" cellpadding="2" cellspacing="5"><tr valign="middle"> <td width="100%" align="left" class="shortcuts"></td> <td><a accesskey="h" href="index.html"><img src="home.png" width="16" height="16" border="0" alt="Home"></a></td> <td><a accesskey="u" href="glib.html"><img src="up.png" width="16" height="16" border="0" alt="Up"></a></td> <td><a accesskey="p" href="glib-building.html"><img src="left.png" width="16" height="16" border="0" alt="Prev"></a></td> <td><a accesskey="n" href="glib-programming.html"><img src="right.png" width="16" height="16" border="0" alt="Next"></a></td> </tr></table> <div class="refentry"> <a name="glib-cross-compiling"></a><div class="titlepage"></div> <div class="refnamediv"><table width="100%"><tr> <td valign="top"> <h2><span class="refentrytitle">Cross-compiling the GLib package</span></h2> <p>Cross-compiling the GLib Package — How to cross-compile GLib </p> </td> <td class="gallery_image" valign="top" align="right"></td> </tr></table></div> <div class="refsect1"> <a name="cross"></a><h2>Building the Library for a different architecture</h2> <p> Cross-compilation is the process of compiling a program or library on a different architecture or operating system then it will be run upon. GLib is slightly more difficult to cross-compile than many packages because much of GLib is about hiding differences between different systems. </p> <p> These notes cover things specific to cross-compiling GLib; for general information about cross-compilation, see the <a class="ulink" href="http://mesonbuild.com/Cross-compilation.html" target="_top">meson</a> info pages. </p> <p> GLib tries to detect as much information as possible about the target system by compiling and linking programs without actually running anything; however, some information GLib needs is not available this way. This information needs to be provided to meson via a ‘cross file’. </p> <p> As an example of using a cross file, to cross compile for the ‘MingW32’ Win64 runtime environment on a Linux system, create a file <code class="filename">cross_file.txt</code> with the following contents: </p> <pre class="programlisting"> [host_machine] system = 'windows' cpu_family = 'x86_64' cpu = 'x86_64' endian = 'little' [properties] c_args = [] c_link_args = [] [binaries] c = 'x86_64-w64-mingw32-gcc' cpp = 'x86_64-w64-mingw32-g++' ar = 'x86_64-w64-mingw32-ar' ld = 'x86_64-w64-mingw32-ld' objcopy = 'x86_64-w64-mingw32-objcopy' strip = 'x86_64-w64-mingw32-strip' pkgconfig = 'x86_64-w64-mingw32-pkg-config' windres = 'x86_64-w64-mingw32-windres' </pre> <p> Then execute the following commands: </p> <pre class="programlisting"> meson --cross-file cross_file.txt builddir </pre> <p> The complete list of cross properties follows. Most of these won't need to be set in most cases. </p> </div> <div class="refsect1"> <a name="cross-properties"></a><h2>Cross properties</h2> <p><b>have_[function]. </b> When meson checks if a function is supported, the test can be overridden by setting the <code class="literal">have_<em class="replaceable"><code>function</code></em></code> property to <code class="constant">true</code> or <code class="constant">false</code>. For example </p> <pre class="programlisting">Checking for function "fsync" : YES</pre> <p> can be overridden by setting </p> <pre class="programlisting">have_fsync = false</pre> <p> </p> <p><b>growing_stack=[true/false]. </b> Whether the stack grows up or down. Most places will want <code class="constant">false</code>. A few architectures, such as PA-RISC need <code class="constant">true</code>. </p> <p><b>have_strlcpy=[true/false]. </b> Whether you have <code class="function">strlcpy()</code> that matches OpenBSD. Defaults to <code class="constant">false</code>, which is safe, since GLib uses a built-in version in that case. </p> <p><b>va_val_copy=[true/false]. </b> Whether <span class="type">va_list</span> can be copied as a pointer. If set to <code class="constant">false</code>, then <code class="function">memcopy()</code> will be used. Only matters if you don't have <code class="function">va_copy()</code> or <code class="function">__va_copy()</code>. (So, doesn't matter for GCC.) Defaults to <code class="constant">true</code> which is slightly more common than <code class="constant">false</code>. </p> <p><b>have_c99_vsnprintf=[true/false]. </b> Whether you have a <code class="function">vsnprintf()</code> with C99 semantics. (C99 semantics means returning the number of bytes that would have been written had the output buffer had enough space.) Defaults to <code class="constant">false</code>. </p> <p><b>have_c99_snprintf=[true/false]. </b> Whether you have a <code class="function">snprintf()</code> with C99 semantics. (C99 semantics means returning the number of bytes that would have been written had the output buffer had enough space.) Defaults to <code class="constant">false</code>. </p> </div> </div> <div class="footer"> <hr>Generated by GTK-Doc V1.32</div> </body> </html>