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<h2><span class="refentrytitle">Compiling with libsoup</span></h2>
<p>Compiling with libsoup — Notes on compiling</p>
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<div class="refsect2">
<a name="id-1.2.2.3"></a><h3>Using pkg-config</h3>
<p>
Like other GNOME libraries, <span class="application">libsoup</span> uses
<span class="application">pkg-config</span> to provide compiler options. The
package name is "<code class="literal">libsoup-2.4</code>". So in your
<code class="literal">configure</code> script, you might specify something like:
</p>
<div class="informalexample"><pre class="programlisting">
PKG_CHECK_MODULES(LIBSOUP, [libsoup-2.4 >= 2.26])
AC_SUBST(LIBSOUP_CFLAGS)
AC_SUBST(LIBSOUP_LIBS)
</pre></div>
<p>
The "<code class="literal">2.4</code>" in the package name is the "API version"
(indicating "the version of the <span class="application">libsoup</span> API
that first appeared in version 2.4") and is essentially just part of
the package name.
</p>
</div>
<hr>
<div class="refsect2">
<a name="id-1.2.2.4"></a><h3>API Availability and Deprecation Warnings</h3>
<p>
If you want to restrict your program to a particular
<span class="application">libsoup</span> version or range of versions, you
can define <a class="link" href="libsoup-2.4-Version-Information.html#SOUP-VERSION-MIN-REQUIRED:CAPS" title="SOUP_VERSION_MIN_REQUIRED"><code class="literal">SOUP_VERSION_MIN_REQUIRED</code></a>
and/or <a class="link" href="libsoup-2.4-Version-Information.html#SOUP-VERSION-MAX-ALLOWED:CAPS" title="SOUP_VERSION_MAX_ALLOWED"><code class="literal">SOUP_VERSION_MAX_ALLOWED</code></a>.
Eg:
</p>
<div class="informalexample"><pre class="programlisting">
LIBSOUP_CFLAGS="$LIBSOUP_CFLAGS -DSOUP_VERSION_MIN_REQUIRED=SOUP_VERSION_2_36"
LIBSOUP_CFLAGS="$LIBSOUP_CFLAGS -DSOUP_VERSION_MAX_ALLOWED=SOUP_VERSION_2_40"
</pre></div>
<p>
The <code class="literal">SOUP_VERSION_MIN_REQUIRED</code> declaration states
that the code is not expected to compile on versions of
<span class="application">libsoup</span> older than the indicated version
(here, 2.36), and so the compiler should print warnings if the code
uses functions that were deprecated as of that release.
</p>
<p>
The <code class="literal">SOUP_VERSION_MAX_ALLOWED</code> declaration states
that the code <span class="emphasis"><em>is</em></span> expected to compile on versions
of <span class="application">libsoup</span> up to the indicated version
(here, 2.40), and so, when compiling the program against a newer
version than that, the compiler should print warnings if the code uses
functions that did not yet exist in the max-allowed release.
</p>
<p>
You can use <a class="link" href="libsoup-2.4-Version-Information.html#SOUP-CHECK-VERSION:CAPS" title="SOUP_CHECK_VERSION()"><code class="literal">SOUP_CHECK_VERSION</code></a>
to check the version of libsoup at compile time, to compile different
code for different <span class="application">libsoup</span> versions. (If
you are setting <code class="literal">SOUP_VERSION_MIN_REQUIRED</code> and
<code class="literal">SOUP_VERSION_MAX_ALLOWED</code> to different versions, as
in the example above, then you almost certainly need to be doing
this.)
</p>
</div>
<hr>
<div class="refsect2">
<a name="id-1.2.2.5"></a><h3>Headers</h3>
<p>
Code using <span class="application">libsoup</span> should do:
</p>
<div class="informalexample"><pre class="programlisting">
#include <libsoup/soup.h>
</pre></div>
<p>
Including individual headers rather than <code class="literal">soup.h</code> is not
recommended.
</p>
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