Document an instance of conditioned symbol

1 files changed, 15 insertions, 0 deletions

diff --git a/english/ports/hurd/hurd-devel-debian.wml b/english/ports/hurd/hurd-devel-debian.wml
index 4875b87c0ed..30062b2431e 100644
--- a/english/ports/hurd/hurd-devel-debian.wml
+++ b/english/ports/hurd/hurd-devel-debian.wml
@@ -120,6 +120,21 @@ has some fix already, which just needs to be extended to hurd-i386.</p>
 
 <ul>
 <li>
+<code>some symbols or patterns disappeared in the symbols file</code>
+<p>
+Some packages maintain a list of the symbols that are expected to appear in
+libraries. This list is however usually obtained on a Linux system, and thus
+include symbols which may not make sense on non-Linux systems (e.g. due a
+Linux-only feature). One can however introduce conditionals in the
+<code>.symbols</code> file, for instance:
+</p>
+
+<table><tr><td>&nbsp;</td><td class=example><pre>
+ (arch=linux-any)linuxish_function@Base 1.23
+</pre></td></tr></table>
+
+</li>
+<li>
 <code>Broken libc6 dependency</code>
 <p>
 Some packages use an erroneous dependency on <code>libc6-dev</code>. This