[glib: 1/2] Update documentation with FreeBSD build instructions

[Philip Withnall <pwithnall src gnome org>]

commit 4d362a5afe60e37e5fe1b5a64f575090707f667c
Author: rim <rozhuk im gmail com>
Date:   Fri Sep 20 22:32:12 2019 +0300

    Update documentation with FreeBSD build instructions

 docs/reference/glib/building.xml | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)
---
diff --git a/docs/reference/glib/building.xml b/docs/reference/glib/building.xml
index 79567f6f7..720a6ff84 100644
--- a/docs/reference/glib/building.xml
+++ b/docs/reference/glib/building.xml
@@ -26,6 +26,12 @@
         <userinput>ninja -C _build</userinput>
         <userinput>ninja -C _build install</userinput>
       </literallayout>
+
+      On FreeBSD:
+      <literallayout>
+        <userinput>env CPPFLAGS="-I/usr/local/include" LDFLAGS="-L/usr/local/lib -Wl,--disable-new-dtags" 
meson -Dxattr=false -Dinstalled_tests=true -Diconv=external -Db_lundef=false _build</userinput>
+        <userinput>ninja -C _build</userinput>
+      </literallayout>
     </para>
 
     <para>
@@ -119,6 +125,16 @@
           operating systems as well.
         </para>
       </listitem>
+      <listitem>
+        <para>
+          Python 3.5 or newer is required. Your system Python must
+          conform to <ulink
+          url="https://www.python.org/dev/peps/pep-0394/";>PEP 394
+          </ulink>
+          For FreeBSD, this means that the
+          <literal>lang/python3</literal> port must be installed.
+        </para>
+      </listitem>
       <listitem>
         <para>
           The libintl library from the <ulink