[gobject-introspection] [man] Mention XDG_DATA_DIRS

[Johan Dahlin <johan src gnome org>]

commit b4fdcffa6f11605d55ff124f396dc621eaf5334c
Author: Johan Dahlin <johan gnome org>
Date:   Fri Aug 13 10:32:37 2010 -0300

    [man] Mention XDG_DATA_DIRS

 docs/g-ir-scanner.1 |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)
---
diff --git a/docs/g-ir-scanner.1 b/docs/g-ir-scanner.1
index b43d3f1..602f89f 100644
--- a/docs/g-ir-scanner.1
+++ b/docs/g-ir-scanner.1
@@ -136,7 +136,10 @@ The example above will add a new method called get_with to the TestDrawable clas
 .B \--xpath-assertions=FILENAME
 Loads a list xpath assertions from FILENAME, this is useful for verifying
 that the GIR itself is properly generated.
-.TP
+.SH ENVIRONMENT VARIABLES
+The g-ir-scanner uses the XDG_DATA_DIRS variable to check for dirs,
+the gir's are located in XDG_DATA_DIRS/share/gir-1.0. It is normally
+set on a distribution so you shouldn't need to set it yourself.
 .SH BUGS
 Report bugs at http://bugzilla.gnome.org/ in the glib product and
 introspection component.