Document configure's -sysroot option

-sysroot has been undocumented so far.

Change-Id: I552f9233778de9490a3479292f0cda9c8c439282
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@nokia.com>

diff --git a/configure b/configure
index d1040ba..649ca5b 100755 (executable)
--- a/configure
+++ b/configure
@@ -3185,6 +3185,8 @@ Additional options:
 
     -xplatform target ... The target platform when cross-compiling.
 
+    -sysroot <dir> ...... Sets <dir> as the target compiler's and qmake's sysroot.
+
     -no-feature-<feature> Do not compile in <feature>.
     -feature-<feature> .. Compile in <feature>. The available features
                           are described in src/corelib/global/qfeatures.txt