[balsa/gtk3] Error if building in a git tree with GnomeKeyring

[Peter Bloomfield <peterb src gnome org>]

commit 967767102810eb5d751c84842a7769b962ddda88
Author: Peter Bloomfield <PeterBloomfield bellsouth net>
Date:   Sun Jul 24 17:10:05 2016 -0400

    Error if building in a git tree with GnomeKeyring
    
        * configure.ac: issue an error if building in a git tree with
          deprecated GnomeKeyring.

 ChangeLog    |    5 +++++
 configure.ac |    5 +++++
 2 files changed, 10 insertions(+), 0 deletions(-)
---
diff --git a/ChangeLog b/ChangeLog
index f7465fb..c7a789f 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2016-07-24  Peter Bloomfield  <pbloomfield bellsouth net>
+
+       * configure.ac: issue an error if building in a git tree with
+         deprecated GnomeKeyring.
+
 2016-07-23  Peter Bloomfield  <pbloomfield bellsouth net>
 
        Fix building with toolchains that predefine _FORTIFY_SOURCE
diff --git a/configure.ac b/configure.ac
index e5b8030..d6fe7c5 100644
--- a/configure.ac
+++ b/configure.ac
@@ -915,4 +915,9 @@ if test x"$BALSA_FROM_GIT" = xyes ; then
        echo "or just plain not work. Use it at your own risk. You have been warned."
        echo "======================================================================"
        echo ""
+        if test x$with_gnome_keyring == xyes ; then
+            AC_MSG_ERROR([Cannot build in a git tree with deprecated GnomeKeyring.
+                  Either install and configure with libsecret
+                  or configure --without-gnome.])
+        fi
 fi