[beast: 12/23] BUILD: let --enable-devel-mode=auto decide 'no' if $srcdir/.git is missing

[Tim Janik <timj src gnome org>]

commit 22a1c5a3a6a2e6e76aba88112dcacce8ff972a53
Author: Tim Janik <timj gnu org>
Date:   Thu Oct 8 22:55:07 2015 +0200

    BUILD: let --enable-devel-mode=auto decide 'no' if $srcdir/.git is missing
    
    Signed-off-by: Tim Janik <timj gnu org>

 configure.ac |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 7b0f9ac..5a5a9bc 100644
--- a/configure.ac
+++ b/configure.ac
@@ -632,7 +632,8 @@ AC_PATH_PROG(UPDATE_MIME_DATABASE, update-mime-database)
 # check for development build rules, these usually require acess to .git/
 # if 'auto', enable devel mode for odd (development) versions
 AC_MSG_CHECKING(for ENABLE_DEVEL_MODE)
-[test x"$enable_devel_mode" = xauto && { echo " $BST_MICRO_VERSION" | grep -q '[13579]$' ; } && 
enable_devel_mode=yes]
+[test x"$enable_devel_mode" = xauto -a -d "$srcdir/.git/" &&
+  { echo " $BST_MICRO_VERSION" | grep -q '[13579]$' ; } && enable_devel_mode=yes]
 test x"$enable_devel_mode" = xyes || enable_devel_mode=no
 AM_CONDITIONAL(ENABLE_DEVEL_MODE, test x"$enable_devel_mode" = xyes)
 AC_MSG_RESULT([$enable_devel_mode])