From 5facdbb29169c2799c42f887cef4cd9d087b0167 Mon Sep 17 00:00:00 2001
From: Victor Stinner <victor.stinner@gmail.com>
Date: Tue, 2 May 2017 21:42:48 +0200
Subject: [PATCH] bpo-30232: Support Git worktree in configure.ac (#1391)

Don't test if .git/HEAD file exists, but only if the .git file (or
directory) exists.
---
 configure.ac | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/configure.ac b/configure.ac
index c58322dc8c7..69d2c135bb6 100644
--- a/configure.ac
+++ b/configure.ac
@@ -29,7 +29,7 @@ AC_SUBST(GITVERSION)
 AC_SUBST(GITTAG)
 AC_SUBST(GITBRANCH)
 
-if test -e $srcdir/.git/HEAD
+if test -e $srcdir/.git
 then
 AC_CHECK_PROG(HAS_GIT, git, found, not-found)
 else