build: fix git detection for worktrees

When using additional git worktrees, .git is not a directory.

Signed-off-by: David Lamparter <equinox@diac24.net>

diff --git a/configure.ac b/configure.ac
index 628e0c8afc1dbce65b0f70cb5cc97219155bd040..35261aced4730bb57da3d074c53b42482887fad4 100755 (executable)
--- a/configure.ac
+++ b/configure.ac
@@ -860,7 +860,7 @@ fi
 AC_SUBST([EXTRAVERSION])
 
 if test "$with_pkg_git_version" = "yes"; then
-       if test -d "${srcdir}/.git"; then
+       if test -e "${srcdir}/.git"; then
                AC_DEFINE([GIT_VERSION], [1], [include git version info])
        else    with_pkg_git_version="no"
                AC_MSG_WARN([--with-pkg-git-version given, but this is not a git checkout])