From aaf3aced55a3dba302ab4a25559607be8703c563 Mon Sep 17 00:00:00 2001
From: midipix <writeonce@midipix.org>
Date: Sep 22 2016 02:32:56 +0000
Subject: build system: when building from a git repo, explicitly depend on .git/index.


---

diff --git a/Makefile.in b/Makefile.in
index 1a30a9f..1bbc47f 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -2,7 +2,7 @@ PACKAGE 		= @package@
 NICKNAME 		= @nickname@
 PROJECT_DIR 		= @project_dir@
 SOURCE_DIR 		= @source_dir@
-GIT_REFERENCE_DIR	= @git_reference_dir@
+GIT_REFERENCE_INDEX	= @git_reference_index@
 CUSTOM_INSTALL_HEADERS  = @custom_install_headers@
 AVOID_VERSION		= @avoid_version@
 
@@ -219,7 +219,7 @@ host.tag:	Makefile
 		$(PROJECT_DIR)/sysinfo/host/host.sh --compiler="$(CC)" --cflags="$(CFLAGS)"
 		touch host.tag
 
-version.tag:	$(GIT_REFERENCE_DIR)
+version.tag:	$(GIT_REFERENCE_INDEX)
 		$(PROJECT_DIR)/sysinfo/version.sh	\
 			-s $(SOURCE_DIR)		\
 			-o build/$(PACKAGE)_version.h	\
diff --git a/configure b/configure
index 83de4b6..98efb4f 100755
--- a/configure
+++ b/configure
@@ -138,10 +138,10 @@ common_defaults()
 	# git
 	if [ -n "$mb_source_dir" ]; then
 		if [ -d "$mb_source_dir/.git" ]; then
-			mb_git_reference_dir="\$(SOURCE_DIR)/.git"
+			mb_git_reference_index="\$(SOURCE_DIR)/.git/index"
 		fi
 	elif [ -d "$mb_project_dir/.git" ]; then
-		mb_git_reference_dir="\$(PROJECT_DIR)/.git"
+		mb_git_reference_index="\$(PROJECT_DIR)/.git/index"
 	fi
 
 	# project
@@ -390,7 +390,7 @@ config_copy()
 			-e 's^@nickname@^'"$mb_nickname"'^g'				\
 			-e 's^@project_dir@^'"$mb_project_dir"'^g'			\
 			-e 's^@source_dir@^'"$mb_source_dir"'^g'			\
-			-e 's^@git_reference_dir@^'"$mb_git_reference_dir"'^g'		\
+			-e 's^@git_reference_index@^'"$mb_git_reference_index"'^g'	\
 			-e 's^@custom_install_headers@^'"$mb_custom_install_headers"'^g' \
 			-e 's^@avoid_version@^'"$mb_avoid_version"'^g'			\
 											\