From 1d68bab74cfe2323042571662496d89608e7ee79 Mon Sep 17 00:00:00 2001
From: Guenter Roeck <linux@roeck-us.net>
Date: Mon, 2 Oct 2017 10:53:44 -0700
Subject: [PATCH] Makefile: Versioning, take three

Make sure the build passes if the source is not in a git repository.
Again, that means that version information won't be available, but there
is only so much we can do about that.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
---
 Makefile | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/Makefile b/Makefile
index d4b96c3..1b88e2a 100644
--- a/Makefile
+++ b/Makefile
@@ -44,10 +44,14 @@ all: modules
 
 # Targets for running make directly in the external module directory:
 
-EXTRA_CFLAGS=-DIT87_DRIVER_VERSION='\"$(shell git describe --long)\"'
+ifneq ("","$(wildcard .git/*)")
+IT87_CFLAGS=-DIT87_DRIVER_VERSION='\"$(shell git describe --long)\"'
+else
+IT87_CFLAGS=-DIT87_DRIVER_VERSION='\"<unknown>\"'
+endif
 
 modules:
-	@$(MAKE) EXTRA_CFLAGS=$(EXTRA_CFLAGS) -C $(KERNEL_BUILD) M=$(CURDIR) $@
+	@$(MAKE) EXTRA_CFLAGS="$(IT87_CFLAGS)" -C $(KERNEL_BUILD) M=$(CURDIR) $@
 
 clean:
 	@$(MAKE) -C $(KERNEL_BUILD) M=$(CURDIR) $@
-- 
2.39.5