Drop version.h

Some distributions use their own Makefile and thus won't create version.h,
resulting in a build failure. Pass the version as define instead.
That won't help for generating the driver version with those distributions,
but at least the driver will build.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>

.gitignore

@@ -1 +0,0 @@
-version.h

Makefile

@@ -44,17 +44,13 @@ all: modules
 
 # Targets for running make directly in the external module directory:
 
-DRIVER_VERSION = $(shell git describe --long)
+EXTRA_CFLAGS=-DIT87_DRIVER_VERSION='\"$(shell git describe --long)\"'
 
-version.h: it87.c
-	@echo "#define IT87_DRIVER_VERSION	\"$(DRIVER_VERSION)\"" > version.h
-
-modules: version.h
-	@$(MAKE) -C $(KERNEL_BUILD) M=$(CURDIR) $@
+modules:
+	@$(MAKE) EXTRA_CFLAGS=$(EXTRA_CFLAGS) -C $(KERNEL_BUILD) M=$(CURDIR) $@
 
 clean:
 	@$(MAKE) -C $(KERNEL_BUILD) M=$(CURDIR) $@
-	rm -f version.h
 
 install: modules_install
 

it87.c

@@ -74,7 +74,10 @@
 #include <linux/acpi.h>
 #include <linux/io.h>
 #include "compat.h"
-#include "version.h"
+
+#ifndef IT87_DRIVER_VERSION
+#define IT87_DRIVER_VERSION	"<not provided>"
+#endif
 
 #define DRVNAME "it87"