From d545384a2b719f84a9a27ca7502f05325a49e646 Mon Sep 17 00:00:00 2001
From: Rik Faith <faith@alephnull.com>
Date: Mon, 17 Jan 2000 10:27:29 +0000
Subject: Try a more complex (and more correct?) method for finding kernel
 inlcude     files

---
 linux/Makefile.linux | 50 +++++++++++++++++++++++++++++++-------------------
 linux/picker.c       |  2 ++
 2 files changed, 33 insertions(+), 19 deletions(-)

diff --git a/linux/Makefile.linux b/linux/Makefile.linux
index b91d5984..63092770 100644
--- a/linux/Makefile.linux
+++ b/linux/Makefile.linux
@@ -1,6 +1,6 @@
 # Makefile -- For the Direct Rendering Manager module (drm)
 # Created: Mon Jan  4 09:26:53 1999 by faith@precisioninsight.com
-# Revised: Thu Jan 13 09:53:33 2000 by faith@precisioninsight.com
+# Revised: Mon Jan 17 05:25:12 2000 by faith@precisioninsight.com
 #
 # Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
 # All rights reserved.
@@ -70,27 +70,39 @@ VERSION := $(shell uname -r)
 A := /usr/src/linux-$(VERSION)/include
 B := /usr/src/linux/include
 C := /usr/include
-# This detection seems to be broken.
-#TREE := $(shell                                                   \
-#	if grep -q $(VERSION) $A/linux/version.h; then echo $A;   \
-#	elif grep -q $(VERSION) $B/linux/version.h; then echo $B; \
-#	elif grep -q $(VERSION) $C/linux/version.h; then echo $C; \
-#	else echo 0; fi)
-# I'm simplifying it
-TREE := $(shell                                                   \
-	if [ -d $A ] ; then echo $A;   \
-	elif [ -d $B ] ; then echo $B; \
-	elif [ -d $C ] ; then echo $C; \
-	else echo 0; fi)
-
-
-ifeq "$TREE" "0"
-all:; echo Error: Could not locate kernel tree
+
+V := $(shell gcc -E -nostdinc -I$A picker.c 2>/dev/null \
+      | grep -s 'RELEASE = ' | cut -d' ' -f3)
+ifeq ($(V),"$(VERSION)")
+TREE := $A
+else
+  V := $(shell gcc -E -nostdinc -I$B picker.c 2>/dev/null \
+        | grep -s 'RELEASE = ' | cut -d' ' -f3)
+ifeq ($(V),"$(VERSION)")
+  TREE := $B
+else
+    V := $(shell gcc -E -nostdinc -I$C picker.c 2>/dev/null \
+          | grep -s 'RELEASE = ' | cut -d' ' -f3)
+ifeq ($(V),"$(VERSION)")
+    TREE := $C
+else
+    TREE := 0
+endif
+endif
+endif
+
+# To override this determination, pass the path on the make command line:
+# 	make TREE=/usr/my-kernel-tree/include
+# or hardcode a value for TREE here:
+# TREE:=/usr/include
+
+ifeq ($(TREE),0)
+all:; @echo Error: Could not locate kernel tree in $A $B $C
 else
 SMP := $(shell gcc -E -nostdinc -I$(TREE) picker.c 2>/dev/null \
-	| grep 'SMP = ' | cut -d' ' -f3)
+	| grep -s 'SMP = ' | cut -d' ' -f3)
 MODVERSIONS := $(shell gcc -E -I $(TREE) picker.c 2>/dev/null \
-	| grep 'MODVERSIONS = ' | cut -d' ' -f3)
+	| grep -s 'MODVERSIONS = ' | cut -d' ' -f3)
 all::;@echo KERNEL HEADERS IN $(TREE): SMP=${SMP} MODVERSIONS=${MODVERSIONS}
 all:: $(LIBS) $(MODS) $(PROGS)
 endif
diff --git a/linux/picker.c b/linux/picker.c
index 186f28b2..ecdb2c15 100644
--- a/linux/picker.c
+++ b/linux/picker.c
@@ -1,4 +1,5 @@
 #include <linux/autoconf.h>
+#include <linux/version.h>
 
 #ifndef CONFIG_SMP
 #define CONFIG_SMP 0
@@ -10,3 +11,4 @@
 
 SMP = CONFIG_SMP
 MODVERSIONS = CONFIG_MODVERSIONS
+RELEASE = UTS_RELEASE
-- 
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