From d8f33f02527c5773438c2a29308edf25d06ce573 Mon Sep 17 00:00:00 2001
From: Kay Sievers <kay.sievers@vrfy.org>
Date: Mon, 25 Jan 2010 08:22:47 +0100
Subject: keymap: linux/input.h - get absolute include path from gcc

---
 Makefile.am  | 2 +-
 configure.ac | 5 +++++
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/Makefile.am b/Makefile.am
index b7ced1dc7f..3567af81a6 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -546,7 +546,7 @@ udevkeymapforcereldir = $(libexecdir)/keymaps/force-release
 dist_udevkeymapforcerel_DATA = \
 	extras/keymap/force-release-maps/samsung-other
 
-extras/keymap/keys.txt: /usr/include/linux/input.h
+extras/keymap/keys.txt: $(INCLUDE_PREFIX)/linux/input.h
 	mkdir -p extras/keymap
 	$(AM_V_GEN)$(AWK) '/^#define.*KEY_[^ ]+[ \t]+[0-9]/ { if ($$2 != "KEY_MAX") { print $$2 } }' < $< | sed 's/^KEY_COFFEE$$/KEY_SCREENLOCK/' > $@
 
diff --git a/configure.ac b/configure.ac
index 08df0a9dec..4cecb868f5 100644
--- a/configure.ac
+++ b/configure.ac
@@ -81,6 +81,9 @@ if test "x$enable_extras" = xyes; then
 			AC_MSG_ERROR([pci.ids not found, try --with-pci-ids-path=])
 		fi])
 	AC_SUBST(PCI_DATABASE)
+
+	AC_CHECK_HEADER([linux/input.h], [:], AC_MSG_ERROR([kernel headers not found]))
+	AC_SUBST([INCLUDE_PREFIX], [$(echo '#include <linux/input.h>' | eval $ac_cpp -E - | sed -n '/linux\/input.h/ {s:.*"\(.*\)/linux/input.h".*:\1:; p; q}')])
 fi
 AM_CONDITIONAL([ENABLE_EXTRAS], [test "x$enable_extras" = xyes])
 
@@ -126,6 +129,8 @@ AC_MSG_RESULT([
 	mandir:			${mandir}
 	includedir:		${includedir}
 
+	include_prefix:		${INCLUDE_PREFIX}
+
 	logging:		${enable_logging}
 	debug:			${enable_debug}
 	selinux:		${with_selinux}
-- 
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