SLES Fixes (Part 1):

- ZFS_AC_KERNEL updated to exclude -obj entries in /usr/src/ when
  attempting to automatically detect your kernel source.
- ZFS_AC_KERNEL check for *-obj directory when attempting to
  detect the objects for your kernel source.
- ZFS_AC_SPL updated to additionally check for Modules.symvers build
  product.  This seems to be specific to SLES system, for Vanilla,
  Fedora, RHEL, and Chaos kernels the symbol file is just called
  Module.symvers.
- ZFS_CHECK_SYMBOL_EXPORT also should also check the exported SPL
  symbols in addition to the exported core kernel systems.

config/zfs-build.m4

@@ -1,6 +1,4 @@
 AC_DEFUN([ZFS_AC_KERNEL], [
-	ver=`uname -r`
-
 	AC_ARG_WITH([linux],
 		AS_HELP_STRING([--with-linux=PATH],
 		[Path to kernel source]),
@@ -13,12 +11,12 @@ AC_DEFUN([ZFS_AC_KERNEL], [
 
 	AC_MSG_CHECKING([kernel source directory])
 	if test -z "$kernelsrc"; then
-		kernelbuild=
-		sourcelink=`ls -1d /usr/src/kernels/* /usr/src/linux-* 2>/dev/null | tail -1`
+		sourcelink=`ls -1d /usr/src/kernels/* /usr/src/linux-* \
+                            2>/dev/null | grep -v obj | tail -1`
 
 		if test -e $sourcelink; then
 			kernelsrc=`readlink -f ${sourcelink}`
-			kernelbuild=${kernelsrc}
+			kernelbuild=
 		else
 			AC_MSG_RESULT([Not found])
 			AC_MSG_ERROR([
@@ -33,6 +31,11 @@ AC_DEFUN([ZFS_AC_KERNEL], [
 
 	AC_MSG_RESULT([$kernelsrc])
 	AC_MSG_CHECKING([kernel build directory])
+        if test -z "$kernelbuild" && test -d ${kernelsrc}-obj; then
+                kernelbuild=${kernelsrc}-obj/`arch`/`arch`
+        else
+                kernelbuild=${kernelsrc}
+        fi
 	AC_MSG_RESULT([$kernelbuild])
 
 	AC_MSG_CHECKING([kernel source version])
@@ -72,7 +75,6 @@ AC_DEFUN([ZFS_AC_KERNEL], [
 ])
 
 AC_DEFUN([ZFS_AC_SPL], [
-
 	AC_ARG_WITH([spl],
 		AS_HELP_STRING([--with-spl=PATH],
 		[Path to spl source]),
@@ -118,14 +120,18 @@ AC_DEFUN([ZFS_AC_SPL], [
 	AC_MSG_CHECKING([spl Module.symvers])
 	if test -r $splbuild/module/Module.symvers; then
 		splsymvers=$splbuild/module/Module.symvers
+	elif test -r $splbuild/module/Modules.symvers; then
+		splsymvers=$splbuild/module/Modules.symvers
 	elif test -r $kernelbuild/include/spl/Module.symvers; then
 		splsymvers=$kernelbuild/include/spl/Module.symvers
+	elif test -r $kernelbuild/include/spl/Modules.symvers; then
+		splsymvers=$kernelbuild/include/spl/Modules.symvers
 	fi
 
 	if test -z "$splsymvers"; then
 	        AC_MSG_RESULT([Not found])
 	        AC_MSG_ERROR([
-                *** Cannot find extra Module.symvers in the spl source.
+                *** Cannot find extra Module{s}.symvers in the spl source.
                 *** Please prepare the spl source before running this script])
 	fi
 
@@ -330,7 +336,8 @@ dnl # check symbol exported or not
 dnl #
 AC_DEFUN([ZFS_CHECK_SYMBOL_EXPORT],
 	[AC_MSG_CHECKING([whether symbol $1 is exported])
-	grep -q -E '[[[:space:]]]$1[[[:space:]]]' $LINUX/Module.symvers 2>/dev/null
+	grep -q -E '[[[:space:]]]$1[[[:space:]]]' \
+		$LINUX/Module.symvers $splsymvers 2>/dev/null
 	rc=$?
 	if test $rc -ne 0; then
 		export=0