Fix configure script to allow split build/source directories

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Hi all -

The SUSE kernel module packages allow you to generate RPMs for all installed kernels with one run of rpmbuild. This involves the use of one shared source tree at /usr/src/linux and a group of build trees rooted at /usr/src/linux-obj. The build trees contain the bare minimum needed for a kernel tree to be considered "configured."

With the current configure script, it's looking in the
- --with-kernel-source directory for a configured kernel when it should be looking in the directory provided by --with-kernel. When I specify

./configure --with-kernel=/usr/src/linux-obj/x86_64/smp \
--with-kernel-source=/usr/src/linux

it fails, since /usr/src/linux doesn't contain a configured kernel. I used KERNELBUILD, rather than just switching KERNELINC, because other tests (like the one for generic_drop_inode being exported) actually need to look at the full includes for the kernel.

- -Jeff

diff -ruNpX dontdiff scratch/trees/ocfs2-1.2/configure.in ocfs2-1.2.5.devel/configure.in
- --- scratch/trees/ocfs2-1.2/configure.in 2007-03-27 16:22:52.000000000 -0400
+++ ocfs2-1.2.5.devel/configure.in 2007-04-15 17:13:49.000000000 -0400
@@ -108,13 +108,14 @@ AC_ARG_WITH(kernel-source, [ --with-ker
AC_MSG_RESULT($kernelsourcedir)

KERNELSRC="$kernelsourcedir"
+KERNELBUILD="$kerneldir"
KERNELINC="$KERNELSRC/include"

- -if test ! -f "$KERNELINC/linux/autoconf.h"; then +if test ! -f "$KERNELBUILD/include/linux/autoconf.h"; then AC_MSG_ERROR(No configured kernel include tree found) fi

- -OCFS2_CHECK_KVER($KERNELINC, ksourceversion, "source") +OCFS2_CHECK_KVER("$KERNELBUILD/include", ksourceversion, "source")

if test "$kversion" != "$ksourceversion"; then

- --
Jeff Mahoney
SUSE Labs
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