Merge the /deve/uclinux branch back to /trunk:

- add support for uClinux, the MMU-less ports of Linux.

 -------- diffstat follows --------
 /trunk/scripts/build/kernel/linux.sh      |  100     1    99     0 ---------------
 /trunk/steps.mk                           |    1     1     0     0 +
 /trunk/config/kernel/linux.in             |  247     0   247     0 -------------------------------------
 /trunk/config/kernel.in                   |    2     1     1     0
 /trunk/config/libc/glibc.in               |    2     1     1     0
 /trunk/config/libc/eglibc.in              |    2     1     1     0
 /trunk/config/libc/glibc-eglibc.in-common |    5     5     0     0 +
 /trunk/config/config.in                   |    1     1     0     0 +
 8 files changed, 11 insertions(+), 349 deletions(-)

1 files changed, 99 insertions, 0 deletions

diff --git a/scripts/build/kernel/linux-common.sh b/scripts/build/kernel/linux-common.sh
new file mode 100644
index 00000000..fa6a9dde
--- /dev/null
+++ b/scripts/build/kernel/linux-common.sh
@@ -0,0 +1,99 @@
+# This file declares functions to install the kernel headers for linux
+# Copyright 2007 Yann E. MORIN
+# Licensed under the GPL v2. See COPYING in the root of this package
+
+CT_DoKernelTupleValues() {
+    # Nothing to do, keep the default value
+    :
+}
+
+# Download the kernel
+do_kernel_get() {
+    if [ "${CT_KERNEL_LINUX_USE_CUSTOM_HEADERS}" != "y" ]; then
+        CT_GetFile "linux-${CT_KERNEL_VERSION}" \
+                   {ftp,http}://ftp.{de.,eu.,}kernel.org/pub/linux/kernel/v2.{6{,/testing},4,2}
+    fi
+    return 0
+}
+
+# Extract kernel
+do_kernel_extract() {
+    if [ "${CT_KERNEL_LINUX_USE_CUSTOM_HEADERS}" != "y" ]; then
+        CT_Extract "linux-${CT_KERNEL_VERSION}"
+        CT_Patch "linux-${CT_KERNEL_VERSION}"
+    fi
+    return 0
+}
+
+# Wrapper to the actual headers install method
+do_kernel_headers() {
+    CT_DoStep INFO "Installing kernel headers"
+
+    if [ "${CT_KERNEL_LINUX_USE_CUSTOM_HEADERS}" = "y" ]; then
+        do_kernel_custom
+    else
+        do_kernel_install
+    fi
+
+    CT_EndStep
+}
+
+# Install kernel headers using headers_install from kernel sources.
+do_kernel_install() {
+    CT_DoLog DEBUG "Using kernel's headers_install"
+
+    mkdir -p "${CT_BUILD_DIR}/build-kernel-headers"
+    cd "${CT_BUILD_DIR}/build-kernel-headers"
+
+    # Only starting with 2.6.18 does headers_install is usable. We only
+    # have 2.6 version available, so only test for sublevel.
+    k_sublevel=$(awk '/^SUBLEVEL =/ { print $3 }' "${CT_SRC_DIR}/linux-${CT_KERNEL_VERSION}/Makefile")
+    [ ${k_sublevel} -ge 18 ] || CT_Abort "Kernel version >= 2.6.18 is needed to install kernel headers."
+
+    V_OPT="V=${CT_KERNEL_LINUX_VERBOSE_LEVEL}"
+
+    CT_DoLog EXTRA "Installing kernel headers"
+    CT_DoExecLog ALL                                    \
+    make -C "${CT_SRC_DIR}/linux-${CT_KERNEL_VERSION}"  \
+         O=$(pwd)                                       \
+         ARCH=${CT_KERNEL_ARCH}                         \
+         INSTALL_HDR_PATH="${CT_SYSROOT_DIR}/usr"       \
+         ${V_OPT}                                       \
+         headers_install
+
+    if [ "${CT_KERNEL_LINUX_INSTALL_CHECK}" = "y" ]; then
+        CT_DoLog EXTRA "Checking installed headers"
+        CT_DoExecLog ALL                                    \
+        make -C "${CT_SRC_DIR}/linux-${CT_KERNEL_VERSION}"  \
+             O=$(pwd)                                       \
+             ARCH=${CT_KERNEL_ARCH}                         \
+             INSTALL_HDR_PATH="${CT_SYSROOT_DIR}/usr"       \
+             ${V_OPT}                                       \
+             headers_check
+        find "${CT_SYSROOT_DIR}" -type f -name '.check*' -exec rm {} \;
+    fi
+}
+
+# Use custom headers (most probably by using make headers_install in a
+# modified (read: customised) kernel tree, or using pre-2.6.18 headers, such
+# as 2.4). In this case, simply copy the headers in place
+do_kernel_custom() {
+    local tar_opt
+
+    CT_DoLog EXTRA "Installing custom kernel headers"
+
+    mkdir -p "${CT_SYSROOT_DIR}/usr"
+    cd "${CT_SYSROOT_DIR}/usr"
+    if [ "${CT_KERNEL_LINUX_CUSTOM_IS_TARBALL}" = "y" ]; then
+        case "${CT_KERNEL_LINUX_CUSTOM_PATH}" in
+            *.tar)      ;;
+            *.tgz)      tar_opt=--gzip;;
+            *.tar.gz)   tar_opt=--gzip;;
+            *.tar.bz2)  tar_opt=--bzip2;;
+            *.tar.lzma) tar_opt=--lzma;;
+        esac
+        CT_DoExecLog ALL tar x ${tar_opt} -vf ${CT_KERNEL_LINUX_CUSTOM_PATH}
+    else
+        CT_DoExecLog ALL cp -rv "${CT_KERNEL_LINUX_CUSTOM_PATH}/include" .
+    fi
+}