Re: [Ltib] config option use BSP kernel headers with >= linux-2.6.17

[Peter Barada]

On 03/19/2013 03:35 PM, Aaron Wegner wrote:
> Going through the Git log of the Linux kernel it seems like there has been
> a basic implementation of 'make headers_install' since about 2.6.17.  I
> was trying to install the headers of a 3.8 kernel and running into some
> problems.  I seemed to be able to overcome these by editing
> dist/lfs-5.1/kernel/kernel-common.tmpl and replacing the
> PKG_KERNEL_WANT_HEADERS section with the following.
>
> if [ -n "$PKG_KERNEL_WANT_HEADERS" ]
> then
>     make ARCH=$LINTARCH HOSTCC="$BUILDCC"
> INSTALL_HDR_PATH=$RPM_BUILD_ROOT/%{pfx}/usr/src/linux headers_install
> fi
>
> Maybe this could be a patch?  Not exactly sure how to specify the
> condition that the kernel version is greater than or equal to one in which
> the 'make headers_install' is working well, but for recent kernels the
> current LTIB spec file fails since the includes are reordered from the old
> way.
Some platforms use pre-2.6.17 kernels so you'll need code to switch
between the headers_intall and the old method to install the kernel
headers...


You could add the following to your platform main.lkc

config PKG_KERNEL_WANT_HEADERS_INSTALL
    bool "install kernel headers using headers_install"
    help
      Post 2.6.17 kernels use "make headers_install" to install kernel
headers into sysroot; select
      2.6.17 and newer kernels

Then in dist/lfs-5.1/kernel/kernel-common.tmpl modify the header
installation to use headers_install if PKG_KERNEL_WANT_HEADERS_INSTALLED
is enabled, else fall back to the old method:

diff --git a/dist/lfs-5.1/kernel/kernel-common.tmpl
b/dist/lfs-5.1/kernel/kernel-common.tmpl
index 3edda42..a1df62f 100644
--- a/dist/lfs-5.1/kernel/kernel-common.tmpl
+++ b/dist/lfs-5.1/kernel/kernel-common.tmpl
@@ -296,31 +296,36 @@ fi
 if [ -n "$PKG_KERNEL_WANT_HEADERS" ]
 then
     mkdir -p $RPM_BUILD_ROOT/%{pfx}/usr/src/linux/include
-    for i in asm-${LINTARCH} asm-generic config linux math-emu media
mtd net pcmcia rxrpc scsi sound video
-    do
-        if [ -d include/$i ]
-        then
-            cp -a include/$i $RPM_BUILD_ROOT/%{pfx}/usr/src/linux/include
-        fi
-    done
+    if [ -n "$PKG_KERNEL_WANT_HEADERS_INSTALL" ]
+    then
+        make ARCH=${LINTARCH} HOSTCC="$BUILDCC" headers_install
INSTALL_HDR_PATH=$RPM_BUILD_ROOT/%{pfx}/usr/src/linux
+    else
+        for i in asm-${LINTARCH} asm-generic config linux math-emu
media mtd net pcmcia rxrpc scsi sound video generated
+        do
+            if [ -d include/$i ]
+            then
+                cp -a include/$i
$RPM_BUILD_ROOT/%{pfx}/usr/src/linux/include
+            fi
+    done
 
-    for i in asm config linux
-    do
-        if [ -d $KBOUT/include/$i ]
-        then
-            cp -a $KBOUT/include/$i
$RPM_BUILD_ROOT/%{pfx}/usr/src/linux/include
-        fi
-    done
+    for i in asm config linux
+    do
+            if [ -d $KBOUT/include/$i ]
+            then
+        cp -a $KBOUT/include/$i
$RPM_BUILD_ROOT/%{pfx}/usr/src/linux/include
+            fi
+    done
 
-    if [ "${LINTARCH}" = "arm" ]
-    then
-        if [ -d "$KBOUT/include/asm/arch" ]
-        then
-            mkdir -p $RPM_BUILD_ROOT/%{pfx}/usr/src/linux/include/asm/arch
-            cp -a $KBOUT/include/asm/arch/*
$RPM_BUILD_ROOT/%{pfx}/usr/src/linux/include/asm/arch
-        else
-            echo "Don't know how to copy asm headers for this kernel"
-        fi
+    if [ "${LINTARCH}" = "arm" ]
+    then
+            if [ -d "$KBOUT/include/asm/arch" ]
+            then
+        mkdir -p $RPM_BUILD_ROOT/%{pfx}/usr/src/linux/include/asm/arch
+        cp -a $KBOUT/include/asm/arch/*
$RPM_BUILD_ROOT/%{pfx}/usr/src/linux/include/asm/arch
+            else
+        echo "Don't know how to copy asm headers for this kernel"
+            fi
+    fi
     fi
 fi

Then if you "./ltib -c" and select the "install kernel headers using
headers_install" to enable it, save/exit it should build/install your
kernel, and then install the headers using the headers_install target.

-- 
Peter Barada
address@hidden