[Clfs-dev] [ GIT-0.0.1-20120922-arm] Compile MIPS Kernel: Add CFLAGS_KERNEL: Ticket-835

[knjterrell at mybluelight.com]

From: kanj <knjterrell at mybluelight.com>

---
 BOOK/bootable/mips/kernel.xml |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/BOOK/bootable/mips/kernel.xml b/BOOK/bootable/mips/kernel.xml
index cc0d5fb..2251fd6 100644
--- a/BOOK/bootable/mips/kernel.xml
+++ b/BOOK/bootable/mips/kernel.xml
@@ -59,7 +59,7 @@
    href="../x86/kernel.xml"
    xpointer="xpointer(//*[@os='j'])"/>
 
-<screen os="k"><userinput>make ARCH=${CLFS_ARCH} CROSS_COMPILE=${CLFS_TARGET}- </userinput></screen>
+<screen os="k"><userinput>make CFLAGS_KERNEL='-Wno-error=unused-but-set-variable' ARCH=${CLFS_ARCH} CROSS_COMPILE=${CLFS_TARGET}- </userinput></screen>
 
    <xi:include xmlns:xi="http://www.w3.org/2003/XInclude"
    href="../x86/kernel.xml"
@@ -92,7 +92,7 @@
    href="../x86/kernel.xml"
    xpointer="xpointer(//*[@os='s'])"/>
 
-<screen os="t"><userinput>cp arch/${CLFS_ARCH}/boot/vmlinux ${CLFS}/boot/clfskernel-&linux-version;</userinput></screen>
+<screen os="t"><userinput>cp vmlinux ${CLFS}/boot/clfskernel-&linux-version;</userinput></screen>
 
    <xi:include xmlns:xi="http://www.w3.org/2003/XInclude"
    href="../x86/kernel.xml"
-- 
1.7.9.5

I have used this to compile the kernel, using the mipssim_defconfig, for mips and mipsel configurations. 
I was able to verify minimal using QEMU. I also did the same with the malta_defconfig.

The ticket pointed to making changes in the make file. I also found the following reference that points to changes 
to the kernel:

https://dev.openwrt.org/browser/trunk/target/linux/generic/patches-2.6.38/970-mips-gcc-4.6-set-but-unused-fixes.patch?rev=31192

I verified this to work, but it appears that different kernel configs trip this issue at different points, so that 
this couldnt serve as the basis for a generic patch.

Additionally, I verified that vmlinux does not show in the .../boot directory.

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