I'm trying to install linux headers for cygwin using crostool-ng.
ct-ng basically invokes the line:
make -C /home/richard/scratch/x86linux/.build/src/linux-3.5
O=/home/richard/scratch/x86linux/.build/i386-unknown-linux-gnu/build/build-kernel-headers
ARCH=x86
INSTALL_HDR_PATH=/home/richard/x-tools/i386-unknown-linux-gnu/i386-unknown-linux-gnu/sysroot/usr
V=1 headers_install
and it seems to have checked out v3.5 of the linux kernel.
The problem is that making the headers seems to require an existing set
of headers already installed. The required headers seem to be in the
include/ and arch/[target]/ directories.
What is the "correct" way to get the Makefile to use the source tree as
the source for the linux headers?
In the top-level Makefile, I can see the following variable
LINUXINCLUDE := -I$(srctree)/arch/$(hdr-arch)/include \
-Iarch/$(hdr-arch)/include/generated -Iinclude \
$(if $(KBUILD_SRC), -I$(srctree)/include) \
-include $(srctree)/include/linux/kconfig.h
but I'm not sure how to get this variable picked up. And I don't exactly
know what to do with KBUILD_SRC.
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