This post is very old - but nothing has changes as far as AOSP is
concerned, so in case anyone is interested and runs into this problem when
building for QEMU:
There is actually a nice and shorter way to build the kernel for your QEMU
target provided by the AOSP:
1. cd to your kernel source dir (Only goldfish 2.6.29 works out of the box
for the emulator)
2. ${ANDROID_BUILD_TOP}/external/qemu/distrib/build-kernel.sh -j=64
--arch=x86 --out=$YourOutDir
3. emulator -kernel ${YourOutDir}/kernel-qemu # run emulator:
Step #2 calls the toolbox.sh wrapper scripts which works around the SSE
disabling gcc warning - which happens for GCC < 4.5 (as in the AOSP
prebuilt X86 toolchain).
This script adds the " -mfpmath=387 -fno-pic" in case it is an X86 and
that in turn eliminates the compilation errors seen above.
To have finer control over the build process, you can use the "toolbox.sh"
wrapper and set some other stuff without modifying the script files.
An example for building the same emulator is below:
# Set arch
export ARCH=x86
# Have make refer to the QEMU wrapper script for building android over x86
(eliminates the errors listed above)
export
CROSS_COMPILE=${ANDROID_BUILD_TOP}/external/qemu/distrib/kernel-toolchain/android-kernel-toolchain-
# Put your cross compiler here. I am using the AOSP prebuilt one in this
example
export
REAL_CROSS_COMPILE=${ANDROID_BUILD_TOP}/prebuilt/linux-x86/toolchain/i686-android-linux-4.4.3/bin/i686-android-linux-
# Configure your kernel - here I am taking the default goldfish_defconfig
make goldfish_defconfig
# build
make -j64
# Run emulator:
emulator -kernel arch/x86/boot/bzImage -show-kernel
This works for the 2.6.29 goldfish branch. If anyone is using the emulator
with a 3+ kernel I would be like to hear about it.
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