busybox/examples/android-build
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   1#!/bin/sh
   2# Build Busybox against Android's bionic
   3# Originally by Dan Fandrich
   4#
   5# Configure with "make android_defconfig"
   6#
   7# This file has been tested on Android Froyo (the lack of ttyname_r in
   8# the android libc must be patched around) and Gingerbread.
   9
  10# Point this to the Android root directory; it's used in the defconfig CFLAGS
  11export A="$HOME/android"
  12
  13# Android product being built
  14P=zoom2
  15
  16# Toolchain version in use by this version of Android
  17GCCVER=4.4.3
  18
  19export PATH="$A/prebuilt/linux-x86/toolchain/arm-eabi-$GCCVER/bin:$PATH"
  20
  21# Set the linker flags; compiler flags are in the defconfig file
  22if grep "^CONFIG_STATIC=y" .config >/dev/null ; then
  23        # Static linking
  24        LDFLAGS="-static -Xlinker -z -Xlinker muldefs -nostdlib $A/out/target/product/$P/obj/lib/crtbegin_static.o $A/out/target/product/$P/obj/lib/crtend_android.o -L$A/out/target/product/$P/obj/lib -L$A/out/target/product/$P/obj/STATIC_LIBRARIES/libm_intermediates -L$A/out/target/product/$P/obj/STATIC_LIBRARIES/libc_intermediates"
  25        LDLIBS="m c gcc"
  26else
  27        # Dynamic linking
  28        LDFLAGS="-Xlinker -z -Xlinker muldefs -nostdlib -Bdynamic -Xlinker -T$A/build/core/armelf.x -Xlinker -dynamic-linker -Xlinker /system/bin/linker -Xlinker -z -Xlinker nocopyreloc -Xlinker --no-undefined $A/out/target/product/$P/obj/lib/crtbegin_dynamic.o $A/out/target/product/$P/obj/lib/crtend_android.o -L$A/out/target/product/$P/obj/lib"
  29        LDLIBS="dl m c gcc"
  30fi
  31
  32# It's possible with newer version
  33# you need to use CFLAGS_busybox instead of EXTRA_LDFLAGS below:
  34make EXTRA_LDFLAGS="$LDFLAGS" LDLIBS="$LDLIBS" "$@"
  35