platform_build/tools/check_identical_lib.sh

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#!/bin/bash
set -e
STRIP_PATH="${1}"
CORE="${2}"
VENDOR="${3}"
TMPDIR="$(mktemp -d ${CORE}.vndk_lib_check.XXXXXXXX)"
stripped_core="${TMPDIR}/core"
stripped_vendor="${TMPDIR}/vendor"
function cleanup() {
rm -f "${stripped_core}" "${stripped_vendor}"
rmdir "${TMPDIR}"
}
trap cleanup EXIT
function strip_lib() {
${STRIP_PATH} \
-i ${1} \
-o ${2} \
-d /dev/null \
--remove-build-id
}
strip_lib ${CORE} ${stripped_core}
strip_lib ${VENDOR} ${stripped_vendor}
if ! cmp -s ${stripped_core} ${stripped_vendor}; then
echo "ERROR: VNDK library $(basename ${CORE%.so}) has different core and" \
"vendor variants! This means that the copy used in the system.img/etc" \
"and vendor.img/etc images are different. In order to preserve space on" \
"some devices, it is helpful if they are the same. Frequently, " \
"libraries are different because they or their dependencies compile" \
"things based on the macro '__ANDROID_VNDK__' or they specify custom" \
"options under 'target: { vendor: { ... } }'. Here are some possible" \
"resolutions:"
echo "ERROR: 1). Remove differences, possibly using the libvndksupport" \
"function android_is_in_vendor_process in order to turn this into a" \
"runtime difference."
echo "ERROR: 2). Add the library to the VndkMustUseVendorVariantList" \
"variable in build/soong/cc/config/vndk.go, which is used to" \
"acknowledge this difference."
exit 1
fi