Error when building/running on arm

[uberspot]

This was from adb logcat after running opentee-engine on a nexus 7 with android 5.1.1.
SELinux was permissive. Lunch target was aosp_arm-eng

D/tee_manager(32036): opentee/emulator/opentee-main/main.c:load_lib:166  Failed to load library, /system/lib/libManagerApi.so : dlopen failed: cannot locate symbol "mempcpy" referenced by "libCommonApi.so"...
D/tee_launcher(32037): opentee/emulator/opentee-main/main.c:load_lib:166  Failed to load library, /system/lib/libLauncherApi.so : dlopen failed: cannot locate symbol "mempcpy" referenced by "libCommonApi.so"...

---

$ cat /etc/opentee.conf
[PATHS]
ta_dir_path = /system/lib
core_lib_path = /system/lib
subprocess_manager = libManagerApi.so
subprocess_launcher = libLauncherApi.so

---

Output during make:

============================================
PLATFORM_VERSION_CODENAME=REL
PLATFORM_VERSION=5.1.51
TARGET_PRODUCT=aosp_arm
TARGET_BUILD_VARIANT=eng
TARGET_BUILD_TYPE=release
TARGET_BUILD_APPS=
TARGET_ARCH=arm
TARGET_ARCH_VARIANT=armv7-a
TARGET_CPU_VARIANT=generic
TARGET_2ND_ARCH=
TARGET_2ND_ARCH_VARIANT=
TARGET_2ND_CPU_VARIANT=
HOST_ARCH=x86_64
HOST_OS=linux
HOST_OS_EXTRA=Linux-3.11.0-26-generic-x86_64-with-Ubuntu-12.04-precise
HOST_BUILD_TYPE=release
BUILD_ID=AOSP
OUT_DIR=out

---

Output of LD_TRACE_LOADED_OBJECTS=1 ld libCommonApi.so on the host/linux machine.

    linux-vdso.so.1 =>  (0x00007fffabde1000)
libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2 (0x00007f084f9df000)
libz.so.1 => /lib/x86_64-linux-gnu/libz.so.1 (0x00007f084f7c8000)
libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007f084f4cc000)
libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f084f10e000)
/lib64/ld-linux-x86-64.so.2 (0x00007f084fbe3000)

[uberspot]

Fixed by pushing the generated libc.so to /system/lib since the local android tree and the tree on the device were diverging. Added relevant documentation in open-tee.github.io.