issue detected on Buildroot, with `r2p4`
```
make[2]: Entering directory `/home/buildroot/build/instance-0/output/build/sunxi-mali-d343311efc8db166d8371b28494f0f27b6a58724/test'
/home/buildroot/build/instance-0/output/host/usr/bin/armv5-ctng-linux-gnueabi-gcc -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -Os -lm -ldl -lpthread -o test test.c -lEGL -lGLESv2
/home/buildroot/build/instance-0/output/host/opt/ext-toolchain/bin/../lib/gcc/armv5-ctng-linux-gnueabi/4.8.3/../../../../armv5-ctng-linux-gnueabi/bin/ld: warning: libUMP.so.2, needed by /home/buildroot/build/instance-0/output/host/usr/arm-buildroot-linux-gnueabi/sysroot/usr/lib/libMali.so, not found (try using -rpath or -rpath-link)
/home/buildroot/build/instance-0/output/host/usr/arm-buildroot-linux-gnueabi/sysroot/usr/lib/libEGL.so: undefined reference to `ump_close'
/home/buildroot/build/instance-0/output/host/usr/arm-buildroot-linux-gnueabi/sysroot/usr/lib/libEGL.so: undefined reference to `ump_mapped_pointer_get'
/home/buildroot/build/instance-0/output/host/usr/arm-buildroot-linux-gnueabi/sysroot/usr/lib/libEGL.so: undefined reference to `ump_secure_id_get'
/home/buildroot/build/instance-0/output/host/usr/arm-buildroot-linux-gnueabi/sysroot/usr/lib/libEGL.so: undefined reference to `ump_mapped_pointer_release'
/home/buildroot/build/instance-0/output/host/usr/arm-buildroot-linux-gnueabi/sysroot/usr/lib/libMali.so: undefined reference to `ump_reference_add'
/home/buildroot/build/instance-0/output/host/usr/arm-buildroot-linux-gnueabi/sysroot/usr/lib/libMali.so: undefined reference to `ump_size_get'
/home/buildroot/build/instance-0/output/host/usr/arm-buildroot-linux-gnueabi/sysroot/usr/lib/libEGL.so: undefined reference to `ump_reference_release'
/home/buildroot/build/instance-0/output/host/usr/arm-buildroot-linux-gnueabi/sysroot/usr/lib/libEGL.so: undefined reference to `ump_open'
collect2: error: ld returned 1 exit status
```