If you look through the full output below you'll see that a leading '/' appears to be missing for the #include search paths.

GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
ignoring nonexistent directory "usr/include/c++/"
ignoring nonexistent directory "usr/include/c++//aarch64-oe-linux"
ignoring nonexistent directory "usr/include/c++//backward"
ignoring nonexistent directory "/usr/local/include"
ignoring nonexistent directory "/usr/lib/gcc/aarch64-oe-linux/4.8.2/../../../../aarch64-oe-linux/include"

--------------------------------------------------------
Here's the full output from: 

$ g++ -v -c hello.cc

Using built-in specs.
COLLECT_GCC=g++
Target: aarch64-oe-linux
Configured with: /scratch/java-benchmark/jenkins-setup/build/tmp-eglibc/work-shared/gcc-linaro-4.8-r2013.06/gcc-linaro-4.8-2013.06/configure --build=x86_64-linux --host=aarch64-oe-linux --target=aarch64-oe-linux --prefix=/usr --exec_prefix=/usr --bindir=/usr/bin --sbindir=/usr/sbin --libexecdir=/usr/lib/gcc --datadir=/usr/share --sysconfdir=/etc --sharedstatedir=/com --localstatedir=/var --libdir=/usr/lib --includedir=/usr/include --oldincludedir=/usr/include --infodir=/usr/share/info --mandir=/usr/share/man --disable-silent-rules --disable-dependency-tracking --with-libtool-sysroot=/scratch/java-benchmark/jenkins-setup/build/tmp-eglibc/sysroots/genericarmv8 --with-gnu-ld --enable-shared --enable-languages=c,c++ --enable-threads=posix --enable-multilib --enable-c99 --enable-long-long --enable-symvers=gnu --enable-libstdcxx-pch --program-prefix=aarch64-oe-linux- --without-local-prefix --enable-target-optspace --enable-lto --enable-libssp --disable-bootstrap --disable-libmudflap --with-system-zlib --with-linker-hash-style=gnu --enable-linker-build-id --with-ppl=no --with-cloog=no --enable-checking=release --enable-cheaders=c_global --with-sysroot=/ --with-build-sysroot=/scratch/java-benchmark/jenkins-setup/build/tmp-eglibc/sysroots/genericarmv8 --with-native-system-header-dir=/scratch/java-benchmark/jenkins-setup/build/tmp-eglibc/sysroots/genericarmv8/usr/include --with-gxx-include-dir=/usr/include/c++/ --enable-dependency-tracking --enable-nls --enable-__cxa_atexit
Thread model: posix
gcc version 4.8.2 20130603 (prerelease) (Linaro GCC 4.8-2013.06-0~dev) 
COLLECT_GCC_OPTIONS='-v' '-c' '-shared-libgcc'
 /usr/lib/gcc/gcc/aarch64-oe-linux/4.8.2/cc1plus -quiet -v -D_GNU_SOURCE hello.cc -quiet -dumpbase hello.cc -auxbase hello -version -o /tmp/ccdaZdX4.s
GNU C++ (Linaro GCC 4.8-2013.06-0~dev) version 4.8.2 20130603 (prerelease) (aarch64-oe-linux)
	compiled by GNU C version 4.8.2 20130603 (prerelease), GMP version 5.1.1, MPFR version 3.1.2, MPC version 1.0.1
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
ignoring nonexistent directory "usr/include/c++/"
ignoring nonexistent directory "usr/include/c++//aarch64-oe-linux"
ignoring nonexistent directory "usr/include/c++//backward"
ignoring nonexistent directory "/usr/local/include"
ignoring nonexistent directory "/usr/lib/gcc/aarch64-oe-linux/4.8.2/../../../../aarch64-oe-linux/include"
#include "..." search starts here:
#include <...> search starts here:
 /usr/lib/gcc/aarch64-oe-linux/4.8.2/include
 /usr/lib/gcc/aarch64-oe-linux/4.8.2/include-fixed
 /usr/include
End of search list.
GNU C++ (Linaro GCC 4.8-2013.06-0~dev) version 4.8.2 20130603 (prerelease) (aarch64-oe-linux)
	compiled by GNU C version 4.8.2 20130603 (prerelease), GMP version 5.1.1, MPFR version 3.1.2, MPC version 1.0.1
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: c81ff8949a041ecebe2a0ccc70e0fc52
hello.cc:1:20: fatal error: iostream: No such file or directory
 #include <iostream>
                    ^
compilation terminated.

Note: trying to correct this leads to other errors:

root@genericarmv8:~# g++ -I/usr/include/c++ -c hello.cc
In file included from hello.cc:1:0:
/usr/include/c++/iostream:38:28: fatal error: bits/c++config.h: No such file or directory
 #include <bits/c++config.h>
                            ^
compilation terminated.