Clang unable to cross-compile from x86_64 to ARM, Cortex a9

clang-cross-compiler-error-arm7a

$ clang -v -target arm-none-eabi -mcpu=cortex-a9 -mfloat-abi=soft helloworld.c 
clang version 3.3 (tags/RELEASE_33/rc3)
Target: arm-none--eabi
Thread model: posix
 "/usr/bin/clang" -cc1 -triple armv7-none--eabi -S -disable-free -disable-llvm-verifier -main-file-name helloworld.c -mrelocation-model static -mdisable-fp-elim -fmath-errno -mconstructor-aliases -target-abi aapcs -target-cpu cortex-a9 -msoft-float -mfloat-abi soft -target-feature +soft-float -target-feature +soft-float-abi -target-feature -neon -target-linker-version 2.23.52.0.1 -v -resource-dir /usr/bin/../lib/clang/3.3 -fno-dwarf-directory-asm -fdebug-compilation-dir /home/rob/code/c/llvm -ferror-limit 19 -fmessage-length 157 -mstackrealign -fno-signed-char -fobjc-runtime=gcc -fobjc-default-synthesize-properties -fdiagnostics-show-option -fcolor-diagnostics -backend-option -vectorize-loops -o /tmp/helloworld-Iarp5R.s -x c helloworld.c
clang -cc1 version 3.3 based upon LLVM 3.3 default target x86_64-redhat-linux-gnu
#include "..." search starts here:
#include <...> search starts here:
 /usr/local/include
 /usr/bin/../lib/clang/3.3/include
 /usr/include
 /usr/lib/gcc/x86_64-redhat-linux/4.8.2/include
End of search list.
 "/usr/bin/arm-none-eabi-gcc" -v -mcpu=cortex-a9 -mfloat-abi=soft -c -o /tmp/helloworld-2n4ZGp.o -x assembler /tmp/helloworld-Iarp5R.s
Using built-in specs.
COLLECT_GCC=/usr/bin/arm-none-eabi-gcc
Target: arm-none-eabi
Configured with: ../gcc-4.7-2012.09/configure --prefix=/usr --mandir=/usr/share/man --libdir=/usr/lib64 --with-pkgversion='Fedora 2012.09.63-1.fc19' --with-bugurl=https://bugzilla.redhat.com/ --enable-lto --infodir=/usr/share/info --target=arm-none-eabi --enable-interwork --enable-multilib --with-newlib --enable-languages=c --disable-nls --disable-shared --disable-threads --with-gnu-as --with-gnu-ld --with-gmp --with-mpfr --with-mpc --without-headers --with-system-zlib --disable-libssp
Thread model: single
gcc version 4.7.2 (Fedora 2012.09.63-1.fc19) 
COLLECT_GCC_OPTIONS='-v' '-mcpu=cortex-a9' '-mfloat-abi=soft' '-c' '-o' '/tmp/helloworld-2n4ZGp.o'
 /usr/lib64/gcc/arm-none-eabi/4.7.2/../../../../arm-none-eabi/bin/as -v -mcpu=cortex-a9 -mfloat-abi=soft -meabi=5 -o /tmp/helloworld-2n4ZGp.o /tmp/helloworld-Iarp5R.s
GNU assembler version 2.23.51 (arm-none-eabi) using BFD version (Fedora 2012.09.63-3.fc19) 2.23.51.20120829
COMPILER_PATH=/usr/libexec/gcc/arm-none-eabi/4.7.2/:/usr/libexec/gcc/arm-none-eabi/4.7.2/:/usr/libexec/gcc/arm-none-eabi/:/usr/lib64/gcc/arm-none-eabi/4.7.2/:/usr/lib64/gcc/arm-none-eabi/:/usr/lib64/gcc/arm-none-eabi/4.7.2/../../../../arm-none-eabi/bin/
LIBRARY_PATH=/usr/lib64/gcc/arm-none-eabi/4.7.2/:/usr/lib64/gcc/arm-none-eabi/4.7.2/../../../../arm-none-eabi/lib/
COLLECT_GCC_OPTIONS='-v' '-mcpu=cortex-a9' '-mfloat-abi=soft' '-c' '-o' '/tmp/helloworld-2n4ZGp.o'
 "/usr/bin/arm-none-eabi-gcc" -v -mcpu=cortex-a9 -mfloat-abi=soft -o a.out /tmp/helloworld-2n4ZGp.o
Using built-in specs.
COLLECT_GCC=/usr/bin/arm-none-eabi-gcc
COLLECT_LTO_WRAPPER=/usr/libexec/gcc/arm-none-eabi/4.7.2/lto-wrapper
Target: arm-none-eabi
Configured with: ../gcc-4.7-2012.09/configure --prefix=/usr --mandir=/usr/share/man --libdir=/usr/lib64 --with-pkgversion='Fedora 2012.09.63-1.fc19' --with-bugurl=https://bugzilla.redhat.com/ --enable-lto --infodir=/usr/share/info --target=arm-none-eabi --enable-interwork --enable-multilib --with-newlib --enable-languages=c --disable-nls --disable-shared --disable-threads --with-gnu-as --with-gnu-ld --with-gmp --with-mpfr --with-mpc --without-headers --with-system-zlib --disable-libssp
Thread model: single
gcc version 4.7.2 (Fedora 2012.09.63-1.fc19) 
COMPILER_PATH=/usr/libexec/gcc/arm-none-eabi/4.7.2/:/usr/libexec/gcc/arm-none-eabi/4.7.2/:/usr/libexec/gcc/arm-none-eabi/:/usr/lib64/gcc/arm-none-eabi/4.7.2/:/usr/lib64/gcc/arm-none-eabi/:/usr/lib64/gcc/arm-none-eabi/4.7.2/../../../../arm-none-eabi/bin/
LIBRARY_PATH=/usr/lib64/gcc/arm-none-eabi/4.7.2/:/usr/lib64/gcc/arm-none-eabi/4.7.2/../../../../arm-none-eabi/lib/
COLLECT_GCC_OPTIONS='-v' '-mcpu=cortex-a9' '-mfloat-abi=soft' '-o' 'a.out'
arm-none-eabi-gcc: fatal error: selected multilib '.' not installed
compilation terminated.
clang: error: linker (via gcc) command failed with exit code 1 (use -v to see invocation)