Verbose Makefile error

output

$ make mex
gcc-4.7 -v -O3 -fPIC -pthread -Wall -Werror -ansi -ffast-math -fomit-frame-pointer -I \
	-I/home/amodig/MATLAB/R2014a/extern/include -o matlabscalar.o -c matlabscalar.cpp
Using built-in specs.
COLLECT_GCC=gcc-4.7
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu/Linaro 4.7.3-2ubuntu1~12.04' --with-bugurl=file:///usr/share/doc/gcc-4.7/README.Bugs --enable-languages=c,c++,go,fortran,objc,obj-c++ --prefix=/usr --program-suffix=-4.7 --enable-shared --enable-linker-build-id --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --with-gxx-include-dir=/usr/include/c++/4.7 --libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --enable-gnu-unique-object --enable-plugin --with-system-zlib --enable-objc-gc --enable-multiarch --disable-werror --with-arch-32=i686 --with-abi=m64 --with-multilib-list=m32,m64 --with-tune=generic --enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=x86_64-linux-gnu
Thread model: posix
gcc version 4.7.3 (Ubuntu/Linaro 4.7.3-2ubuntu1~12.04) 
COLLECT_GCC_OPTIONS='-v' '-O3' '-fPIC' '-pthread' '-Wall' '-Werror' '-ansi' '-ffast-math' '-fomit-frame-pointer' '-I' '-I/home/amodig/MATLAB/R2014a/extern/include' '-o' 'matlabscalar.o' '-c' '-mtune=generic' '-march=x86-64'
 /usr/lib/gcc/x86_64-linux-gnu/4.7/cc1plus -quiet -v -I -I/home/amodig/MATLAB/R2014a/extern/include -imultilib . -imultiarch x86_64-linux-gnu -D_GNU_SOURCE -D_REENTRANT matlabscalar.cpp -quiet -dumpbase matlabscalar.cpp -mtune=generic -march=x86-64 -auxbase-strip matlabscalar.o -O3 -Wall -Werror -ansi -version -fPIC -ffast-math -fomit-frame-pointer -fstack-protector -o /tmp/user/1088507/ccJW6BXW.s
GNU C++ (Ubuntu/Linaro 4.7.3-2ubuntu1~12.04) version 4.7.3 (x86_64-linux-gnu)
	compiled by GNU C version 4.7.3, GMP version 5.0.2, MPFR version 3.1.0-p3, MPC version 0.9
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
ignoring duplicate directory "/usr/include/x86_64-linux-gnu/c++/4.7"
ignoring nonexistent directory "/usr/local/include/x86_64-linux-gnu"
ignoring nonexistent directory "/usr/lib/gcc/x86_64-linux-gnu/4.7/../../../../x86_64-linux-gnu/include"
ignoring nonexistent directory "-I/home/amodig/MATLAB/R2014a/extern/include"
#include "..." search starts here:
#include <...> search starts here:
 /usr/include/c++/4.7
 /usr/include/x86_64-linux-gnu/c++/4.7/.
 /usr/include/c++/4.7/backward
 /usr/lib/gcc/x86_64-linux-gnu/4.7/include
 /usr/local/include
 /usr/lib/gcc/x86_64-linux-gnu/4.7/include-fixed
 /usr/include/x86_64-linux-gnu
 /usr/include
End of search list.
GNU C++ (Ubuntu/Linaro 4.7.3-2ubuntu1~12.04) version 4.7.3 (x86_64-linux-gnu)
	compiled by GNU C version 4.7.3, GMP version 5.0.2, MPFR version 3.1.0-p3, MPC version 0.9
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: 954dbe58d35e0c0155e3c4a809b2eccb
In file included from matlabscalar.cpp:1:0:
matlabscalar.h:4:17: fatal error: mex.h: No such file or directory
compilation terminated.
make: *** [matlabscalar.o] Error 1