install yael on the ubuntu 12.04

1.?bits/predefs.h no such file or directory ????

　　　　sudo apt-get install?gcc-multilib

2. sudo gedit /etc/profile ? PATH=$PATH:/usr/local/MATLAB/R2012a/bin?

? ? source /etc/profile

3.ubuntu 切換gcc 版本

? ? ?1）sudo apt-get install?gcc-4.4 g++-4.4 g++-4.4-multilib gcc-4.4-multilib

? ? ?2）

root@ubuntu:~# ls /usr/bin/gcc* -l
lrwxrwxrwx 1 root root 21 Sep 18 04:42 /usr/bin/gcc -> /etc/alternatives/gcc
-rwxr-xr-x 1 root root 224544 Apr 15 22:58 /usr/bin/gcc-4.4
-rwxr-xr-x 1 root root 306200 Apr 15 19:45 /usr/bin/gcc-4.6
root@ubuntu:~#update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-4.4 50
root@ubuntu:~#update-alternatives --install /usr/bin/g++ gcc /usr/bin/g++-4.4 50

sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-4.6 100

sudo update-alternatives --install /usr/bin/g++ g++ /usr/bin/g++-4.6 100

? ?3 ) sudo update-alternatives --config gcc

? ? ? ? ?sudo update-alternatives --config g++ ? ?

? ? to choose the gcc and g++ current version that you need

4. lsb_release -a ? 查看系統的版本號

5. uname -a 　　 ??查看系統是32位還是64位

6.?/usr/bin/ld: i386:x86-64 architecture of input file `yael4matlab.a(kmeans.o)' is incompatible with i386 output

　　-m32 ?與 -m64之間的問題，需要根據自己platform的實際情況進行配置

7. install LAPACK and BLAS

? ? 1) sudo apt-get install liblapack-dev

? ? 2) download from the link?http://www.netlib.org/blas/blas.tgz

? ? ? ??

　　$ cd $CLASSHG/codes/lapack$ tar -zxf blas.tgz    # creates BLAS subdirectory$ cd BLAS$ gfortran -O3 -c *.f$ ar cr libblas.a *.o  # creates libblas.a       

  reference http://faculty.washington.edu/rjl/uwamath583s11/sphinx/_build/html/lapack_install.html

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