set path = (/home/whaley/local/gcc-4.2.1/bin $path) setenv LD_LIBRARY_PATH /home/whaley/local/gcc-4.2.1/lib64:/home/whaley/local/gcc-4.2.1/lib
I source the C shell startup file, and then check that I'm now getting the
etl-opt8>source ~/.cshrc etl-opt8>gcc -v Using built-in specs. Target: x86_64-unknown-linux-gnu Configured with: ../configure --prefix=/home/whaley/local/gcc-4.2.1 --enable-languages=c Thread model: posix gcc version 4.2.1
Now, I don't need to pass a lot of flags to set what compiler to use, since ATLAS will find gcc 4.2 as the first compiler, and it will have the libraries it needs to work. However, I want to build dynamic libraries for this install, so I know I'll need to add the -shared configure flag; config will automatically add the required -fPIC flag to all gnu compilers so they can build shared object code.
Now, I do a top on etl-opt8 (the machine name) and see that I'm alone on the machine. Therefore, I will want to use the cycle-accurate x86-specific wall timer in order to improve the accuracy of my install. This requires me to figure out what the Mhz of my machine is. Under Linux, I can discover this with cat /proc/cpuinfo, which tells me cpu MHz : 2100.000. Therefore, I will throw -D c -DPentiumCPS=2100.
I want ATLAS to install the resulting libraries and header files in
/home/whaley/local/atlas, so I'll pass -prefix=/home/whaley/local/atlas as well.
I want a 64 bit install, and to build a full LAPACK library, so I will also
want to throw -b 64 and
<990>>R. Clint Whaley 2016-07-28