From: Emanuele O. <oli...@it...> - 2006-09-28 08:18:26
|
Hi, I'm installing numpy on a 2 cpus intel pentium 4 Linux box. I'm installing BLAS and LAPACK from sources too and I need to tune compiler flags. Here is the question: which are the proper flags for compiling LAPACK? Inside lapack.tgz make.inc.LINUX says: OPTS = -funroll-all-loops -fno-f2c -O3 instead on scipy.org[0] it's suggested: OPTS = -O2 I assume that using -O3 and unrolling loops should have definitely better performance that just -O2 but I'm wondering if the speedy options can be a problem for current numpy release (numpy-1.0rc1). Is it safe to use '-funroll-all-loops -fno-f2c -O3'? Thanks in advance for answers, Emanuele [0]: http://scipy.org/Installing_SciPy P.S.: my GCC is v3.4.5 |