Problems with a build

Hello to all.
I am trying to construct to one dll through source code of the SDL-1.2.8 but I do not obtain, I am using the MSYS and it configures it is this:
./configure – prefix=c:/dev-cpp – disable-static “CFLAGS=-O3 - fomit-frame-pointer - march=i386”

But when use nasm lib is very slow, without the use of nasm (- -  disable-nasm) it compels in correct way but she is slow excessively and  the same version of lib (SDL-1.2.8) that I caught here is well faster.  What I must make so that the SDL-1.2.8 can use nasm to be faster? 
thanks for help.---------------------------------

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