diff -uNr ncbi.original/platform/linux-x86.ncbi.mk ncbi/platform/linux-x86.ncbi.mk
--- ncbi.original/platform/linux-x86.ncbi.mk	2004-01-09 13:47:22.000000000 -0500
+++ ncbi/platform/linux-x86.ncbi.mk	2004-02-02 23:33:14.000000000 -0500
@@ -11,8 +11,8 @@
 NCBI_AR=ar
 NCBI_CC = gcc -pipe -D_FILE_OFFSET_BITS=64 -D_LARGEFILE64_SOURCE
 NCBI_CFLAGS1 = -c
-NCBI_LDFLAGS1 = -O3 -mcpu=pentiumpro
-NCBI_OPTFLAG = -O3 -mcpu=pentiumpro
+NCBI_LDFLAGS1 = -O3 -mcpu=pentium4 -march=pentium4 -msse2 -fprefetch-loop-arrays
+NCBI_OPTFLAG = -O3  -mcpu=pentium4 -march=pentium4 -msse2 -fprefetch-loop-arrays
 NCBI_BIN_MASTER = /home/coremake/ncbi/bin
 NCBI_BIN_COPY = /home/coremake/ncbi/bin
 NCBI_INCDIR = /home/coremake/ncbi/include