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ccopts.sh
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ccopts.sh
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#!/bin/sh
#
# returns the CFLAGS for the given compiler (maximum optimizations)
#
ARCH=`uname -m |sed -e s/i.86/i386/ -e s/sun4u/sparc64/ `
# gcc 3.x optimize for:
x86CPU=athlon
WARN_ARCH="WARNING: Not tested on architecture $ARCH, using default flags"
if [ $# -lt 1 ]
then
echo "ERROR: you must specify the compiler name" 1>&2
exit 1
fi
if [ "$1" = "-h" ]
then
echo "Usage: "
echo " $0 compiler_name"
exit 1
fi
if CCVER=`./ccver.sh $1`
then
NAME=`echo "$CCVER"|cut -d" " -f 1`
VER=`echo "$CCVER"|cut -d" " -f 2`
MAJOR_VER=`echo "$CCVER"|cut -d" " -f 3`
else
echo "ERROR executing ./ccver.sh" 2>&1
exit 1
fi
echo "name=$NAME, ver=$VER, mver=$MAJOR_VER"
case $NAME
in
gcc)
#common stuff
CFLAGS="-O9 -funroll-loops -Winline -Wall"
case $MAJOR_VER
in
3)
case $ARCH
in
i386)
CFLAGS="$CFLAGS -minline-all-stringops -malign-double"
CFLAGS="$CFLAGS -falign-loops -march=$x86CPU"
;;
sparc64)
CFLAGS="$CFLAGS -mcpu=ultrasparc -mtune=ultrasparc"
CFLAGS="$CFLAGS -m32"
#other interesting options:
# -mcpu=v9 or ultrasparc? # -mtune implied by -mcpu
#-mno-epilogue #try to inline function exit code
#-mflat # omit save/restore
#-faster-structs #faster non Sparc ABI structure copy
;;
armv4l)
CFLAGS="$CFLAGS -mcpu=strongarm1100"
;;
*)
echo "$WARN_ARCH" 1>&2
;;
esac
;;
2|*)
case $ARCH
in
i386)
CFLAGS="$CFLAGS -m486 -malign-loops=4"
;;
sparc64)
CFLAGS="$CFLAGS -mv8 -Wa,-xarch=v8plus"
;;
armv4l)
;;
*)
echo "$WARN_ARCH" 1>&2
;;
esac
;;
esac
;;
icc)
CFLAGS="-O3 -ipo -ipo_obj -unroll"
case $ARCH
in
i386)
CFLAGS="$CFLAGS -tpp6 -xK"
#-openmp #optimize for PIII
# -prefetch doesn't seem to work
#( ty to inline acroos files, unroll loops,prefetch,
# optimize for PIII, use PIII instructions & vect.,
# mutlithread loops)
;;
*)
echo "$WARN_ARCH" 1>&2
;;
esac
;;
suncc)
CFLAGS="-xO5 -fast -native -xCC -xc99"
case $ARCH
in
sparc64)
CFLAGS="$CFLAGS -xarch=v8plusa"
;;
*)
echo "$WARN_ARCH" 1>&2
;;
esac
;;
*)
echo "WARNING: unknown compiler $NAME, trying _very_ generic flags" 1>&2
CFLAGS="-O2"
esac
echo "CFLAGS=$CFLAGS"