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#!/bin/sh
greparch() {
$CC -march=native -dM -E - </dev/null 2>/dev/null | grep "$1"
}
grepsan() {
$CC -fsanitize="$1" -dM -E -x c - </dev/null 2>/dev/null | grep "SANITIZE"
}
detectthreads() {
echo 16 # TODO: choose based on system
}
detectarch() {
[ -n "$(greparch __AVX2__)" ] && detected="AVX2"
[ -n "$(greparch __ARM_NEON)" ] && detected="NEON"
[ -z "$detected" ] && detected="PORTABLE"
echo "$detected"
}
validatecc() {
if ! (which "$CC" >/dev/null 2>&1) ; then
echo "Error: compiler '$CC' not found"
exit 1
fi
}
validatethreads() {
if [ "$THREADS" -le 0 ] || [ "$THREADS" -gt 128 ]; then
echo "Error: number of threads must be between 1 and 128"
exit 1
fi
}
validatearch() {
case "$ARCH" in
AVX2|NEON|PORTABLE)
;;
*)
echo "Error: architecture '$ARCH' not supported"
exit 1
;;
esac
}
CC=${CC:-cc}
THREADS=${THREADS-"$(detectthreads)"}
ARCH=${ARCH-"$(detectarch)"}
validatecc
validatethreads
validatearch
STD="-std=c99"
WFLAGS="-pedantic -Wall -Wextra"
WNOFLAGS="-Wno-unused-parameter -Wno-unused-function -Wno-unknown-pragmas"
[ "$ARCH" = "AVX2" ] && AVX="-mavx2"
[ -n "$(grepsan address)" ] && ADDR="-fsanitize=address"
[ -n "$(grepsan undefined)" ] && UNDEF="-fsanitize=undefined"
SAN="$ADDR $UNDEF"
LIBS="-lpthread"
CFLAGS="$STD $LIBS $WFLAGS $WNOFLAGS $AVX -O3"
DBGFLAGS="$STD $LIBS $WFLAGS $WNOFLAGS $SAN $AVX -g3 -DDEBUG"
MACROS="-DTHREADS=$THREADS -D$ARCH"
echo "Selected architecture: $ARCH"
echo "Number of threads: $THREADS"
echo "Compiler: $CC"
{
echo "ARCH = $ARCH";
echo "";
echo "CFLAGS = $CFLAGS";
echo "DBGFLAGS = $DBGFLAGS";
echo "MACROS = $MACROS"
echo "";
echo "CC = $CC"
} > config.mk
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