qconf

#!/bin/sh -e
topdir="${0%/*}"
if [ "$topdir" = "$0" ]; then
	topdir=.
fi
abstopdir=$(readlink -f "$topdir")
if [ ! -e "${topdir}/configure" ]; then
	cd "$topdir"
	autoreconf -fi
	cd -
fi
case "$(uname -s)" in
OpenBSD)
	set -x
	"$topdir/configure" --sysconfdir=/etc --prefix=/usr/local --localstatedir=/var \
		CFLAGS="-O0 -g" CXXFLAGS="-O0 -g" "$@"
	set +x
	ncpus=$(sysctl hw.ncpuonline 2>/dev/zero | cut -b15-)
	;;
*)
	echo -en '#include <libHX/string.h>\nint main(void) { HXmc_free(NULL); }' >conftest.c
	libdir=""
	if gcc -o conftest conftest.c $(pkg-config --cflags --libs libHX) >/dev/null 2>/dev/null; then
		libdir=$(ldd conftest 2>/dev/null | perl -lne 'if(m{(\S+)/libc.so.}){print$1;exit}')
		if [ -n "$libdir" ]; then
			libdir="--libdir=$libdir"
			echo """qconf: Adding $libdir"""
		fi
	fi
	set -x
	"$topdir/configure" --sysconfdir=/etc --localstatedir=/var $libdir \
		CFLAGS="-O0 -g" CXXFLAGS="-O0 -g" "$@"
	set +x
	ncpus=$(lscpu -b --parse=cpu 2>/dev/null | grep -Ec '[0-9]' || :)
	;;
esac
if [ "$ncpus" != "0" ]; then
	ncpus=" -j$ncpus"
else
	ncpus=""
fi
echo """Run \`make$ncpus\` now. The just-built programs, e.g. \`./http\` can be put to use without \`make install\`."""