gen-cdefdb

#!/bin/sh

# Copyright (C) 2014-2015 Brian Downing.  MIT License.

set -e

lj_cdefdb_dir=${LJ_CDEFDB_DIR:-$(luajit -e "print(require('cdefdb.config').dir)")}

usage() {
    echo "Usage: $0 [options] (file.c|-) -- <cc args...>" >&2
    echo "  -o DIR, --output-dir=DIR    set output directory" >&2
    echo "                              (default 'lj-cdefdb-out')" >&2
    echo "  -p PRIO, --priority=PRIO    set priority for generated database" >&2
    echo "                              (default 0)" >&2
    exit $1
}

OPTS=$(getopt -o ho:p: -l help,output-dir:,priority: -n "$0" -- "$@")
eval set -- "$OPTS"

out=lj-cdefdb-out
prio=0
while true; do
    case "$1" in
        -h|--help) usage 0; shift;;
        -o|--output-dir) out=$2; shift 2;;
        -p|--priority) prio=$2; shift 2;;
        --) shift; break;;
        *) echo "Option parse error!"; exit 1;;
    esac
done

if [ -z "$1" ]; then
    echo "$0: No input file specified" >&2
    echo "Try '$0 --help' for more information." >&2
    exit 1
fi

file="$1"; shift
. "$lj_cdefdb_dir"/functions.sh

out=$(readlink -f "$out")

pp_tmpdir="/tmp/lj-cdefdb-$$"
mkdir -p "$pp_tmpdir"
trap "rm -rf $pp_tmpdir" 0
pp_output="$pp_tmpdir/preprocessed$$.c"
${CC:-cc} -E -dD "$@" "$file" > "$pp_output"

hash=$(sha1sum "$pp_output" | cut -b1-8)

mkdir -p "$out"
run_in_ljclang ../gen-cdefdb.lua "$pp_output" "$out" "$hash" "$prio"

mkdir -p "$out"/cdefdb.d
mv "$out"/"$hash".db "$out"/cdefdb.d
if [ -e "$out"/"$hash".c ]; then
    mkdir -p "$out"/stubs
    ${CC:-cc} -fPIC -shared -O2 -o "$out"/stubs/"$hash".so "$out"/"$hash".c
    rm "$out"/"$hash".c
fi