#!/usr/bin/env bash

SRC_DIR=$1
BUILD_DIR=$2

if [ ! -e "$SRC_DIR/gcc/rtl.def" ]
then
    echo "`$SRC_DIR' is not top directory of gcc source code"
    exit 1
fi

if [ ! -e "$BUILD_DIR/gcc/gtype-desc.h" ]
then
    echo "`$BUILD_DIR' is not top directory of gcc build"
    exit 1
fi

pushd "$SRC_DIR"

etags -o TAGS-RTL-DEF.sub --language=none --regex='/DEF_RTL_EXPR(\([A-Z_]+\),/\1/' gcc/rtl.def
INCLUDE_ETAGS_FILES="$INCLUDE_ETAGS_FILES --include $PWD/TAGS-RTL-DEF.sub"

for d in gcc include/ libiberty/ gcc/config/arm gcc/c-family/ gcc/lto/ gcc/cp/
do
    pushd "$d"
    etags --no-members -o TAGS.sub *.[hc]
    INCLUDE_ETAGS_FILES="$INCLUDE_ETAGS_FILES --include $PWD/TAGS.sub"
    popd
done

popd


pushd "$BUILD_DIR"

etags --no-members -o TAGS.sub gcc/*.[hc]
INCLUDE_ETAGS_FILES="$INCLUDE_ETAGS_FILES --include $PWD/TAGS.sub"

if [ -n "$INCLUDE_ETAGS_FILES" ]
then
    etags $INCLUDE_ETAGS_FILES
fi

popd