#!/bin/sh
# Copyright 2008 Google Inc.
# 
# Licensed under the Apache License, Version 2.0 (the "License"); you may not
# use this file except in compliance with the License. You may obtain a copy of
# the License at
# 
# http://www.apache.org/licenses/LICENSE-2.0
# 
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations under
# the License.

# this verifies that debug code is elided if it is not needed

# The C++ compiler is specified in CXX, and its flags in CXXFLAGS
# Defaults for GCC are used if not supplied.  Note that CXXFLAGS should
# include optimizations intended to be used.  It is assumed that the
# compiler uses -S to produce assembly output and -o - works to get that
# output on stdout, and -Dsym=val is used to define preprocessor symbols.
#
# Note that debugging symbols should not be included as generally the
# debugging info contains references to elided calls etc.
if [ "x$CXX" == "x" ]
then
  CXX=g++
fi

if [ "x$CXXFLAGS" == "x" ]
then
  CXXFLAGS=-O3
else
  # remove -g if supplied
  CXXFLAGS=`echo $CXXFLAGS | sed 's/-g\S*//'`
fi

CMD="$CXX $CXXFLAGS -S -o -"

err=0
$CMD -DGWT_DEBUGDISABLE DebugTest.cpp | egrep '(GarbalDeGook|ExpensiveCall)' >/dev/null
if [ $? -eq 0 ]
then
  echo "Debug disabled leaves debug code around"
  err=1
fi
$CMD -DGWT_DEBUGLEVEL=Error DebugTest.cpp | egrep '(Warning|ExpensiveCall)' >/dev/null
if [ $? -eq 0 ]
then
  echo "Debug level Error leaves lower-level debug code around"
  err=1
fi
$CMD -DGWT_DEBUGLEVEL=Spam DebugTest.cpp | grep 'ExpensiveCall' >/dev/null
if [ $? -eq 1 ]
then
  echo "Debug level Spam does not include code that should be included"
  err=1
fi

exit $err