build_config

#!/bin/sh
# Copyright 2015 The libcount Authors.
#
# 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. See the AUTHORS file for names of
# contributors.

# Detects the operating system we're compiling on and outputs a file 
# specified by the first argument, which in turn gets read while 
# processing the Makefile.

OUTPUT=$1
PREFIX=$2

# Ensure that the correct arguments were passed
if test -z "$OUTPUT" || test -z "$PREFIX"; then
  echo "usage: $0 <output-filename> <directory-prefix>" >&2
  exit 1
fi

# Delete existing output, if it exists
rm -f $OUTPUT
touch $OUTPUT

# Test for existence of the $CXX variable; if it hasn't been defined,
# default to use g++.
if test -z "$CXX"; then
  CXX=g++
fi

# Same as above for CC
if test -z "$CC"; then
  CC=gcc
fi

# Test to see if the caller specified a lint tool; if not, we'll 
# attempt to default to cpplint.py, but if that isn't present on
# the system, we'll use 'fakelint', a do-nothing stub that lives
# in the scripts/ subdirectory.
if test -z "$LINT_TOOL"; then
  CPPLINT_PY=`which cpplint.py`
  if test -z "$CPPLINT_PY"; then
    LINT_TOOL=./scripts/fakelint.sh
  else
    LINT_TOOL="cpplint.py"
  fi
fi

# Detect target OS
if test -z "$TARGET_OS"; then
  TARGET_OS=`uname -s`
fi

# We may have platform-specific CXX flags
PLATFORM_CXXFLAGS=""

# MacOSX doesn't seem to ship with openssl-devel, so to build the demo
# program, the library will have to be built from source. The default
# install prefix puts the headers in /usr/local/ssl/include, so add
# this to the include path if that directory exists.
if [ -d "/usr/local/ssl" ]; then
  PLATFORM_CXXFLAGS+=" -I/usr/local/ssl/include "
fi

# Determine OS-specifics
case "$TARGET_OS" in
  Darwin)
    PLATFORM=OS_MACOSX
    ;;
  Linux)
    PLATFORM=OS_LINUX
    ;;
  *)
    PLATFORM=OS_GENERIC_UNIX
    ;;
esac

# Source files live in the 'count' subdirectory.
COUNT_DIR="$PREFIX/count"

set -f # Disable globbing temporarily so that our patterns aren't expanded
PRUNE_TEST="-name *test*.cc -prune"
COUNT_FILES=`find $COUNT_DIR $PRUNE_TEST -o -name '*.cc' \
  -print | sort | sed "s,^$PREFIX/,," | tr "\n" " "`
set +f # Re-enable globbing

# Build comprehensive list of files for cpplint

LINT_INCLUDE=`find $PREFIX/include/count -name '*.h' \
  -print | sort | sed "s,^$PREFIX/,," | tr "\n" " "`

LINT_COUNT=`find $PREFIX/count -name '*.cc' \
  -print | sort | sed "s,^$PREFIX/,," | tr "\n" " "`

LINT_EXAMPLES=`find $PREFIX/examples -name '*.cc' \
  -print | sort | sed "s,^$PREFIX/,," | tr "\n" " "`

CPPLINT_SOURCES="$LINT_INCLUDE $LINT_COUNT $LINT_EXAMPLES "

# Emit configuration variables
echo "COUNT_FILES=$COUNT_FILES" >> $OUTPUT
echo "CPPLINT_SOURCES=$CPPLINT_SOURCES" >> $OUTPUT
echo "CC=$CC" >> $OUTPUT
echo "CXX=$CXX" >> $OUTPUT
echo "LINT_TOOL=$LINT_TOOL" >> $OUTPUT
echo "PLATFORM=$PLATFORM" >> $OUTPUT
echo "PLATFORM_CXXFLAGS=$PLATFORM_CXXFLAGS" >> $OUTPUT