#!/bin/bash

# This file is part of BOINC.
# http://boinc.berkeley.edu
# Copyright (C) 2019 University of California
#
# BOINC is free software; you can redistribute it and/or modify it
# under the terms of the GNU Lesser General Public License
# as published by the Free Software Foundation,
# either version 3 of the License, or (at your option) any later version.
#
# BOINC is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
# See the GNU Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with BOINC.  If not, see <http://www.gnu.org/licenses/>.
#
#
# Script to build Macintosh 64-bit Intel library of c-ares for
# use in building BOINC.
#
# by Charlie Fenton 7/21/06
# Updated 10/18/11 for OS 10.7 Lion and XCode 4.2
# Updated 6/25/12 for c-ares 1.9.1
# Updated 7/10/12 for Xcode 4.3 and later which are not at a fixed address
# Updated 2/11/14 for c-ares 1.10.0
# Updated 9/2/14 for bulding c-ares as 64-bit binary
# Updated 9/10/16 for bulding c-ares 1.11.0
# Updated 1/25/18 for bulding c-ares 1.13.0 (updated comemnts only)
# Updated 2/22/18 to avoid APIs not available in earlier versions of OS X
# Updated 1/23/19 use libc++ instead of libstdc++ for Xcode 10 compatibility
#
## This script requires OS 10.8 or later
#
## After first installing Xcode, you must have opened Xcode and
## clicked the Install button on the dialog which appears to
## complete the Xcode installation before running this script.
#
## Where x.xx.x is the c-ares version number:
## In Terminal, CD to the c-ares-x.xx.x directory.
##     cd [path]/c-ares-x.xx.x/
## then run this script:
##     source [path]/buildc-ares.sh [ -clean ] [--prefix PATH]
##
## the -clean argument will force a full rebuild.
## if --prefix is given as absolute path the library is installed into there
## use -q or --quiet to redirect build output to /dev/null instead of /dev/stdout
##

doclean=""
stdout_target="/dev/stdout"
lprefix="/tmp/installed-c-ares"
libPath=".libs"
while [[ $# -gt 0 ]]; do
    key="$1"
    case $key in
        -clean|--clean)
        doclean="yes"
        ;;
        -prefix|--prefix)
        lprefix="$2"
        libPath="${lprefix}/lib"
        shift
        ;;
        -q|--quiet)
        stdout_target="/dev/null"
        ;;
    esac
    shift # past argument or value
done

if [ "${doclean}" != "yes" ]; then
    if [ -f "${libPath}/libcares.a" ]; then
        cwd=$(pwd)
        dirname=${cwd##*/}
        echo "${dirname} already built"
        return 0
    fi
fi

GCCPATH=`xcrun -find gcc`
if [ $? -ne 0 ]; then
    echo "ERROR: can't find gcc compiler"
    return 1
fi

GPPPATH=`xcrun -find g++`
if [ $? -ne 0 ]; then
    echo "ERROR: can't find g++ compiler"
    return 1
fi

MAKEPATH=`xcrun -find make`
if [ $? -ne 0 ]; then
    echo "ERROR: can't find make tool"
    return 1
fi

TOOLSPATH1=${MAKEPATH%/make}

ARPATH=`xcrun -find ar`
if [ $? -ne 0 ]; then
    echo "ERROR: can't find ar tool"
    return 1
fi

TOOLSPATH2=${ARPATH%/ar}

export PATH="${TOOLSPATH1}":"${TOOLSPATH2}":/usr/local/bin:$PATH

SDKPATH=`xcodebuild -version -sdk macosx Path`

if [ -d "${libPath}" ]; then
    rm -f "${libPath}/libcares.a"
    if [ $? -ne 0 ]; then return 1; fi
fi

export CC="${GCCPATH}";export CXX="${GPPPATH}"
export CPPFLAGS=""
export LDFLAGS="-Wl,-syslibroot,${SDKPATH},-arch,x86_64"
export CXXFLAGS="-isysroot ${SDKPATH} -arch x86_64 -stdlib=libc++"
export CFLAGS="-isysroot ${SDKPATH} -arch x86_64"
export SDKROOT="${SDKPATH}"
export MACOSX_DEPLOYMENT_TARGET=10.7
export MAC_OS_X_VERSION_MAX_ALLOWED=1070
export MAC_OS_X_VERSION_MIN_REQUIRED=1070

./configure --prefix=${lprefix} --enable-shared=NO --host=x86_64
if [ $? -ne 0 ]; then return 1; fi

# Patch ares_config.h to not use clock_gettime(), which is
# defined in OS 10.12 SDK but was not available before OS 10.12.
# If building with an older SDK, this patch will fail because
# config has already set our desired value.
rm -f ares_config.h.orig
cat >> /tmp/ares_config_h_diff << ENDOFFILE
--- ares_config_orig.h    2018-01-25 04:15:37.000000000 -0800
+++ ares_config.h    2018-02-22 01:30:57.000000000 -0800
@@ -74,7 +74,7 @@
 #define HAVE_BOOL_T 1

 /* Define to 1 if you have the clock_gettime function and monotonic timer. */
-#define HAVE_CLOCK_GETTIME_MONOTONIC 1
+/* #undef HAVE_CLOCK_GETTIME_MONOTONIC */

 /* Define to 1 if you have the closesocket function. */
 /* #undef HAVE_CLOSESOCKET */
ENDOFFILE

patch -bfi /tmp/ares_config_h_diff ares_config.h
rm -f /tmp/ares_config_h_diff
rm -f ares_config.h.rej

if [ "${doclean}" = "yes" ]; then
    make clean
fi

make 1>$stdout_target
if [ $? -ne 0 ]; then return 1; fi
make install 1>$stdout_target
if [ $? -ne 0 ]; then return 1; fi

lprefix=""
export CC="";export CXX=""
export LDFLAGS=""
export CXXFLAGS=""
export CFLAGS=""
export SDKROOT=""

return 0