Add more support for building Boost with different options (#1468)

util/build_prep/bootstrap_boost.sh

@@ -1,25 +1,58 @@
 #!/usr/bin/env bash
 
-set -o errexit
-set -o xtrace
-
 bootstrapArgs=()
+buildArgs=()
 useClang='false'
+useLibCXX='false'
 keepArchive='false'
-while getopts 'mck' OPT; do
+debugLevel=0
+buildCArgs=()
+buildCXXArgs=()
+buildLDArgs=()
+boostVersion='1.69'
+while getopts 'hmcCkpvB:' OPT; do
 	case "${OPT}" in
+		h)
+			echo "Usage: bootstrap_boost.sh [-hmcCkpv] [-B <boostVersion>]"
+			echo "   -h                 This help"
+			echo "   -m                 Build a minimal set of libraries needed for Nano"
+			echo "   -c                 Use Clang"
+			echo "   -C                 Use libc++ when using Clang"
+			echo "   -k                 Keep the downloaded archive file"
+			echo "   -p                 Build a PIC version of the objects"
+			echo "   -v                 Increase debug level, may be repeated to increase it"
+			echo "                      further"
+			echo "   -B <boostVersion>  Specify version of Boost to build"
+			exit 0
+			;;
 		m)
 			bootstrapArgs+=('--with-libraries=thread,log,filesystem,program_options')
 			;;
 		c)
 			useClang='true'
 			;;
+		C)
+			useLibCXX='true'
+			;;
 		k)
 			keepArchive='true'
 			;;
+		p)
+			buildCXXArgs+=(-fPIC)
+			buildCArgs+=(-fPIC)
+			;;
+		v)
+			debugLevel=$[$debugLevel + 1]
+			;;
+		B)
+			boostVersion="${OPTARG}"
+			;;
 	esac
 done
 
+set -o errexit
+set -o xtrace
+
 if ! c++ --version >/dev/null 2>/dev/null; then
 	useClang='true'
 
@@ -32,13 +65,31 @@ fi
 
 if [ "${useClang}" = 'true' ]; then
 	bootstrapArgs+=(--with-toolset=clang)
+	buildArgs+=(toolset=clang)
+	if [ "${useLibCXX}" = 'true' ]; then
+		buildCXXArgs+=(-stdlib=libc++)
+		buildLDArgs+=(-stdlib=libc++)
+	fi
 fi
 
-BOOST_BASENAME=boost_1_66_0
-BOOST_ROOT=${BOOST_ROOT-/usr/local/boost}
-BOOST_URL=https://downloads.sourceforge.net/project/boost/boost/1.66.0/${BOOST_BASENAME}.tar.bz2
+case "${boostVersion}" in
+	1.66)
+		BOOST_BASENAME=boost_1_66_0
+		BOOST_URL=https://downloads.sourceforge.net/project/boost/boost/1.66.0/${BOOST_BASENAME}.tar.bz2
+		BOOST_ARCHIVE_SHA256='5721818253e6a0989583192f96782c4a98eb6204965316df9f5ad75819225ca9'
+		;;
+	1.69)
+		BOOST_BASENAME=boost_1_69_0
+		BOOST_URL=https://downloads.sourceforge.net/project/boost/boost/1.69.0/${BOOST_BASENAME}.tar.bz2
+		BOOST_ARCHIVE_SHA256='8f32d4617390d1c2d16f26a27ab60d97807b35440d45891fa340fc2648b04406'
+		;;
+	*)
+		echo "Unsupported Boost version: ${boostVersion}" >&2
+		exit 1
+		;;
+esac
 BOOST_ARCHIVE="${BOOST_BASENAME}.tar.bz2"
-BOOST_ARCHIVE_SHA256='5721818253e6a0989583192f96782c4a98eb6204965316df9f5ad75819225ca9'
+BOOST_ROOT=${BOOST_ROOT-/usr/local/boost}
 
 if [ ! -f "${BOOST_ARCHIVE}" ]; then
 	wget --quiet -O "${BOOST_ARCHIVE}.new" "${BOOST_URL}"
@@ -53,12 +104,24 @@ else
 	keepArchive='true'
 fi
 
+if [ -n  "${buildCArgs[*]}" ]; then
+	buildArgs+=(cflags="${buildCArgs[*]}")
+fi
+
+if [ -n  "${buildCXXArgs[*]}" ]; then
+	buildArgs+=(cxxflags="${buildCXXArgs[*]}")
+fi
+
+if [ -n  "${buildLDArgs[*]}" ]; then
+	buildArgs+=(linkflags="${buildLDArgs[*]}")
+fi
+
 rm -rf "${BOOST_BASENAME}"
 tar xf "${BOOST_ARCHIVE}"
 
 pushd "${BOOST_BASENAME}"
 ./bootstrap.sh "${bootstrapArgs[@]}"
-./b2 -d0 --prefix="${BOOST_ROOT}" link=static install
+./b2 -d${debugLevel} --prefix="${BOOST_ROOT}" link=static "${buildArgs[@]}" install
 popd
 
 rm -rf "${BOOST_BASENAME}"