build-library.sh

#!/bin/bash
#
# Copyright (c) 2016 Johannes Schickel <lordhoto@gmail.com>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
#

# NLS nuisances.
LC_ALL=C
export LC_ALL
LANGUAGE=C
export LANGUAGE

function verbose_cmd {
    echo "$@"
    eval "$@"
}

if [ "X$1" = "X--no-shadow-build" ]; then
	shift 1
	SHADOW_BUILD_SUFFIX=""
else
	SHADOW_BUILD_SUFFIX="-build"
fi

BUILD_DIR=build/

if [ -z "$PARALLELISM" ]; then
	PARALLELISM=2
fi

if [ -z "$PACKAGE" ]; then
	echo "ERROR: \$PACKAGE not set."
	exit 1
fi
if [ -z "$PACKAGE_FILE" ]; then
	echo "ERROR: \$PACKAGE_FILE not set."
	exit 1
fi
if [ -z "$PATCH_DIR" ]; then
	echo "ERROR: \$PATCH_DIR not set."
	exit 1
fi
if [ -z "$CACHE_DIR" ]; then
	echo "ERROR: \$CACHE_DIR not set."
	exit 1
fi

if [ -z "$IOS_TOOLCHAIN_BASE" ]; then
	echo "ERROR: \$IOS_TOOLCHAIN_BASE needs to be set to toolchain's base directory."
	exit 1
fi
IOS_TOOLCHAIN_BASE=`realpath $IOS_TOOLCHAIN_BASE`

if [ -z "$TARGET" ]; then
	echo "ERROR: $TARGET needs to be set to the target triple."
	exit 1
fi
TARGET_BASE="$IOS_TOOLCHAIN_BASE/$TARGET"

export PATH="$IOS_TOOLCHAIN_BASE/bin:$TARGET_BASE/bin:$TARGET_BASE/usr/bin:$PATH"
export CC="$TARGET-clang"
export CXX="$TARGET-clang++"
export CPPFLAGS="-I$TARGET_BASE/usr/include"
export LDFLAGS="-L$TARGET_BASE/usr/lib"
export PKG_CONFIG="$TARGET-pkg-config"

mkdir -p "$BUILD_DIR"
pushd "$BUILD_DIR" &>/dev/null

echo "Preparing sources for $PACKAGE..."

case "$PACKAGE_FILE" in
	*.tar.*)
		tar xf "$PACKAGE_FILE"
		;;
	*)
		echo "ERROR: Unsupported package type."
		exit 1
		;;
esac

pushd "$PACKAGE" &>/dev/null
for i in `ls "$PATCH_DIR/$PACKAGE/" 2>/dev/null`; do
	echo "Apply patch $i..."
	patch -p1 < "$PATCH_DIR/$PACKAGE/$i" || exit 1
done
popd &>/dev/null

mkdir -p "$PACKAGE$SHADOW_BUILD_SUFFIX"
pushd "$PACKAGE$SHADOW_BUILD_SUFFIX" &>/dev/null
CACHE_OPT=""
if [ -f "$CACHE_DIR/$PACKAGE/$TARGET.cache" ]; then
	echo "Copying cache file..."
	CACHE_OPT="--cache-file=cache.cache"
	cp "$CACHE_DIR/$PACKAGE/$TARGET.cache" cache.cache
fi
popd &>/dev/null

echo "Building $PACKAGE for $TARGET..."

if [ -n "$PACKAGE_SUB" ]; then
	CONFIGURE="\"../$PACKAGE/$PACKAGE_SUB/configure\""
else
	CONFIGURE="\"../$PACKAGE/configure\""
fi

pushd "$PACKAGE$SHADOW_BUILD_SUFFIX" &>/dev/null
verbose_cmd "$CONFIGURE" "--host=$TARGET" "\"--prefix=$TARGET_BASE/usr\"" --disable-shared --enable-static $CACHE_OPT "$@" "&>build.log" || exit 1
verbose_cmd "make -j$PARALLELISM &>build.log" || exit 1
verbose_cmd "make install &>build.log" || exit 1
popd &>/dev/null

popd &>/dev/null

echo "Successfull library build."
chmod -R u+w "$BUILD_DIR"
rm -r "$BUILD_DIR"