openocd/contrib/cross-build.sh

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#!/bin/sh
# This is an example of how to do a cross-build of OpenOCD using pkg-config.
# Cross-building with pkg-config is deceptively hard and most guides and
# tutorials are incomplete or give bad advice. Some of the traps that are easy
# to fall in but handled by this script are:
#
# * Polluting search paths and flags with values from the build system.
# * Faulty pkg-config wrappers shipped with distribution packaged cross-
# toolchains.
# * Build failing because pkg-config discards some paths even though they are
# correctly listed in the .pc file.
# * Getting successfully built binaries that cannot find runtime data because
# paths refer to the build file system.
#
# This script is probably more useful as a reference than as a complete build
# tool but for some configurations it may be usable as-is. It only cross-builds
# libusb-1.0, hidapi, libftdi and capstone from source, but the script can be
# extended to build other prerequisites in a similar manner.
#
# Usage:
# export LIBUSB1_SRC=/path/to/libusb-1.0
# export HIDAPI_SRC=/path/to/hidapi
# export OPENOCD_CONFIG="--enable-..."
# cd /work/dir
# /path/to/openocd/contrib/cross-build.sh <host-triplet>
#
# For static linking, a workaround is to
# export LIBUSB1_CONFIG="--enable-static --disable-shared"
#
# All the paths must not contain any spaces.
set -e -x
WORK_DIR=$PWD
## Source code paths, customize as necessary
: ${OPENOCD_SRC:="`dirname "$0"`/.."}
: ${LIBUSB1_SRC:=/path/to/libusb1}
: ${HIDAPI_SRC:=/path/to/hidapi}
: ${LIBFTDI_SRC:=/path/to/libftdi}
: ${CAPSTONE_SRC:=/path/to/capstone}
OPENOCD_SRC=`readlink -m $OPENOCD_SRC`
LIBUSB1_SRC=`readlink -m $LIBUSB1_SRC`
HIDAPI_SRC=`readlink -m $HIDAPI_SRC`
LIBFTDI_SRC=`readlink -m $LIBFTDI_SRC`
CAPSTONE_SRC=`readlink -m $CAPSTONE_SRC`
HOST_TRIPLET=$1
BUILD_DIR=$WORK_DIR/$HOST_TRIPLET-build
LIBUSB1_BUILD_DIR=$BUILD_DIR/libusb1
HIDAPI_BUILD_DIR=$BUILD_DIR/hidapi
LIBFTDI_BUILD_DIR=$BUILD_DIR/libftdi
CAPSTONE_BUILD_DIR=$BUILD_DIR/capstone
OPENOCD_BUILD_DIR=$BUILD_DIR/openocd
## Root of host file tree
SYSROOT=$WORK_DIR/$HOST_TRIPLET-root
## Install location within host file tree
: ${PREFIX=/usr}
## Make parallel jobs
: ${MAKE_JOBS:=1}
## OpenOCD-only install dir for packaging
: ${OPENOCD_TAG:=`git --git-dir=$OPENOCD_SRC/.git describe --tags`}
PACKAGE_DIR=$WORK_DIR/openocd_${OPENOCD_TAG}_${HOST_TRIPLET}
#######
# Create pkg-config wrapper and make sure it's used
export PKG_CONFIG=$WORK_DIR/$HOST_TRIPLET-pkg-config
cat > $PKG_CONFIG <<EOF
#!/bin/sh
SYSROOT=$SYSROOT
export PKG_CONFIG_DIR=
export PKG_CONFIG_LIBDIR=\${SYSROOT}$PREFIX/lib/pkgconfig:\${SYSROOT}$PREFIX/share/pkgconfig
export PKG_CONFIG_SYSROOT_DIR=\${SYSROOT}
# The following have to be set to avoid pkg-config to strip /usr/include and /usr/lib from paths
# before they are prepended with the sysroot path. Feels like a pkg-config bug.
export PKG_CONFIG_ALLOW_SYSTEM_CFLAGS=
export PKG_CONFIG_ALLOW_SYSTEM_LIBS=
exec pkg-config "\$@"
EOF
chmod +x $PKG_CONFIG
# Clear out work dir
rm -rf $SYSROOT $BUILD_DIR
mkdir -p $SYSROOT
# libusb-1.0 build & install into sysroot
if [ -d $LIBUSB1_SRC ] ; then
mkdir -p $LIBUSB1_BUILD_DIR
cd $LIBUSB1_BUILD_DIR
$LIBUSB1_SRC/configure --build=`$LIBUSB1_SRC/config.guess` --host=$HOST_TRIPLET \
--with-sysroot=$SYSROOT --prefix=$PREFIX \
$LIBUSB1_CONFIG
make -j $MAKE_JOBS
make install DESTDIR=$SYSROOT
fi
# hidapi build & install into sysroot
if [ -d $HIDAPI_SRC ] ; then
mkdir -p $HIDAPI_BUILD_DIR
cd $HIDAPI_BUILD_DIR
$HIDAPI_SRC/configure --build=`$HIDAPI_SRC/config.guess` --host=$HOST_TRIPLET \
--with-sysroot=$SYSROOT --prefix=$PREFIX \
$HIDAPI_CONFIG
make -j $MAKE_JOBS
make install DESTDIR=$SYSROOT
fi
# libftdi build & install into sysroot
if [ -d $LIBFTDI_SRC ] ; then
mkdir -p $LIBFTDI_BUILD_DIR
cd $LIBFTDI_BUILD_DIR
# note : libftdi versions < 1.5 requires libusb1 static
# hint use : # export LIBUSB1_CONFIG="--enable-static ..."
# not needed since libftdi-1.5 when LIBFTDI_CONFIG="-DSTATICLIBS=OFF ..."
# fix <toolchain>.cmake file
ESCAPED_SYSROOT=$(printf '%s\n' "$SYSROOT" | sed -e 's/[\/&]/\\&/g')
sed -i -E "s/(SET\(CMAKE_FIND_ROOT_PATH\s+).+\)/\1${ESCAPED_SYSROOT})/" \
${LIBFTDI_SRC}/cmake/Toolchain-${HOST_TRIPLET}.cmake
cmake $LIBFTDI_CONFIG \
-DCMAKE_TOOLCHAIN_FILE=${LIBFTDI_SRC}/cmake/Toolchain-${HOST_TRIPLET}.cmake \
-DCMAKE_INSTALL_PREFIX=${PREFIX} \
-DPKG_CONFIG_EXECUTABLE=`which pkg-config` \
$LIBFTDI_SRC
make install DESTDIR=$SYSROOT
fi
# capstone build & install into sysroot
if [ -d $CAPSTONE_SRC ] ; then
mkdir -p $CAPSTONE_BUILD_DIR
cd $CAPSTONE_BUILD_DIR
cp -r $CAPSTONE_SRC/* .
make install DESTDIR=$SYSROOT PREFIX=$PREFIX \
CROSS="${HOST_TRIPLET}-" \
$CAPSTONE_CONFIG
# fix the generated capstone.pc
CAPSTONE_PC_FILE=${SYSROOT}${PREFIX}/lib/pkgconfig/capstone.pc
sed -i '/^libdir=/d' $CAPSTONE_PC_FILE
sed -i '/^includedir=/d' $CAPSTONE_PC_FILE
sed -i '/^archive=/d' $CAPSTONE_PC_FILE
sed -i '1s;^;prefix=/usr \
exec_prefix=${prefix} \
libdir=${exec_prefix}/lib \
includedir=${prefix}/include/capstone\n\n;' $CAPSTONE_PC_FILE
fi
# OpenOCD build & install into sysroot
mkdir -p $OPENOCD_BUILD_DIR
cd $OPENOCD_BUILD_DIR
$OPENOCD_SRC/configure --build=`$OPENOCD_SRC/config.guess` --host=$HOST_TRIPLET \
--with-sysroot=$SYSROOT --prefix=$PREFIX \
$OPENOCD_CONFIG
make -j $MAKE_JOBS
make install-strip DESTDIR=$SYSROOT
# Separate OpenOCD install w/o dependencies. OpenOCD will have to be linked
# statically or have dependencies packaged/installed separately.
make install-strip DESTDIR=$PACKAGE_DIR