105 lines
3.2 KiB
Bash
105 lines
3.2 KiB
Bash
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#!/bin/sh
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# This is an example of how to do a cross-build of OpenOCD using pkg-config.
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# Cross-building with pkg-config is deceptively hard and most guides and
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# tutorials are incomplete or give bad advice. Some of the traps that are easy
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# to fall in but handled by this script are:
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#
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# * Polluting search paths and flags with values from the build system.
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# * Faulty pkg-config wrappers shipped with distribution packaged cross-
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# toolchains.
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# * Build failing because pkg-config discards some paths even though they are
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# correctly listed in the .pc file.
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# * Getting successfully built binaries that cannot find runtime data because
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# paths refer to the build file system.
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#
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# This script is probably more useful as a reference than as a complete build
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# tool but for some configurations it may be usable as-is. It only cross-
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# builds libusb-1.0 from source, but the script can be extended to build other
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# prerequisities in a similar manner.
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#
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# Usage:
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# export LIBUSB1_SRC=/path/to/libusb-1.0
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# export OPENOCD_CONFIG="--enable-..."
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# cd /work/dir
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# /path/to/openocd/contrib/cross-build.sh <host-triplet>
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#
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# For static linking, a workaround is to
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# export LIBUSB1_CONFIG="--enable-static --disable-shared"
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#
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# All the paths must not contain any spaces.
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set -e -x
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WORK_DIR=$PWD
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## Source code paths, customize as necessary
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: ${OPENOCD_SRC:="`dirname "$0"`/.."}
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: ${LIBUSB1_SRC:=/path/to/libusb}
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OPENOCD_SRC=`readlink -m $OPENOCD_SRC`
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LIBUSB1_SRC=`readlink -m $LIBUSB1_SRC`
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HOST_TRIPLET=$1
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BUILD_DIR=$WORK_DIR/$HOST_TRIPLET-build
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LIBUSB1_BUILD_DIR=$BUILD_DIR/libusb1
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OPENOCD_BUILD_DIR=$BUILD_DIR/openocd
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## Root of host file tree
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SYSROOT=$WORK_DIR/$HOST_TRIPLET-root
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## Install location within host file tree
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: ${PREFIX=/usr}
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## OpenOCD-only install dir for packaging
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PACKAGE_DIR=$WORK_DIR/openocd_`git --git-dir=$OPENOCD_SRC/.git describe`_$HOST_TRIPLET
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#######
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# Create pkg-config wrapper and make sure it's used
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export PKG_CONFIG=$WORK_DIR/$HOST_TRIPLET-pkg-config
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cat > $PKG_CONFIG <<EOF
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#!/bin/sh
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SYSROOT=$SYSROOT
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export PKG_CONFIG_DIR=
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export PKG_CONFIG_LIBDIR=\${SYSROOT}$PREFIX/lib/pkgconfig:\${SYSROOT}$PREFIX/share/pkgconfig
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export PKG_CONFIG_SYSROOT_DIR=\${SYSROOT}
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# The following have to be set to avoid pkg-config to strip /usr/include and /usr/lib from paths
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# before they are prepended with the sysroot path. Feels like a pkg-config bug.
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export PKG_CONFIG_ALLOW_SYSTEM_CFLAGS=
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export PKG_CONFIG_ALLOW_SYSTEM_LIBS=
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exec pkg-config "\$@"
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EOF
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chmod +x $PKG_CONFIG
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# Clear out work dir
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rm -rf $SYSROOT $BUILD_DIR
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mkdir -p $SYSROOT
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# libusb-1.0 build & install into sysroot
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mkdir -p $LIBUSB1_BUILD_DIR
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cd $LIBUSB1_BUILD_DIR
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$LIBUSB1_SRC/configure --build=`$LIBUSB1_SRC/config.guess` --host=$HOST_TRIPLET \
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--with-sysroot=$SYSROOT --prefix=$PREFIX \
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$LIBUSB1_CONFIG
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make
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make install DESTDIR=$SYSROOT
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# OpenOCD build & install into sysroot
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mkdir -p $OPENOCD_BUILD_DIR
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cd $OPENOCD_BUILD_DIR
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$OPENOCD_SRC/configure --build=`$OPENOCD_SRC/config.guess` --host=$HOST_TRIPLET \
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--with-sysroot=$SYSROOT --prefix=$PREFIX \
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$OPENOCD_CONFIG
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make
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make install DESTDIR=$SYSROOT
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# Separate OpenOCD install w/o dependencies. OpenOCD will have to be linked
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# statically or have dependencies packaged/installed separately.
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make install DESTDIR=$PACKAGE_DIR
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