DESCRIPTION = "C library for embedded systems"
LICENSE = "LGPL"
SECTION = "libs"
PRIORITY = "required"
MAINTAINER = "Gerald Britton <gbritton@doomcom.org>"

# We want to select whether we're building a uclibc or glibc system and
# perform provides accordingly.  We want to trigger on the original
# TARGET_VENDOR setting, so we must do this before changing it.
def target_is_uclibc(d):
    import oe
    if (oe.data.getVar('TARGET_VENDOR', d, 1) == '-uclibc'):
        return 1
    return 0
def cond_provides(d):
    import oe
    if target_is_uclibc(d):
        return 'virtual/libc'
    return ''
def cond_packages(d):
    import oe
    if target_is_uclibc(d):
        return '${PN} ${PN}-doc ${PN}-dev ${PN}-locale'
    return '${PN}-compat'
PROVIDES := "${@cond_provides(d)}"
PACKAGES := "${@cond_packages(d)}"

# When target is not a uclibc system, do a compat-only package
FILES_${PN}-compat = "${libdir}/lib*.so.* /lib/*.so*"

# This will ONLY build to this target (we override it incase we're buliding
# the world for a glibc system)
TARGET_VENDOR = "-uclibc"
TARGET_SYS = "${TARGET_ARCH}${TARGET_VENDOR}-${TARGET_OS}"
TARGET_PREFIX = "${TARGET_SYS}-"

FILESDIR = "${@os.path.dirname(oe.data.getVar('FILE',d,1))}/uclibc-${PV}"

DEPENDS = "virtual/${TARGET_PREFIX}binutils virtual/${TARGET_PREFIX}gcc-initial"

SRC_URI = "http://www.uclibc.org/downloads/uClibc-${PV}.tar.bz2 \
           http://www.uclibc.org/downloads/toolchain/kernel-headers-2.4.21.tar.bz2"

S = "${WORKDIR}/uClibc-${PV}"

UCLIBC_PREFIX = "${CROSS_DIR}/${TARGET_SYS}"
UCLIBC_STAGE_PREFIX = "${STAGING_DIR}/${HOST_SYS}"

EXTRA_OEMAKE = ""

uclibcbuild_do_patch() {
	rm -f ${WORKDIR}/linux/include/asm
	ln -sf asm-${TARGET_ARCH} ${WORKDIR}/linux/include/asm

	touch ${WORKDIR}/linux/include/linux/autoconf.h

	echo "#define UTS_RELEASE \"2.4.21\"" > ${WORKDIR}/linux/include/linux/version.h
	echo "#define LINUX_VERSION_CODE 132117" >> ${WORKDIR}/linux/include/linux/version.h
	echo "#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))" \
		>> ${WORKDIR}/linux/include/linux/version.h

	if [ -f ${FILESDIR}/uClibc.config.${TARGET_ARCH} ]; then
		cp ${FILESDIR}/uClibc.config.${TARGET_ARCH} ${S}/.config
	else
		echo ERROR: No target specific config for ${TARGET_ARCH}
	fi

	perl -i -p -e 's,^CROSS=.*,TARGET_ARCH=${TARGET_ARCH}\nCROSS=${TARGET_PREFIX},g' ${S}/Rules.mak
	perl -i -p -e 's,^KERNEL_SOURCE=.*,KERNEL_SOURCE=\"${WORKDIR}/linux\",g' ${S}/.config
	perl -i -p -e 's,^RUNTIME_PREFIX=.*,RUNTIME_PREFIX=\"/\",g' ${S}/.config
	perl -i -p -e 's,^DEVEL_PREFIX=.*,DEVEL_PREFIX=\"/${prefix}\",g' ${S}/.config
	perl -i -p -e 's,^SHARED_LIB_LOADER_PATH=.*,SHARED_LIB_LOADER_PATH=\"/lib\",g' ${S}/.config
	perl -i -p -e 's,.*UCLIBC_HAS_WCHAR.*,UCLIBC_HAS_WCHAR=y\nUCLIBC_HAS_LOCALE=n,g' ${S}/.config

	make oldconfig
}

python do_patch () {
	oe.build.exec_func('base_do_patch', d)
	oe.build.exec_func('uclibcbuild_do_patch', d)
}

do_stage() {
	# Install into the cross dir (this MUST be done first because we
	# will install crt1.o in the install_dev stage and gcc needs it)
	make PREFIX= DEVEL_PREFIX=${UCLIBC_PREFIX}/ \
		RUNTIME_PREFIX=${UCLIBC_PREFIX}/ \
		install_dev install_runtime install_utils

	# We don't really need this
	rm -f ${UCLIBC_PREFIX}/include/.cvsignore

	# Fixup shared lib symlinks
	( cd ${UCLIBC_STAGE_PREFIX}/lib
		for f in c crypt dl m nsl pthread resolv thread_db util; do
			ln -sf lib${f}.so.? lib${f}.so
		done
	)

	# Install into the staging dir
	make PREFIX= DEVEL_PREFIX=${UCLIBC_STAGE_PREFIX}/ \
		RUNTIME_PREFIX=${UCLIBC_STAGE_PREFIX}/ \
		install_dev install_runtime install_utils

	# We don't really need this
	rm -f ${UCLIBC_STAGE_PREFIX}/include/.cvsignore

	# Fixup shared lib symlinks
	( cd ${UCLIBC_STAGE_PREFIX}/lib
		for f in c crypt dl m nsl pthread resolv thread_db util; do
			ln -sf lib${f}.so.? lib${f}.so
		done
	)
}

do_install() {
	make PREFIX=${D} DEVEL_PREFIX=${prefix}/ RUNTIME_PREFIX=/ \
		install_dev install_runtime install_utils

	# We don't really need this in /usr/include
	rm -f ${D}/${prefix}/include/.cvsignore
}