# Build recipe for userspace-rcu (liburcu).
#
# Copyright (c) 2022 Matias Fonzo, <selk@dragora.org>.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#    http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

# Exit immediately on any error
set -e

program=userspace-rcu
pkgname=liburcu
version=0.13.1
release=2

# Define a category for the output of the package name
pkgcategory=libs

tarname=${program}-${version}.tar.bz2

# Remote source(s)
fetch=https://lttng.org/files/urcu/$tarname

description="
Userspace RCU (read-copy-update) library.

The liburcu package provides a set of userspace RCU (read-copy-update)
libraries.  These data synchronization libraries provide read-side access
which scales linearly with the number of cores.  It does so by allowing
multiples copies of a given data structure to live at the same time, and
by monitoring the data structure accesses to detect grace periods after
which memory reclamation is possible.
"

homepage=https://liburcu.org
license=LGPLv2.1

# Source documentation
docs="ChangeLog LICENSE README* *.txt"
docsdir="${docdir}/${program}-${version}"

build()
{
    unpack "${tardir}/$tarname"

    cd "$srcdir"

    # The value used in the Makefiles for PWD it is set to null
    # on the build, reason why we establish again to link against
    # the produced library objects
    find . -type f | xargs grep -l 'PWD' | xargs \
     sed -i 's@$(PWD)@$(shell pwd)@g'

    autoreconf -vif

    # Set sane permissions
    chmod -R u+w,go-w,a+rX-s .

    ./configure CPPFLAGS="$QICPPFLAGS" \
    CFLAGS="$QICFLAGS" LDFLAGS="$QILDFLAGS" \
     $configure_args \
     --libdir=/usr/lib${libSuffix} \
     --mandir=$mandir \
     --docdir=$docsdir \
     --enable-static=no \
     --enable-shared=yes \
     --build="$(gcc -dumpmachine)"

    make -j${jobs} V=1
    make -j${jobs} V=1 DESTDIR="$destdir" install

    # Please refer to the full source for the documentation
    rm -rf "${destdir}/$docsdirexamples"

    # Compress and link man pages (if needed)
    if test -d "${destdir}/$mandir"
    then
        (
            cd "${destdir}/$mandir"
            find . -type f -exec lzip -9 {} +
            find . -type l | while read -r file
            do
                ln -sf "$(readlink -- "$file").lz" "${file}.lz"
                rm -- "$file"
            done
        )
    fi

    # Copy documentation
    mkdir -p "${destdir}/$docsdir"
    cp -p $docs "${destdir}/$docsdir"
}

