# Build recipe for libunwind.
#
# Copyright (c) 2022-2023 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=libunwind
version=20230323_5010beb0
release=1

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

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

# Remote source(s)
fetch="
 https://dragora.mirror.garr.it/current/sources/$tarname
 rsync://rsync.dragora.org/current/sources/$tarname
"

description="
A C interface to determine the call-chain of a program.

The primary goal of this project is to define a portable and efficient
C programming interface (API) to determine the call-chain of a program.

The API additionally provides the means to manipulate the preserved
(callee-saved) state of each call-frame and to resume execution at any
point in the call-chain (non-local goto). The API supports both local
(same-process) and remote (across-process) operation.  As such, the
API is useful in a number of applications.
"

homepage=https://www.nongnu.org/libunwind/
license=MIT

# Source documentation
docs="AUTHORS ChangeLog LICENSE NEWS README* TODO"
docsdir="${docdir}/${program}-${version}"

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

    cd "$srcdir"

    # Apply some patches from "Alpine Linux"
    for patch in "${worktree}"/patches/libunwind/*.patch
    do
        if test -f "$patch"
        then
            echo "    Applying patch file $patch ..."
            patch -Np1 -i "$patch"
        fi
    done
    unset -v patch

    # Update for hosts based on musl
    cp -f "${worktree}/archive/common/config.guess" config.guess
    cp -f "${worktree}/archive/common/config.sub" config.sub

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

    autoreconf -vif

    ./configure CPPFLAGS="$QICPPFLAGS" \
    CFLAGS="$QICFLAGS" CXXFLAGS="$QICXXFLAGS" \
    LDFLAGS="$(echo "$QILDFLAGS" | sed 's/-s//')" \
    LDFLAGS="$QILDFLAGS -lucontext" \
     $configure_args \
     --libdir=/usr/lib${libSuffix} \
     --infodir=$infodir \
     --mandir=$mandir \
     --docdir=$docsdir \
     --enable-cxx-exceptions \
     --build="$(gcc -dumpmachine)"

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

    # Compress info documents deleting index file for the package
    if test -d "${destdir}/$infodir"
    then
        rm -f "${destdir}/${infodir}/dir"
        lzip -9 "${destdir}/${infodir}"/*
    fi

    # 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"
}

