#!/bin/sh

# Slackware build script for musl

# Copyright 2014 Weldon Goree <weldon@langurwallah.org>
# Copyright 2019 - 2020 Johannes Schoepfer, Germany
# All rights reserved
#
# Redistribution and use of this script, with or without modification, is
# permitted provided that the following conditions are met:
#
# 1. Redistributions of this script must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
#
#  THIS SOFTWARE IS PROVIDED BY THE AUTHOR "AS IS" AND ANY EXPRESS OR IMPLIED
#  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
#  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO
#  EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
#  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
#  PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
#  OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
#  WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
#  OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
#  ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

cd $(dirname $0) ; CWD=$(pwd)

PKGNAM=musl
VERSION=${VERSION:-1.2.2}
#VERSION=${VERSION:-1.2.2_pre6}
BUILD=${BUILD:-2}
FTS_version=${FTS_version:-1.2.7}
OBSTACK_version=${OBSTACK_version:-1.1}
LIBEXECINFO_version=${OBSTACK_version:-1.1}

if [ -z "$ARCH" ]; then
  case "$( uname -m )" in
    i?86) ARCH=i586 ;;
    arm*) ARCH=arm ;;
       *) ARCH=$( uname -m ) ;;
  esac
fi

NUMJOBS=${NUMJOBS:-" -j$(expr $(nproc) + 1) "}

TMP=${TMP:-/tmp}
PKG=$TMP/package-$PKGNAM

if [ "$ARCH" = "i586" ]; then
  SLKCFLAGS="-O2 -march=i586 -mtune=i686"
  LIBDIRSUFFIX=""
elif [ "$ARCH" = "i686" ]; then
  SLKCFLAGS="-O2 -march=i686 -mtune=i686"
  LIBDIRSUFFIX=""
elif [ "$ARCH" = "x86_64" ]; then
  SLKCFLAGS="-O2 -fPIC"
  LIBDIRSUFFIX=""
else
  SLKCFLAGS="-O2"
  LIBDIRSUFFIX=""
fi

set -e

rm -rf $PKG
mkdir -p $TMP $PKG
cd $TMP
rm -rf $PKGNAM-$VERSION
tar xvf $CWD/$PKGNAM-$VERSION.tar.gz
cd $PKGNAM-$VERSION
#cd 1e4204d522670a1d8b8ab85f1cfefa960547e8af

chown -R root:root .
find -L . \
 \( -perm 777 -o -perm 775 -o -perm 750 -o -perm 711 -o -perm 555 \
  -o -perm 511 \) -exec chmod 755 {} \; -o \
 \( -perm 666 -o -perm 664 -o -perm 640 -o -perm 600 -o -perm 444 \
  -o -perm 440 -o -perm 400 \) -exec chmod 644 {} \;

#CFLAGS="$SLKCFLAGS" \
#CXXFLAGS="$SLKCFLAGS" \
LDFLAGS="-Wl,-soname,libc.musl-${ARCH}.so.1" \
./configure \
  --prefix=/usr \
  --sysconfdir=/etc \
  --localstatedir=/var \
  --mandir=/usr/man \
  --infodir=/usr/info \
  --build=$ARCH-slackware-linux-musl

make $NUMJOBS || exit 1
make DESTDIR=$PKG install

# make LDSO the be the real file, and libc the symlink
LDSO=$(make -f Makefile --eval "$(echo -e 'print-ldso:\n\t@echo $$(basename $(LDSO_PATHNAME))')" print-ldso)
mv -f $PKG/usr/lib/libc.so $PKG/lib/$LDSO
ln -sf $LDSO $PKG/lib/libc.musl-${ARCH}.so.1
ln -sf ../../lib/$LDSO $PKG/usr/lib/libc.so

# compatibility links for glibc
#_ld="lib64/ld-linux-x86-64.so.2"
#mkdir -p $PKG/${_ld%/*}
#ln -sf /lib/libc.musl-${ARCH}.so.1 $PKG/$_ld

for i in libc.so.6 libcrypt.so.1 libm.so.6 libpthread.so.0 librt.so.1 libutil.so.1; do
  ln -s /lib/libc.musl-${ARCH}.so.1 $PKG/lib/$i
done

mkdir -p $PKG/usr/bin
cat >>$PKG/usr/bin/ldd <<-EOF
#!/bin/sh
exec /lib/ld-musl-$ARCH.so.1 --list "\$@"
EOF
chmod 755 $PKG/usr/bin/ldd


## Not provided by musl ##

mkdir $PKG/sbin
cp $CWD/ldconfig $PKG/sbin/ldconfig
chmod 755 $PKG/sbin/ldconfig

# getconf/getent/iconv
for i in getconf getent iconv ; do
  gcc $SLKCFLAGS $CWD/$i.c -o $PKG/usr/bin/$i || exit 1
done

ARGP_version=${ARGP_version:-1.3}
tar xvf $CWD/argp-standalone-$ARGP_version.tar.gz
cd argp-standalone-$ARGP_version
  patch -p1 < $CWD/patches/001-throw-in-funcdef.patch || exit 1
  patch -p1 < $CWD/patches/gnu89-inline.patch || exit 1
  autoreconf -vif
  CFLAGS="$SLKCFLAGS" \
  ./configure \
    --prefix=/usr \
    --sysconfdir=/etc \
    --localstatedir=/var \
    --mandir=/usr/man \
    --infodir=/usr/info \
    --host=$ARCH-slackware-linux-musl \
    --build=$ARCH-slackware-linux-musl
  make $NUMJOBS || exit 1
  make check || exit 1
  mkdir -p $PKG/usr/include
  install -D -m644 argp.h $PKG/usr/include/argp.h
  install -D -m755 libargp.a $PKG/usr/lib/libargp.a
cd ..

# Provides the fts(3) functions, which are missing in musl libc
# https://github.com/pullmoll/musl-fts/"
unzip $CWD/fts-$FTS_version.zip
cd musl-fts-$FTS_version
./bootstrap.sh
CFLAGS=-fPIC ./configure \
  --prefix=/usr \
  --sysconfdir=/etc \
  --mandir=/usr/man \
  --localstatedir=/var \
  --build=$ARCH-slackware-linux-musl

  make || exit 1
  make check || exit 1
  make DESTDIR=$PKG install

  mkdir -p $PKG/usr/lib/pkgconfig
  cp musl-fts.pc $PKG/usr/lib/pkgconfig/libfts.pc
cd ..

tar vxf $CWD/obstack-$OBSTACK_version.tar.gz || exit 1
cd musl-obstack-$OBSTACK_version
  ./bootstrap.sh
  ./configure --prefix=/usr
  make || exit 1
  make DESTDIR=$PKG install || exit 1
cd ..

# "Implementation of nscd for nsswitch modules for musl"
# https://github.com/pikhq/musl-nscd/
tar vxf $CWD/musl-nscd-1.0.3.tar.gz
cd musl-nscd-1.0.3
patch -p1 < $CWD/patches/0001-Fix-build-under-GCC-fno-common.patch || exit 1
./configure \
--build=$ARCH-slackware-linux-musl \
--host=$ARCH-slackware-linux-musl \
--prefix=/usr \
--sysconfdir=/etc \
--mandir=/usr/man \
--localstatedir=/var
make || exit 1
make DESTDIR=$PKG install || exit 1

install -m644 -D include/nss.h \
$PKG/usr/include

install -m644 -D COPYRIGHT \
  $PKG/usr/doc/musl-$VERSION/COPYRIGHT-musl-nscd
#	install -m755 -D "$srcdir"/$pkgname.initd \
#		"$pkgdir"/etc/init.d/nscd
cd ..

# This seems not to be a help for qt5 and probably others,
# as execinfo doesn't provide the same as glibc's execinfo
# But seems needed for llvm

#BSD licensed clone of the GNU libc backtrace facility.
#url https://www.freshports.org/devel/libexecinfo
tar vxf $CWD/libexecinfo-$LIBEXECINFO_version.tar.bz2 || exit
cd libexecinfo-$LIBEXECINFO_version
  patch -p1 < $CWD/patches/10-execinfo.patch
  patch -p1 < $CWD/patches/20-define-gnu-source.patch 
  patch -p1 < $CWD/patches/30-linux-makefile.patch
  export CFLAGS="$SLKCFLAGS -fno-omit-frame-pointer"
  make || exit 1
  cp execinfo.h \
    $PKG/usr/include/execinfo.h
  cp stacktraverse.h \
    $PKG/usr/include/stacktraverse.h
  cp libexecinfo.a \
    $PKG/usr/lib/libexecinfo.a
  cp libexecinfo.so.1 \
    $PKG/usr/lib/libexecinfo.so.1
  ln -s libexecinfo.so.1 \
    $PKG/usr/lib/libexecinfo.so
cd ..

# locales
# https://gitlab.com/api/v4/projects/rilian-la-te%2Fmusl-locales/repository/archive?sha=1101fb2bcdd189cd9415b8bd1c775eb43527d25c
commit=1101fb2bcdd189cd9415b8bd1c775eb43527d25c
tar vxf $CWD/musl-locales-20201005.tar.gz || exit 1
cd musl-locales-$commit-$commit
patch -p1 < $CWD/add-all-available-locales.patch || exit 1
mkdir build
cd build 
cmake \
  -DCMAKE_BUILD_TYPE=None \
  -DCMAKE_INSTALL_PREFIX=/usr \
  -DCMAKE_C_FLAGS="$SLKCFLAGS" \
  ..
  make || exit 1
  make install DESTDIR=$PKG || exit 1
cd ../..

# BSD compatibility headers
mkdir -p $PKG/usr/include/sys
install -D $CWD/bsd_headers/sys-cdefs.h $PKG/usr/include/sys/cdefs.h
install -D $CWD/bsd_headers/sys-queue.h $PKG/usr/include/sys/queue.h
install -D $CWD/bsd_headers/sys-tree.h $PKG/usr/include/sys/tree.h

find $PKG -print0 | xargs -0 file | grep -e "executable" -e "shared object" | grep ELF \
  | cut -f 1 -d : | xargs strip --strip-unneeded 2> /dev/null || true

mkdir -p $PKG/usr/doc/$PKGNAM-$VERSION
cp -a COPYRIGHT INSTALL README VERSION WHATSNEW $PKG/usr/doc/$PKGNAM-$VERSION
cat $CWD/$PKGNAM.SlackBuild > $PKG/usr/doc/$PKGNAM-$VERSION/$PKGNAM.SlackBuild

mkdir -p $PKG/install
cat $CWD/slack-desc > $PKG/install/slack-desc

cd $PKG
/sbin/makepkg -l y -c n $TMP/$PKGNAM-$VERSION-$ARCH-$BUILD.txz