#!/bin/bash

# Copyright 2006, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024  Patrick J. Volkerding, Sebeka, MN, USA
# 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=glibc
VERSION=${VERSION:-$(echo glibc-*.tar.xz | rev | cut -f 3- -d . | cut -f 1 -d - | rev)}
CHECKOUT=${CHECKOUT:-""}
BUILD=${BUILD:-3}

# I was considering disabling NSCD, but MoZes talked me out of it.  :)
#DISABLE_NSCD=" --disable-nscd "

# $ARCH may be preset, otherwise i686 (pentium4) is the Slackware default.
if [ -z "$ARCH" ]; then
  case "$( uname -m )" in
    i?86) export ARCH=i686 ;;
    arm*) export ARCH=arm ;;
    # Unless $ARCH is already set, use uname -m for all other archs:
       *) export ARCH=$( uname -m ) ;;
  esac
fi

# If the variable PRINT_PACKAGE_NAME is set, then this script will report what
# the name of the created package would be, and then exit. This information
# could be useful to other scripts.
if [ ! -z "${PRINT_PACKAGE_NAME}" ]; then
  echo "glibc-$VERSION-$ARCH-$BUILD.txz"
  echo "glibc-i18n-$VERSION-$ARCH-$BUILD.txz"
  echo "glibc-profile-$VERSION-$ARCH-$BUILD.txz"
  echo "aaa_glibc-solibs-$VERSION-$ARCH-$BUILD.txz"
  exit 0
fi

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

# Work around -Werror failure with gcc-10.2.0.
# NOTE: Until the next glibc release takes care of this issue, this will
# likely need to be updated with every new gcc release's version. Yes, we
# could pass --disable-werror by default, but I'd rather not just shove a
# stick in it like that.
if [ "$(gcc -dumpversion)" = "10.2.0" ]; then
  if [ "$VERSION" = "2.30" ]; then
    WERROR="--disable-werror"
  fi
fi

# I'll break this out as an option for fun  :-)
#
# NOTE: -mstackrealign improves compatibility with old binaries.
# -fno-omit-frame-pointer -mno-omit-leaf-frame-pointer will improve
# binary compatibility as well, and at negligible cost if it's only
# applied to glibc. Also useful for profiling.
case $ARCH  in
  i586)
    OPTIMIZ="-O3 -march=i586 -mtune=i686"
    LIBDIRSUFFIX=""
    ;;
  i686)
    OPTIMIZ="-O3 -march=pentium4 -mtune=generic -mstackrealign -fno-omit-frame-pointer -mno-omit-leaf-frame-pointer"
    LIBDIRSUFFIX=""
    ;;
  x86_64)
    OPTIMIZ="-O3 -march=x86-64 -mtune=generic -fPIC -mstackrealign -fno-omit-frame-pointer -mno-omit-leaf-frame-pointer"
    LIBDIRSUFFIX="64"
    ;;
  *)
    OPTIMIZ="-O3"
    LIBDIRSUFFIX=""
    ;;
esac

case $ARCH in
  x86_64)
    TARGET=${TARGET:-x86_64}
    ;;
  i686)
    # This should be i686 for all 32-bit x86 arch:
    TARGET=${TARGET:-i686}
    ;;
esac

# Hand off the $ARCH variable to $SLACKWARE_ARCH to avoid confusing glibc:
SLACKWARE_ARCH=$ARCH
unset ARCH

CVSVER=${VERSION}${CHECKOUT}

# NOTE!!!  glibc needs to be built against the sanitized kernel headers,
# which will be installed under /usr/include by the kernel-headers package.
# Be sure the correct version of the headers package is installed BEFORE
# building glibc!

TMP=${TMP:-/tmp}
mkdir -p $TMP

# This function fixes a doinst.sh file for x86_64.
# With thanks to Fred Emmott.
fix_doinst() {
  if [ "x$LIBDIRSUFFIX" = "x" ]; then
    return;
  fi;
  # Fix "( cd usr/lib ;" occurrences
  sed -i "s#lib ;#lib${LIBDIRSUFFIX} ;#" install/doinst.sh
  # Fix "lib/" occurrences
  sed -i "s#lib/#lib${LIBDIRSUFFIX}/#g" install/doinst.sh
  # Fix "( cd lib" occurrences
  sed -i "s#( cd lib\$#( cd lib${LIBDIRSUFFIX}#" install/doinst.sh

  if [ "$SLACKWARE_ARCH" = "x86_64" ]; then
    sed -i 's#ld-linux.so.2#ld-linux-x86-64.so.2#' install/doinst.sh
  fi
}

# This is a patch function to put all glibc patches in the build script
# up near the top.
apply_patches() {
  # Use old-style locale directories rather than a single (and strangely
  # formatted) /usr/lib/locale/locale-archive file:
  zcat $CWD/glibc.locale.no-archive.diff.gz | patch -p1 --verbose || exit 1
  # Support ru_RU.CP1251 locale:
  zcat $CWD/glibc.ru_RU.CP1251.diff.gz | patch -p1 --verbose || exit 1
  # Don't use AM/PM format for date(1). That's just plain crazy.
  zcat $CWD/glibc-2.32.en_US.no.am.pm.date.format.diff.gz | patch -p1 --verbose || exit 1
  # Other regression fixes from git:
  for git_patch in $CWD/patches/*.patch.gz ; do
    zcat $git_patch | patch -p1 --verbose || exit 1
  done
}

# This is going to be the initial $DESTDIR:
export PKG=$TMP/package-glibc-incoming-tree
PGLIBC=$TMP/package-glibc
PSOLIBS=$TMP/package-aaa_glibc-solibs
PI18N=$TMP/package-glibc-i18n
PPROFILE=$TMP/package-glibc-profile
PDEBUG=$TMP/package-glibc-debug

# Empty these locations first:
for dir in $PKG $PGLIBC $PSOLIBS $PZONE $PI18N $PPROFILE $PDEBUG ; do
  if [ -d $dir ]; then
    rm -rf $dir
  fi
  mkdir -p $dir
done
if [ -d $TMP/glibc-$VERSION ]; then
  rm -rf $TMP/glibc-$VERSION
fi

# Create an incoming directory structure for glibc to be built into:
mkdir -p $PKG/lib${LIBDIRSUFFIX}
mkdir -p $PKG/sbin
mkdir -p $PKG/usr/bin
mkdir -p $PKG/usr/lib${LIBDIRSUFFIX}
mkdir -p $PKG/usr/sbin
mkdir -p $PKG/usr/include
mkdir -p $PKG/usr/doc
mkdir -p $PKG/usr/man
mkdir -p $PKG/usr/share
mkdir -p $PKG/var/db/nscd
mkdir -p $PKG/var/run/nscd

# Begin extract/compile:
cd $TMP
rm -rf glibc-$CVSVER
echo "Extracting $CWD/glibc-$CVSVER.tar.?z..."
tar xf $CWD/glibc-$CVSVER.tar.xz \
  || tar xf $CWD/glibc-$CVSVER.tar.lz \
  || tar xf $CWD/glibc-$CVSVER.tar.gz
cd glibc-$CVSVER

# Apply patches; exit if any fail.
apply_patches
if [ ! $? = 0 ]; then
  exit 1
fi

# Clean up leftover CVS directories:
find . -type d -name CVS -exec rm -r {} \+ 2> /dev/null

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

# Make build directory:
mkdir build-glibc-$VERSION
cd build-glibc-$VERSION || exit 1

echo "BUILDING DAS NPTL GLIBC"
CFLAGS="-g $OPTIMIZ" \
CXXFLAGS="-g $OPTIMIZ" \
../configure \
  --prefix=/usr \
  --libdir=/usr/lib${LIBDIRSUFFIX} \
  --enable-kernel=4.4 \
  --with-headers=/usr/include \
  --enable-add-ons \
  --enable-multi-arch \
  --enable-profile \
  $DISABLE_NSCD \
  $WERROR \
  --infodir=/usr/info \
  --mandir=/usr/man \
  --with-tls \
  --with-__thread \
  --without-cvs \
  $TARGET-slackware-linux

make $NUMJOBS || exit 1
make $NUMJOBS install install_root=$PKG || exit 1
# Don't use this, as it makes the i18n package WAY bigger:
#make localedata/install-locale-files DESTDIR=$PKG || exit 1
# This is ugly run in parallel, and seems to hang at the end. But it actually
# completes much faster. :)
make $NUMJOBS localedata/install-locales install_root=$PKG DESTDIR=$PKG || exit 1

# Build and install libxcrypt:
pushd $CWD
ARCH=$SLACKWARE_ARCH LIBDIRSUFFIX=$LIBDIRSUFFIX SLKCFLAGS=$OPTIMIZ ./libxcrypt.build
popd

# We've always had an sln symlink in /bin, so let's make sure it
# remains there so as not to break any scripts that might need it:
mkdir -p $PKG/bin
( cd $PKG/bin ; ln -sf /sbin/sln sln )

# This bit was mostly copped from Fedora Rawhide's .spec file. I'm not
# entirely sure how important it is, since I'm not aware of anything
# we ship trying to link libpthread as static. What it does is make sure
# that anything linking libpthread static includes all of the functions
# so that the resulting binary doesn't rely on parts of the library that
# were not linked in. Optimizing actually working over binary size, so
# to speak.
( cd $PKG/usr/lib${LIBDIRSUFFIX}
  gcc -r -nostdlib -o libpthread.o -Wl,--whole-archive ./libpthread.a
  rm libpthread.a
  ar rcs libpthread.a libpthread.o
  rm libpthread.o
)

# The prevailing standard seems to be putting unstripped libraries in
# /usr/lib/debug/ and stripping the debugging symbols from all the other
# libraries.
mkdir -p $PKG/usr/lib${LIBDIRSUFFIX}/debug
cp -a $PKG/lib${LIBDIRSUFFIX}/l*.so* $PKG/usr/lib${LIBDIRSUFFIX}/debug
cp -a $PKG/usr/lib${LIBDIRSUFFIX}/*.a $PKG/usr/lib${LIBDIRSUFFIX}/debug
# Don't need debug+profile:
( cd $PKG/usr/lib${LIBDIRSUFFIX}/debug ; rm -f *_p.* )
# NOTE:  Is there really a reason for the glibc-debug package?
# If you're debugging glibc, you can also compile it, right?

## COMMENTED OUT:  There's no reason for profile libs to include -g information.
## Put back unstripped profiling libraries:
#mv $PKG/usr/lib${LIBDIRSUFFIX}/debug/*_p.a $PKG/usr/lib${LIBDIRSUFFIX}
# It might be best to put the unstripped and profiling libraries in glibc-debug and glibc-profile.

# I don't think "strip -g" causes the pthread problems.  It's --strip-unneeded that does.
strip -g $PKG/lib${LIBDIRSUFFIX}/l*.so*
strip -g $PKG/usr/lib${LIBDIRSUFFIX}/l*.so*
strip -g $PKG/usr/lib${LIBDIRSUFFIX}/lib*.a

# Remove the rquota.x and rquota.h include files, as they are provided by
# the quota package:
rm -f $PKG/usr/include/rpcsvc/rquota.{h,x}

# Back to the sources dir to add some files/docs:
cd $TMP/glibc-$CVSVER

# We'll automatically install the config file for the Name Server Cache Daemon.
# Perhaps this should also have some commented-out startup code in rc.inet2...
mkdir -p $PKG/etc
cat nscd/nscd.conf > $PKG/etc/nscd.conf.new

# Install docs:
( mkdir -p $PKG/usr/doc/glibc-$VERSION
  cp -a \
    CONTRIBUTED-BY* COPYING* INSTALL* LICENSES* MAINTAINERS* NEWS* README* SECURITY* SHARED-FILES* \
    $PKG/usr/doc/glibc-$VERSION
)

# Trim the NEWS file to omit ancient history:
if [ -r NEWS ]; then
  DOCSDIR=$(echo $PKG/usr/doc/glibc-$VERSION)
  cat NEWS | head -n 1000 > $DOCSDIR/NEWS
  touch -r NEWS $DOCSDIR/NEWS
fi

# OK, there are some very old Linux standards that say that any binaries in a /bin or
# /sbin directory (and the directories themselves) should be group bin rather than
# group root, unless a specific group is really needed for some reason.
#
# I can't find any mention of this in more recent standards docs, and always thought
# that it was pretty cosmetic anyway (hey, if there's a reason -- fill me in!), so
# it's possible that this ownership change won't be followed in the near future
# (it's a PITA, and causes many bug reports when the perms change is occasionally
# forgotten).
#
# But, it's hard to get me to break old habits, so we'll continue the tradition here:
#
# No, no we won't.  You know how we love to break traditions.

# Strip most binaries:
( cd $PKG
  find . | xargs file | grep "executable" | grep ELF | cut -f 1 -d : | xargs strip --strip-debug 2> /dev/null
  find . | xargs file | grep "shared object" | grep ELF | cut -f 1 -d : | xargs strip -g 2> /dev/null
)

# Compress manual pages:
find $PKG/usr/man -type f -exec gzip -9 {} \+
for i in $( find $PKG/usr/man -type l ) ; do
  ln -s $( readlink $i ).gz $i.gz
  rm $i
done

# Compress info files, if any:
if [ -d $PKG/usr/info ]; then
  ( cd $PKG/usr/info
    rm -f dir
    gzip -9 *
  )
fi

# This is junk
rm $PKG/etc/ld.so.cache
( cd $PKG
  find . -name "*.orig" -exec rm {} \+
)

##################################
# OK, time to make some packages #
##################################

# glibc-profile:
cd $PPROFILE
mkdir -p usr/lib${LIBDIRSUFFIX}
# Might as well just grab these with 'mv' to simplify things later:
mv $PKG/usr/lib${LIBDIRSUFFIX}/lib*_p.a usr/lib${LIBDIRSUFFIX}
# Profile libs should be stripped.  Use the debug libs to debug...
( cd usr/lib${LIBDIRSUFFIX} ; strip -g *.a )
mkdir install
cp -a $CWD/slack-desc.glibc-profile install/slack-desc
makepkg -l y -c n $TMP/glibc-profile-$VERSION-$SLACKWARE_ARCH-$BUILD.txz

# THIS IS NO LONGER PACKAGED (or is it?  might be better to let it be made, and then ship it or not...)
# glibc-debug:
cd $PDEBUG
mkdir -p usr/lib${LIBDIRSUFFIX}
# Might as well just grab these with 'mv' to simplify things later:
mv $PKG/usr/lib${LIBDIRSUFFIX}/debug usr/lib${LIBDIRSUFFIX}
mkdir install
cp -a $CWD/slack-desc.glibc-debug install/slack-desc
## Don't package this:
#makepkg -l y -c n $TMP/glibc-debug-$VERSION-$SLACKWARE_ARCH-$BUILD.txz
## INSTEAD, NUKE THESE LIBS
#rm -rf $PKG/usr/lib${LIBDIRSUFFIX}/debug

# glibc-i18n:
cd $PI18N
mkdir -p usr/lib${LIBDIRSUFFIX}/locale
mv $PKG/usr/lib${LIBDIRSUFFIX}/locale/* usr/lib${LIBDIRSUFFIX}/locale
mkdir -p usr/share/{i18n,locale}
mv $PKG/usr/share/i18n/* usr/share/i18n
mv $PKG/usr/share/locale/* usr/share/locale
# Leave copies of the C, POSIX, and en_US locales in the main glibc package:
cp -a usr/lib${LIBDIRSUFFIX}/locale/{C,en_US}* $PKG/usr/lib${LIBDIRSUFFIX}/locale
mkdir -p $PKG/usr/share/i18n/locales
cp -a usr/share/i18n/locales/{C,POSIX,en_US} $PKG/usr/share/i18n/locales
mkdir install
cp -a $CWD/slack-desc.glibc-i18n install/slack-desc
makepkg -l y -c n $TMP/glibc-i18n-$VERSION-$SLACKWARE_ARCH-$BUILD.txz

# aaa_glibc-solibs:
cd $PSOLIBS
mkdir -p etc/profile.d
cp -a $CWD/profile.d/* etc/profile.d
chown -R root:root etc
chmod 755 etc/profile.d/*
mkdir -p lib${LIBDIRSUFFIX}
cp -a $PKG/lib${LIBDIRSUFFIX}/* lib${LIBDIRSUFFIX}
( cd lib${LIBDIRSUFFIX}
  mkdir incoming
  mv *so* incoming
  mv incoming/libmemusage.so .
  # Beginning with glibc-2.34, shared objects are using their ABI sonames
  # directly, which is frankly, a terrible idea. It might help other package
  # managers, but doesn't do us any favors where we already had a system for
  # dealing with upgrades (and downgrades!). We'll change these libraries to
  # use the versioned naming system of glibc-2.33 and earlier so that we don't
  # have to handle these files differently and so that it's easy to see what
  # version of glibc is in use at a glance.
  cd incoming
  # First do the new libxcrypt links (a little bit differently):
  for cryptlib in libcrypt.so.* ; do
    CRYPTSO=$(echo $cryptlib | cut -f 3 -d .)
    mv $cryptlib libcrypt${CRYPTSO}-${VERSION}.so
  done
  for library in *.so.* ; do
    mv $library $(echo $library | cut -f 1 -d .)-${VERSION}.so
  done
  # This one is a special case. We don't want an $ARCH embedded in the
  # filename. It prevents using the same install scripts on all $ARCH
  # and does no good since we'll never have multiple $ARCH libraries
  # installed in the same directory anyway. So give it the previous name
  # format:
  mv ld-linux*-${VERSION}.so ld-${VERSION}.so
)
mkdir -p usr
cp -a $PKG/usr/bin usr
mv usr/bin/ldd .
rm usr/bin/*
mv ldd usr/bin
mkdir -p usr/lib${LIBDIRSUFFIX}
# The gconv directory has a lot of stuff, but including it here will save some problems.
# Seems standard elsewhere.
cp -a $PKG/usr/lib${LIBDIRSUFFIX}/gconv usr/lib${LIBDIRSUFFIX}
mkdir -p usr/libexec
cp -a $PKG/usr/libexec/pt_chown usr/libexec
# Same usr.bin deal:
cp -a $PKG/sbin .
mv sbin/ldconfig .
rm sbin/*
mv ldconfig sbin
mkdir install
cp -a $CWD/slack-desc.aaa_glibc-solibs install/slack-desc
cp -a $CWD/doinst.sh-aaa_glibc-solibs install/doinst.sh
# Fix specific versioning for the symlink creation script. This part of the
# script would only be used in the case where there is no ldconfig on the
# running system that's used to install the package. That should never be the
# case, but we'll leave the code in place anyway just in case.
sed -i "s/@@VERSION@@/$VERSION/g" install/doinst.sh
# Call the function to fix doinst.sh where $LIBDIRSUFFIX is needed:
fix_doinst
# Only scrub the links in /lib{,64} that will be created by ldconfig:
find lib${LIBDIRSUFFIX} -type l -exec rm {} \+
# Build the package:
makepkg -l y -c n $TMP/aaa_glibc-solibs-$VERSION-$SLACKWARE_ARCH-$BUILD.txz

# And finally, the complete "all-in-one" glibc package is created
# from whatever was leftover:
cd $PGLIBC
mv $PKG/* .
mkdir -p etc/profile.d
cp -a $CWD/profile.d/* etc/profile.d
chown -R root:root etc
chmod 755 etc/profile.d/*
# Only scrub the links in /lib{,64} that will be created by ldconfig:
find lib${LIBDIRSUFFIX} -type l -exec rm {} \+
mkdir install
cp -a $CWD/slack-desc.glibc install/slack-desc
cp -a $CWD/doinst.sh-glibc install/doinst.sh
# Fix specific versioning for the symlink creation script. This part of the
# script would only be used in the case where there is no ldconfig on the
# running system that's used to install the package. That should never be the
# case, but we'll leave the code in place anyway just in case.
sed -i "s/@@VERSION@@/$VERSION/g" install/doinst.sh
# Call the function to fix doinst.sh where $LIBDIRSUFFIX is needed:
fix_doinst
( cd lib${LIBDIRSUFFIX}
  mkdir incoming
  mv *so* incoming
  mv incoming/libmemusage.so .
  # Beginning with glibc-2.34, shared objects are using their ABI sonames
  # directly, which is frankly, a terrible idea. It might help other package
  # managers, but doesn't do us any favors where we already had a system for
  # dealing with upgrades (and downgrades!). We'll change these libraries to
  # use the versioned naming system of glibc-2.33 and earlier so that we don't
  # have to handle these files differently and so that it's easy to see what
  # version of glibc is in use at a glance.
  cd incoming
  # First do the new libxcrypt links (a little bit differently):
  for cryptlib in libcrypt.so.* ; do
    CRYPTSO=$(echo $cryptlib | cut -f 3 -d .)
    mv $cryptlib libcrypt${CRYPTSO}-${VERSION}.so
  done
  for library in *.so.* ; do
    mv $library $(echo $library | cut -f 1 -d .)-${VERSION}.so
  done
  # This one is a special case. We don't want an $ARCH embedded in the
  # filename. It prevents using the same install scripts on all $ARCH
  # and does no good since we'll never have multiple $ARCH libraries
  # installed in the same directory anyway. So give it the previous name
  # format:
  mv ld-linux*-${VERSION}.so ld-${VERSION}.so
)
# Build the package:
/sbin/makepkg -l y -c n $TMP/glibc-$VERSION-$SLACKWARE_ARCH-$BUILD.txz

# Done!
echo
echo "glibc packages built in $TMP!"