#!/bin/bash

# Copyright 2006, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016  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.
#
#
# Modified by Stuart Winter for Slackware ARM.
#

# Record toolchain & other info for the build log:
slackbuildinfo

# Paths to skeleton port's source & real Slackware source tree:
export CWD=$SLACKSOURCE/$PKGSERIES/$PKGNAM
export PORTCWD=$PWD

# Determine the CFLAGS for the known architectures:
# Note that we're overriding the defaults in the slackdev config as we use -O3.
case $ARCH in
   arm)       SLKCFLAGS="-march=armv5te -pipe -g -O3 -fno-strict-aliasing -mfloat-abi=soft" ### -U_FORTIFY_SOURCE
              # -U_FORTIFY_SOURCE was added to fix this problem:
              # http://sourceware.org/ml/libc-help/2009-02/msg00023.html
              ARCH_CONFARGS="--without-selinux"
              LIBDIRSUFFIX=""
              ;;
esac

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

# Version of the Linux Kernel headers that we'll be compiling with:
# These headers are not found in /usr/src/linux but are explicitley extraced
# from the d/kernel-headers package and glibc is configured to compile against
# them.  This was because in days of old, glibc would often not compile against
# the headers of the newest Kernel we were running and required a previous release.
# This isn't usually the case in 2012, but it's still far easier to build against an
# older set of Kernel headers - especially when just rebuilding glibc rather than
# upgrading (usually an upgrade works with a newer set of Kernel headers).
# Linux 3.x always has a three digit version - e.g. 3.2.1
KERNELHEADERS=4.4.14

# This function fixes a doinst.sh file for x86_64.
# With thanks to Fred Emmott.
fix_doinst() {

  # ARM uses .so.3:
  sed -i 's?ld-linux.so.[0-9]?'"$ARMLDLINUXVER"'?g' install/doinst.sh

  if [ "x$LIBDIRSUFFIX" = "x" ]; then
    return;
  fi;
  # Fix "( cd usr/lib${LIBDIRSUFFIX} ;" 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

}

# Extract the source:
function extractglibcsource () {
  cd $TMPBUILD
  rm -rf glibc*

  # Unpack the main from the Slackware source tree:
  echo "Unpacking main glibc source..."
  tar xf $CWD/glibc-$VERSION.tar.xz \
    || tar xf $CWD/glibc-$VERSION.tar.bz2 \
    || tar xf $CWD/glibc-$VERSION.tar.gz
  cd glibc-$VERSION* || exit 1

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

  # Apply Slackware-specific patches (taken from glibc.SlackBuild):
  #
  #
  # 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
  # The is_IS locale is causing a strange error about the "echn" command
  # not existing.  This patch reverts is_IS to the version shipped in
  # glibc-2.5:
  zcat $CWD/is_IS.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
  # Fix resolver problem with glibc-2.9:
  zcat $CWD/glibc-2.10-dns-no-gethostbyname4.diff.gz | patch -p0 --verbose || exit 1
  # This reverts a patch that was made to glibc to fix "namespace leakage",
  # which seems to cause some build failures (e.g. with conntrack):
  zcat $CWD/glibc.revert.to.fix.build.breakages.diff.gz | patch -p1 -l --verbose || exit 1
  # Make it harder for people to trick ldd into running code:
  zcat $CWD/glibc.ldd.trace.through.dynamic.linker.diff.gz | patch -p1 --verbose || exit 1
  # Add a C.UTF-8 locale:
  zcat $CWD/glibc-c-utf8-locale.patch.gz | patch -p1 --verbose || exit 1

  ###############################################################################################
  # Slackware ARM patches
  # This is a mixture of patches taken from Debian/Ubuntu and Gentoo.
  # For different builds of glibc, we often have to take some patches from a few distributions
  # in order to get a working build (although usually only if we're using a different version of
  # glibc than the other distributions), so we leave the code commented out as we'll need to use
  # it sooner or later!
  ###############################################################################################

  # Apply Debian/Ubuntu's ARM patches:
  tar xvvf $PORTCWD/sources/glibc*.tar.xz || exit 1
  # Wipe a few since these are for glibc 2.16 are are Debian specific:
  #rm -f debian/patches/arm/{local-soname-hack.diff,local-atomic.diff,cvs-ldconfig-cache-abi.diff,unsubmitted-ldconfig-cache-abi.diff,unsubmitted-armhf-linker.diff}

  # Apply:
  for pf in \
     arm/local-sigaction.diff \
     arm/unsubmitted-ldconfig-cache-abi.diff \
     arm/unsubmitted-ldso-abi-check.diff \
     arm/local-vfp-sysdeps.diff \
     arm/unsubmitted-ldso-multilib.diff \
     arm/local-arm-futex.diff \
     ; do
      auto_apply_patch debian/patches/$pf || exit 1
    done

  #for i in debian/patches/arm/*diff ; do
  #  auto_apply_patch $i || exit 1
  #done
  #

  # Determine version of ld-linux.so
  export ARMLDLINUXVER="$( grep -A1 "soft-float ABI" sysdeps/unix/sysv/linux/arm/shlib-versions | egrep "^ld=" | awk -F= '{print $2}' )"
  #export ARMLDLINUXVER="$( grep -A1 "hard-float ABI" sysdeps/unix/sysv/linux/arm/shlib-versions | egrep "^ld=" | awk -F= '{print $2}' )"
  if [ -z "ARMLDLINUXVER" ]; then
     echo "Unable to determine version of ld-linux.so required for the package doinst.sh"
     exit 1
   else
     echo "** Found version of ld-linux: $ARMLDLINUXVER **"
  fi

  # Clean up CVS mess:
  find . -type d -name CVS -print0 | xargs -0 rm -rf

  # Ensure permissions & ownerships:
  slackhousekeeping

  # Create a separate build directory:
  mkdir -vpm755 build_dir
  cd build_dir
}


# Temporary build locations:
export TMPBUILD=$TMP/build-$PKGNAM
# This is the initial $DESTDIR:
export PKG=$TMP/package-glibc-incoming-tree
mkpkgdirs # Delete & re-create temporary directories then cd into $TMPBUILD

# Then we'll compile the following packages from it:
PGLIBC=$TMP/package-glibc
PSOLIBS=$TMP/package-glibc-solibs
PI18N=$TMP/package-glibc-i18n
PPROFILE=$TMP/package-glibc-profile
PDEBUG=$TMP/package-glibc-debug

# Empty & create these locations first:
for dir in $PKG $PGLIBC $PSOLIBS $PZONE $PI18N $PPROFILE $PDEBUG ; do
    rm -rf $dir
    mkdir -vpm755 $dir
done

# Create an incoming directory structure for glibc to be built into:
mkdir -vpm755 $PKG/{var/{run/nscd,db/nscd},lib${LIBDIRSUFFIX},sbin,usr/{bin,lib${LIBDIRSUFFIX},sbin,include,doc,man,share}}

# Extract our pre-made Linux Kernel include files.
# All I did for these was extract the source, copy the config file in place and
# run make oldconfig, then tar up the include dir.
#
mkdir -vpm755 $TMPBUILD/kernelheaders/
echo "Extracting Linux Kernel headers into $TMPBUILD"
# We keep these in the d/ series.
tar xf $PORTCWD/../../d/kernel-headers/sources/kernel-headers-${KERNELHEADERS}.tar.xz -C $TMPBUILD/kernelheaders/ || exit 1

################# Build glibc #############################
echo "[**] Building NPTL version of glibc [**]"

# Extract, patch the source & cd into the build dir:
extractglibcsource || exit 1

# Configure:
# Note: the --enable-kernel option tells glibc which obsolete options to
# compile *INTO* glibc, not what to compile out!!
# See http://www.mail-archive.com/lfs-dev@linuxfromscratch.org/msg11060.html
# To see what'd be compiled in for the older versions, look at:
# glibc-2.9/sysdeps/unix/sysv/linux/kernel-features.h

# Slackware uses this, but Slackware ARM still keeps a copy of the headers
# in the source tree which we extract whenever we build glibc.
#  --with-headers=/usr/include \

# Make build directory:
AUTOCONF=false \
CFLAGS="$SLKCFLAGS" \
../configure $ARCH_CONFARGS \
   --prefix=/usr \
   --infodir=/usr/info \
   --mandir=/usr/man \
   --libdir=/usr/lib${LIBDIRSUFFIX} \
   --enable-kernel=2.6.32 \
   --with-headers=$TMPBUILD/kernelheaders/include \
   --enable-obsolete-rpc \
   --enable-profile \
   --with-tls \
   --with-__thread \
   --without-cvs \
   --disable-werror \
   --build=$SLACKWARE_ARCH-slackware-linux-gnueabi \
   --host=$SLACKWARE_ARCH-slackware-linux-gnueabi \
   --target=$SLACKWARE_ARCH-slackware-linux-gnueabi || failconfig
#   --enable-add-ons=libidn,nptl,ports \

# Build:
make-3.81 PARALLELMFLAGS="$NUMJOBS" || make-3.81 || exit 1

# Install into local package:
make-3.81 install install_root=$PKG || failinstall
make-3.81 localedata/install-locales install_root=$PKG || failinstall

# The prevailing standard seems to be putting unstripped libraries in
# /usr/lib/debug/ and stripping the debugging symbols from all the other
# libraries.
mkdir -vpm755 $PKG/usr/lib${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 -fv $PKG/usr/include/rpcsvc/rquota.{h,x}

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

# 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 -vpm755 $PKG/etc
cat nscd/nscd.conf > $PKG/etc/nscd.conf.new

# Install docs:
( mkdir -vpm755 $PKG/usr/doc/glibc-$VERSION
  cp -favv \
    BUGS CONFORMANCE COPYING* FAQ INSTALL LICENSES NAMESPACE \
    NEWS NOTES PROJECTS README* \
    $PKG/usr/doc/glibc-$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

# Start fakeroot server:
start_fakeroot

# Slackware policy:
( cd $PKG
  # root:root
  slackchown

  # 644 docs:
  slack644docs

  # Strip most binaries:
  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

  # gzip man & info pages:
  slackgzpages -i

  # This is junk
  rm -f etc/ld.so.cache
  find . -name "*.orig" -exec rm -f {} \;

  # These contain scratchbox paths when built inside sbox:
  sed -i '1s/.*/#!\/bin\/bash/' usr/bin/xtrace usr/bin/tzselect )

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

# Delete old package versions?
if [ "${DELETEOLDPKGS}" = "Yes" ]; then
   rm -fv $PKGSTORE/a/glibc-solibs*
   rm -fv $PKGSTORE/l/glibc-*
   rm -fv $PKGSTORE/l/glibc-{debug,profile}*
#   rm -f $PKGSTORE/../extra/glibc-extra-packages/glibc-{debug,profile}*
fi

# glibc-profile:
mkdir -vpm755 $PPROFILE/usr/lib${LIBDIRSUFFIX}
cd $PPROFILE
# Might as well just grab these with 'mv' to simplify things later:
mv $PKG/usr/lib${LIBDIRSUFFIX}/lib*_p.a usr/lib
# Profile libs should be stripped.  Use the debug libs to debug...
( cd usr/lib${LIBDIRSUFFIX} ; strip -g *.a )
mkdir -vpm755 install
install -vpm644 -oroot -groot $CWD/slack-desc.glibc-profile install/slack-desc
#makepkg -l y -c n $PKGSTORE/../extra/glibc-extra-packages/glibc-profile-$VERSION-$PKGARCH-$BUILD.txz
makepkg -l y -c n $PKGSTORE/l/glibc-profile-$VERSION-$PKGARCH-$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 $PDEBUG
mkdir -vpm755 usr/lib${LIBDIRSUFFIX}
# Might as well just grab these with 'mv' to simplify things later:
mv $PKG/usr/lib/debug usr/lib
mkdir -vpm755 install
install -m644 -oroot -groot $CWD/slack-desc.glibc-debug install/slack-desc
makepkg -l y -c n $TMPBUILD/glibc-debug-$VERSION-$PKGARCH-$BUILD.txz
## INSTEAD, NUKE THESE LIBS
#rm -rf $PKG/usr/lib${LIBDIRSUFFIX}/debug
#makepkg -l y -c n $PKGSTORE/../extra/glibc-extra-packages/glibc-debug-$VERSION-$PKGARCH-$BUILD.txz

# 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 -vpm755 install
install -m644 -oroot -groot $CWD/slack-desc.glibc-i18n install/slack-desc
makepkg -l y -c n $PKGSTORE/l/glibc-i18n-$VERSION-$PKGARCH-$BUILD.txz

# glibc-solibs:
cd $PSOLIBS
mkdir -vpm755 etc/profile.d
cp -a $CWD/profile.d/* etc/profile.d
chown -R root:root etc
chmod 755 etc/profile.d/*
mkdir -vpm755 lib
cp -a $PKG/lib${LIBDIRSUFFIX}/* lib
( cd lib
  mkdir -vpm755 incoming
  mv *so* incoming
  mv incoming/libSegFault.so .
)
mkdir -vpm755 usr
cp -a $PKG/usr/bin usr
mv usr/bin/ldd .
rm usr/bin/*
mv ldd usr/bin
mkdir -vpm755 usr/lib${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 -vpm755 usr/libexec
cp -a $PKG/usr/libexec/pt_chown usr/libexec
cp -a $PKG/sbin .
mv sbin/ldconfig .
rm sbin/*
mv ldconfig sbin
mkdir -vpm755 install
install -vpm644 -oroot -groot $CWD/slack-desc.glibc-solibs install/slack-desc
install -vpm644 -oroot -groot $CWD/doinst.sh-glibc-solibs install/doinst.sh
fix_doinst
sed -i "s/@@VERSION@@/$VERSION/g" install/doinst.sh
#
# Ditch links:
find . -type l -exec rm {} \;
#
# Build the package:
makepkg -l y -c n $PKGSTORE/a/glibc-solibs-$VERSION-$PKGARCH-$BUILD.txz

# And finally, the complete "all-in-one" glibc package is created
# from whatever was leftover:
cd $PGLIBC
mv $PKG/* .
mkdir -vpm755 etc/profile.d
cp -a $CWD/profile.d/* etc/profile.d
chown -R root:root etc
chmod 755 etc/profile.d/*
# Ditch links (these are in doinst.sh-glibc):
find . -type l -exec rm {} \;
mkdir -vpm755 install
install -vpm644 -oroot -groot $CWD/slack-desc.glibc install/slack-desc
install -vpm644 -oroot -groot $CWD/doinst.sh-glibc install/doinst.sh
fix_doinst
sed -i "s/@@VERSION@@/$VERSION/g" install/doinst.sh
( cd lib
  mkdir -vpm755 incoming
  mv *so* incoming
  mv incoming/libSegFault.so .
)
# Build the package:
makepkg -l y -c n $PKGSTORE/l/glibc-$VERSION-$PKGARCH-$BUILD.txz

# Done!