#!/bin/bash

# Slackware build script for z88dk

# Written by B. Watson (yalhcru@gmail.com)

# Licensed under the WTFPL. See http://www.wtfpl.net/txt/copying/ for details.

# TODO: someday include the zsdcc stuff. Probably sometime after z88dk's
# 2.0 release. If no 2.0 release exists by, say, the start of 2019, I'll
# probably change this build so it works with a git snapshot instead
# of a release. I'll admit, my motivation for that will be that I want
# to have a C compiler that targets Pac-Man arcade hardware (the 1.99B
# release doesn't, current git does).

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

PRGNAM=z88dk
VERSION=${VERSION:-1.99B}
BUILD=${BUILD:-1}
TAG=${TAG:-_SBo}
PKGTYPE=${PKGTYPE:-tgz}

if [ -z "$ARCH" ]; then
  case "$( uname -m )" in
    i?86) ARCH=i586 ;;
    arm*) ARCH=arm ;;
       *) 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 "${PRINT_PACKAGE_NAME}" ]; then
  echo "$PRGNAM-$VERSION-$ARCH-$BUILD$TAG.$PKGTYPE"
  exit 0
fi

TMP=${TMP:-/tmp/SBo}
PKG=$TMP/package-$PRGNAM
OUTPUT=${OUTPUT:-/tmp}

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="64"
else
  SLKCFLAGS="-O2"
  LIBDIRSUFFIX=""
fi

set -e

rm -rf $PKG
mkdir -p $TMP $PKG $OUTPUT
cd $TMP
rm -rf $PRGNAM
unzip $CWD/$PRGNAM-src-$VERSION.zip
cd $PRGNAM

# Upstream permissions are bad. Please don't replace with "find . -L
# ..." boilerplate.
find . -name CVS -print0 | xargs -0 rm -rf
find . -type f   -print0 | xargs -0 chmod 0644
find . -type d   -print0 | xargs -0 chmod 0755
chmod +x *.sh

# Sneaky ways to inject CFLAGS.
sed -i "s/CC=gcc/CC='gcc $SLKCFLAGS'/" build.sh
export CXX="g++ $SLKCFLAGS"

# Default prefix.
sed -i "s,/usr/local,/usr," Makefile

# Upstream seems to be in the middle of migrating from /usr/lib to
# /usr/share or vice versa. The compiler looks for stuff in lib that's
# actually installed to share, if I don't do this:
sed -i '/^prefix_share/s,/share,/lib,' Makefile

# Note to well-intentioned maintainers: please don't try to move
# this stuff to /usr/lib64 on 64-bit systems. There's no native code
# (no ELF executables, no shared or static libraries full of x86_64
# code). Everthing in /usr/lib/z88dk is either headers, source, or
# z88dk's own .lib format for z80 object code. From Linux's point
# of view, it's just data. It's no different from Pat keeping udev
# rules in /lib/udev on 64-bit.

# Parallel make of the compiler itself works OK, but not of the
# z80 native libraries.
sed -i '/^\$MAKE *-e/aexport MAKEFLAGS="-j1"' build.sh

./build.sh

# install-libs doesn't seem to support DESTDIR.
make install prefix=$PKG/usr
make install-libs prefix=$PKG/usr

# 'make install' doesn't install everything the compiler needs...
# Trying to build the examples I got "sh: zpragma: command not found".
cp -a bin/* $PKG/usr/bin/

# strip strips everything but chokes on the perl script.
strip $PKG/usr/bin/* 2>/dev/null || true

# man pages from Debian:
# http://http.debian.net/debian/pool/main/z/z88dk/z88dk_1.8.ds1-10.debian.tar.gz
# They're for an older version of z88dk, and there's not a complete
# set of them, but it's better than nothing I hope.
mkdir -p $PKG/usr/man/man1
for i in $CWD/man/*.1; do
  gzip -9c < $i > $PKG/usr/man/man1/$( basename $i ).gz
done

mkdir -p $PKG/usr/doc/$PRGNAM-$VERSION
cp -a README* LICENSE EXTENSIONS doc examples support \
      $PKG/usr/doc/$PRGNAM-$VERSION
cat $CWD/$PRGNAM.SlackBuild > $PKG/usr/doc/$PRGNAM-$VERSION/$PRGNAM.SlackBuild

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

cd $PKG
/sbin/makepkg -l y -c n $OUTPUT/$PRGNAM-$VERSION-$ARCH-$BUILD$TAG.$PKGTYPE