#!/bin/bash

# Slackware build script for FreeBASIC

# Copyright 2014-2019  Dimitris Zlatanidis  Orestiada, Greece
# 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.

# 20201224 bkw: BUILD=3, fixed, for real this time. I think. BUILD=2
# version worked only if fbc was already installed :(

# 20201211 bkw: modified by SlackBuilds.org, to build FreeBASIC from source
# instead of using prebuilt binary packages. There are various reasons for
# wanting to do this:

# - The prebuilt binaries were built on an OS where the terminfo fuctions
#   from ncurses were split into a separate library (libtinfo). Using
#   the binary package on Slackware 14.2 means creating a libtinfo
#   symlink in /usr/lib64, which can cause problems later (e.g. if
#   something else links with it, no harm done... until you removepkg
#   FreeBASIC). Also, there are reports on the mailing list of fbc
#   being unable to compile FreeBASIC code that uses curses, even with
#   the symlink in place. Building it on our OS prevents this issue.
#   The folks on the mailing list "solved" this problem by reverting to
#   the FreeBASIC version from the 14.0 repo, which is what prompted
#   me to fix this build...

# - In the same vein, the prebuilt binaries have /usr/lib/freebasic hardcoded,
#   so there had to be a symlink to lib64 on Slackware64.

# - General paranoia about trusting prebuilt binaries.

# - If we build it, we get FreeBASIC bindings for various libraries that
#   are installed, e.g. mysql and libart_lgpl.

# - I was hoping that compiling from source would fix a couple other
#   problems. The sdl2-hello example segfaults with both the prebuilt
#   and built-from-source fbc :(

PRGNAM=FreeBASIC
VERSION=${VERSION:-1.07.1}
BUILD=${BUILD:-3}
TAG=${TAG:-_SBo}

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

CWD=$(pwd)
TMP=${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

SRCVER=$VERSION-source-bootstrap

rm -rf $PKG
mkdir -p $TMP $PKG $OUTPUT
cd $TMP
rm -rf $PRGNAM-$SRCVER
tar xvf $CWD/$PRGNAM-$SRCVER.tar.xz
cd $PRGNAM-$SRCVER
chown -R root:root .
find -L .  -perm /111 -a \! -perm 755 -a -exec chmod 755 {} \+ -o \
        \! -perm /111 -a \! -perm 644 -a -exec chmod 644 {} \+

[ "$LIBDIRSUFFIX" = "64" ] && extra="ENABLE_LIB64=1"

# This is interesting: we have "precompiled sources", which means
# FreeBASIC source that was 'compiled' to C source. So to bootstrap
# fbc, we first build the precompiled C to make a minimal fbc binary,
# then use that to build the real fbc from the FreeBASIC sources.
make bootstrap

FBC="$( pwd )/bootstrap/fbc"
FBFLAGS="-i $( pwd )/inc"

# fbdoc needs its own FBFLAGS. Loosely based on a patch from ponce.
sed -i -e 's,\<FBFLAGS\>,XFBFLAGS,g' \
       -e 's,\$(XFBFLAGS),$(FBFLAGS) &,' \
    doc/fbdoc/makefile

# multiple make commands, with mostly the same args
run_make() {
  make \
    V=1 \
    FBC="$FBC" \
    FBFLAGS="$FBFLAGS" \
    prefix=/usr \
    ENABLE_STRIPALL=1 \
    INSTALL_PROGRAM="install -s" \
    DESTDIR=$PKG \
    $extra \
    "$@"
}

run_make
run_make install

# Build and install the manual.
run_make -C doc/libfbdoc
run_make -C doc/fbdoc
run_make -C doc/manual html/DocToc.html txt/fbdoc.txt

mkdir -p $PKG/usr/man/man1
gzip -9c < doc/fbc.1 > $PKG/usr/man/man1/fbc.1.gz

# zero length files...
find examples/ -name deleteme.txt -exec rm {} +

mkdir -p $PKG/usr/doc/$PRGNAM-$VERSION
cp -a doc/*.txt doc/manual/txt/ doc/manual/html/ examples/ \
      $PKG/usr/doc/$PRGNAM-$VERSION
cat $CWD/$PRGNAM.SlackBuild > $PKG/usr/doc/$PRGNAM-$VERSION/$PRGNAM.SlackBuild

ln -s DocToc.html $PKG/usr/doc/$PRGNAM-$VERSION/html/index.html

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

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