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#!/bin/bash

# Slackware build script for pcc (Portable C Compiler)

# Originally written by Armin Besirovic <armin[at]linux[dot]org[dot]ba>

# Modified by B. Watson <yalhcru@gmail.com>

# 20141031 bkw:
# - took over maintentance.
# - upgraded for 1.1.0 beta series.
# - combined pcc and pcc-libs into one build, since either one is
#   useless without the other.
# - removed pcc-lib's 002-build-libpcc-with-pcc.patch as it's been
#   applied upstream in the 1.1.0 branch.
# - use private /usr/libexec/pcc/ dir instead of installing stuff
#   directly in /usr/libexec. Probably just paranoia.
# - rename cpp-pcc man page to pcpp, since the beta installs a
#   /usr/bin/pcpp.
# - get rid of -j1 in make command, seems to no longer be needed.
# - add logic to choose which compiler to use if CC not set.
# - extract license from source, install to /usr/doc

# 20150126 bkw:
# - upgraded for pcc-1.1.0 release, no more beta
# - add seddery to fix typo in cc.c (ifdef => ifndef)

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

PRGNAM=pcc
VERSION=${VERSION:-1.1.0}
BUILD=${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}

# non-standard stanza here: we're not going to use -march= or -mtune=
# on 32-bit Slackware, because doing so prevents pcc from being used
# to compile itself. I could add logic to use those flags only if
# CC is gcc, but the extra complexity isn't worth the dubious benefit.
SLKCFLAGS="-O2 -fPIC"
if [ "$ARCH" = "x86_64" ]; then
  LIBDIRSUFFIX="64"
else
  LIBDIRSUFFIX=""
fi

set -e

# which compiler shall we use?
if [ "$CC" = "" ]; then
  # user didn't specify, autodetect.
  if pcc --version &>/dev/null; then
    CC=pcc
  elif gcc --version &>/dev/null; then
    CC=gcc
  elif clang --version &>/dev/null; then
    CC=clang
  else
    echo "Can't find any of pcc, gcc, or clang in \$PATH. Giving up." 1>&2
  fi
fi

export CC
WITHCC="$( basename $CC )"
[ "$CC" = "pcc" ] && WITHCC="pcc itself"

# enable TLS? upstream disables it by default.
TLSOPT="--disable-tls"
if [ "${TLS:-no}" = "yes" ]; then
  TLSOPT="--enable-tls"
fi

rm -rf $PKG $TMP/$PRGNAM
mkdir -p $TMP/$PRGNAM $PKG $OUTPUT
cd $TMP/$PRGNAM
tar xvf $CWD/$PRGNAM-$VERSION.tgz
tar xvf $CWD/$PRGNAM-libs-$VERSION.tgz
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 {} \;

# first, the compiler itself:
cd $PRGNAM-$VERSION

# fix typo, ref http://marc.info/?l=pcc-list&m=141824411830017&w=2
sed -i '0,/^#ifdef MULTI/!s,^#ifdef \(MULTI\),#ifndef \1,' cc/cc/cc.c

CFLAGS="$SLKCFLAGS" \
CXXFLAGS="$SLKCFLAGS" \
./configure \
  $TLSOPT \
  --prefix=/usr \
  --mandir=/usr/man \
  --libdir=/usr/lib${LIBDIRSUFFIX} \
  --libexecdir=/usr/libexec/$PRGNAM \
  --build=$ARCH-slackware-linux

# no install-strip, but binaries are already stripped by default.
make
make install DESTDIR=$PKG

gzip -9 $PKG/usr/man/man?/*.?
# Don't overwrite Slackware's man page.
mv $PKG/usr/man/man1/cpp.1.gz $PKG/usr/man/man1/pcpp.1.gz

# why are there no docs in the @##!$^ tarball?!
mkdir -p $PKG/usr/doc/$PRGNAM-$VERSION
cat $CWD/$PRGNAM.SlackBuild > $PKG/usr/doc/$PRGNAM-$VERSION/$PRGNAM.SlackBuild

# license is BSD-style, in comments in the code.
sed -n '/Copyright/,/^ *$/s,^...,,p' cc/cc/cc.c \
  > $PKG/usr/doc/$PRGNAM-$VERSION/LICENSE

# now, build the libs. we don't attempt to build them with the just-built
# pcc (maybe possible, but not worth the effort).
cd $TMP/$PRGNAM/$PRGNAM-libs-$VERSION

CFLAGS="$SLKCFLAGS" \
CXXFLAGS="$SLKCFLAGS" \
./configure \
  --prefix=/usr \
  --libdir=/usr/lib${LIBDIRSUFFIX} \
  --build=$ARCH-slackware-linux

# pcc-libs installs nothing we can strip.
make
make install DESTDIR=$PKG

# there is a bit of documentation included with pcc-libs, but nothing
# really relevant unless you're hacking on pcc itself, not gonna bother.

mkdir -p $PKG/install
sed -e "s,@WITHCC@,$WITHCC," \
    -e "s,@TLSOPT@,$TLSOPT," \
	$CWD/slack-desc > $PKG/install/slack-desc

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