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#!/bin/bash
#
# SlackBuild for iverilog (Icarus Verilog)
# http://www.icarus.com/eda/verilog/
#
# Author: Luis ( luis at riseup d0t net )
#

CWD=`pwd`

# Look for slackbuildrc
if [ -f ~/.slackbuildrc ]; then
  source ~/.slackbuildrc
elif [ -f /etc/slackbuildrc ]; then
  source /etc/slackbuildrc
fi

# Set variables
SRC_NAME="verilog"
PKG_NAME="iverilog"
ARCH=${ARCH:=i486}
VERSION=${VERSION:=0.8.3}
BUILD=${BUILD:=1ls}
SRC_DIR=${SRC_DIR:=$CWD}
TMP=${TMP:=/tmp}
PKG=${PKG:=$TMP/package-$PKG_NAME}
REPOS=${REPOS:=$TMP}
PREFIX=${PREFIX:=/usr}
PKG_SRC="$SRC_DIR/$SRC_NAME-$VERSION"

# Set system libraries' path and optmization flags based on $ARCH
LIBDIR="$PREFIX/lib"

if [ "$ARCH" = "i386" ]; then
  SLKCFLAGS="-O2 -march=i386 -mcpu=i686"
elif [ "$ARCH" = "i486" ]; then
  SLKCFLAGS="-O2 -march=i486 -mcpu=i686"
elif [ "$ARCH" = "i686" ]; then
  SLKCFLAGS="-O2 -march=i686"
elif [ "$ARCH" = "s390" ]; then
  SLKCFLAGS="-O2"
elif [ "$ARCH" = "x86_64" ]; then
  SLKCFLAGS="-O2"
  LIBDIR="$PREFIX/lib64"
fi

# Set error codes (used by createpkg)
ERROR_WGET=31;      ERROR_MAKE=32;      ERROR_INSTALL=33
ERROR_MD5=34;       ERROR_CONF=35;      ERROR_HELP=36
ERROR_TAR=37;       ERROR_MKPKG=38;     ERROR_GPG=39
ERROR_PATCH=40;     ERROR_VCS=41;       ERROR_MKDIR=42

# Clean up any leftovers of previous builds
rm -rf "$PKG_SRC" 2> /dev/null
rm -rf "$PKG" 2> /dev/null

# Create directories, if necessary
mkdir -p "$SRC_DIR" || exit $ERROR_MKDIR
mkdir -p "$PKG" || exit $ERROR_MKDIR
mkdir -p "$REPOS" || exit $ERROR_MKDIR

# Dowload source, if necessary
SRC="$SRC_NAME-$VERSION.tar.gz"
URL="ftp://ftp.icarus.com/pub/eda/verilog/v0.8/$SRC"

if [ ! -s "$SRC_DIR/$SRC" ] || ! gzip -t "$SRC_DIR/$SRC" 2> /dev/null; then
  wget "$URL" -O "$SRC_DIR/$SRC" || exit $ERROR_WGET
fi

# Untar, configure, compile and install
cd "$SRC_DIR"
tar --no-same-owner --no-same-permissions -xvf "$SRC_DIR/$SRC" || exit $ERROR_TAR
cd "$PKG_SRC"
CFLAGS="$SLKCFLAGS" \
  CXXFLAGS="$SLKCFLAGS" \
  ./configure || exit $ERROR_CONF
make || exit $ERROR_MAKE
make install prefix="$PKG/$PREFIX" || exit $ERROR_INSTALL

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

# Compress and link manpages
if [ -d "$PKG/$PREFIX/man" ]; then
  ( cd "$PKG/$PREFIX/man"
    for manpagedir in $(find . -type d -name "man*") ; do
      ( cd $manpagedir
        for eachpage in $( find . -type l -maxdepth 1) ; do
          ln -s $( readlink $eachpage ).gz $eachpage.gz
          rm $eachpage
        done
        gzip -9 *.?
      )
    done
  )
fi

# Install documentation and examples
mkdir -p "$PKG/$PREFIX/doc/$PKG_NAME-$VERSION/vvp" || exit $ERROR_MKDIR
cp -a COPYING INSTALL *.txt examples "$PKG/$PREFIX/doc/$PKG_NAME-$VERSION"
cp -a vvp/*.txt vvp/examples "$PKG/$PREFIX/doc/$PKG_NAME-$VERSION/vvp"

# Add package description (slack-desc)
mkdir -p "$PKG/install" || exit $ERROR_MKDIR
cat << EODESC > "$PKG/install/slack-desc"
# HOW TO EDIT THIS FILE:
# The "handy ruler" below makes it easier to edit a package description.  Line
# up the first '|' above the ':' following the base package name, and the '|'
# on the right side marks the last column you can put a character in.  You must
# make exactly 11 lines for the formatting to be correct.  It's also
# customary to leave one space after the ':'.

        |-----handy-ruler------------------------------------------------------|
iverilog: iverilog (Icarus Verilog)
iverilog:
iverilog: The Icarus verilog compiler for the Verilog hardware description
iverilog: language (HDL), as described in the IEEE-1364 standard. The compiler
iverilog: can target either simulation, or netlist (XNF).
iverilog:
iverilog: For more information, http://www.icarus.com/eda/verilog/
iverilog:
iverilog:
iverilog:
iverilog:
EODESC

# Build the package
cd "$PKG"
makepkg -l y -c n "$REPOS/$PKG_NAME-$VERSION-$ARCH-$BUILD.tgz" || exit $ERROR_MKPKG

# Delete source and build directories, if requested
if [ "$CLEANUP" == "yes" ]; then
  rm -rf "$PKG_SRC" "$PKG"
fi