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#!/bin/sh
# Helper script to install bison 3 (primarily for travis CI)
set -x
PACKAGE=bison
MIN_VERSION=3.0.0
INSTALL_VERSION=3.0.5
# Bison requires that CC is a C compiler
CC=cc
export CC
AWK=${AWK:-awk}
BISON=${BISON:-bison}
CURL=${CURL:-curl}
WGET=${WGET:-wget}
FILE="$PACKAGE-$INSTALL_VERSION.tar.gz"
URL="http://ftp.gnu.org/gnu/bison/$PACKAGE-$INSTALL_VERSION.tar.gz"
ROOT_DIR=${TMPDIR:-/tmp}
BUILD_DIR="$ROOT_DIR/build-$PACKAGE"
installed_version=`$BISON --version 2>&1 | sed -ne 's/^.*GNU Bison[^0-9]*//p'`
installed_version_dec=`echo $installed_version | $AWK -F. '{printf("%d\n", 10000*$1 + 100*$2 + $3)};'`
min_version_dec=`echo $MIN_VERSION | $AWK -F. '{printf("%d\n", 10000*$1 + 100*$2 + $3)};'`
if test $installed_version_dec -ge $min_version_dec; then
echo "$PACKAGE $installed_version is new enough"
else
mkdir $BUILD_DIR && cd $BUILD_DIR
$WGET -O $FILE $URL || $CURL -o $FILE $URL
tar -x -z -f $FILE && rm $FILE
cd $PACKAGE-$INSTALL_VERSION && ./configure --prefix=/usr && make && sudo make install
cd / && rm -rf $BUILD_DIR
fi
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