#/bin/bash

################################################################################
#  gawk                                                                        #
#------------------------------------------------------------------------------#
#          GNU awk: programs for manipulating text files                       #
################################################################################

# pkg info
P=gawk
V=3.1.5
PV=$P-$V
A=$PV.tar.bz2

# misc dirs
SD=/usr/src			# dir holding src tarballs and patches
TMP=/tmp			# tmp dir, where we build the packages
ST=$TMP/$PV			# src tree of untarred pkg
LDR=/var/log/build/$PV		# dir holding logfiles for the given package

# logfiles
TL=$TMP/tmplog			# tmp file used for logging
PALOG=$LDR/patch.log		# logfile of output from patching
CFLOG=$LDR/configure.log	# logfile of output from running configure
BLOG=$LDR/build.log		# logfile of output from building
CHLOG=$LDR/check.log		# logfile of output from running testsuites
ILOG=$LDR/install.log		# logfile of output from package install
PILOG=$LDR/postinstall.log	# logfile of output from postinstall commands

# patches
PAT1=$SD/$PV-segfault_fix-1.patch

# compilation flags
# march:		athlon-xp
# optimize level:	2 (default)
MARCH="athlon-xp"
OPTIMIZ="O2"
export CFLAGS="-march=$MARCH -$OPTIMIZ"
export CXXFLAGS="$CFLAGS"


set -e				# ensure script stops on errors

# B1. unpack the tarballs ******************************************************
  cd $TMP
  tar xf $SD/$A
  
# B2. create dir to write build logs to ****************************************
  mkdir -p $LDR

# B3. patch src ****************************************************************
  cd $ST

  # Under some circumstances, gawk-3.1.5 attempts to free a chunk of memory
  # that was not allocated.
  # This bug is fixed by the following patch:
  ( patch -Np1 -i $PAT1 2>&1 | tee $PALOG && exit $PIPESTATUS )
  
# B4. configure package ********************************************************
  cd $ST
  ( ./configure --prefix=/usr --libexecdir=/usr/lib 2>&1	\
  				| tee $CFLOG && exit $PIPESTATUS )

  # Due to a bug in the configure script, gawk fails to detect certain aspects
  # of locale support in glibc.
  # This bug leads to, e.g., Gettext testsuite failures.
  # Work around this by appending the missing macro definitions to config.h:
cat >>config.h <<"EOF"
#define HAVE_LANGINFO_CODESET 1
#define HAVE_LC_MESSAGES 1
EOF

# B5. build package ************************************************************
  cd $ST
  ( make 2>&1 | tee $BLOG && exit $PIPESTATUS ) 

# B6. check build **************************************************************
  cd $ST
  ( make check 2>&1 | tee $CHLOG && exit $PIPESTATUS )

# B7. install package **********************************************************
  cd $ST
  ( make install 2>&1 | tee $ILOG && exit $PIPESTATUS )

# B8. postinstall configuration ************************************************
  # empty ---------------------

# B9. Compress build logs ******************************************************
  for logfile in $LDR/*
  do
    bzip2 -9 ${logfile}
  done

# B10. cleanup *****************************************************************
  cd $TMP
  rm -rf $ST		# remove unneeded src tree

# B11. print success message ***************************************************
echo "Package $PV successfully built and installed!"