csrc/configure

#!/usr/bin/env sh
# csrc/configure
# 
# Part of the CCNx distribution.
#
# Copyright (C) 2009-2013 Palo Alto Research Center, Inc.
#
# This work is free software; you can redistribute it and/or modify it under
# the terms of the GNU General Public License version 2 as published by the
# Free Software Foundation.
# This work is distributed in the hope that it will be useful, but WITHOUT ANY
# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
# FOR A PARTICULAR PURPOSE.
#

CONFDIR="`dirname $0`/conf"

TryAppend () {
 test -f "$CONFDIR"/"$1".mk || return 0
 sed -e '/^[#] /d' "$CONFDIR"/"$1".mk >> conf.mk
}

TryScript () {
 SCRIPT="$CONFDIR"/"$1".sh
 shift
 test -f "$SCRIPT" || return 0
 sh "$SCRIPT" "$@"
}

ProvideDefault () {
 value=`eval 'echo ${'${1}':-:EMPTY:}'`
 [ "$value" != ":EMPTY:" ] && echo ${1} = $value >> conf.mk && return 0
 [ "$2" = "=" ] || return 0
 grep '^'${1}'[ 	]*=' conf.mk > /dev/null && return 0
 echo $* >> conf.mk
}

test -f conf.mk && mv conf.mk conf.mk~
echo '#' generated `uname -nsrv` > conf.mk
# Append each of the relevant conf/*.mk,
# in order by increasing specificity.
TryAppend "`uname`"
TryAppend "`uname -sr | sed -e 's/ /-/g'`"
# Next the relevant scripts, that get to do whatever is needed.
TryScript "`uname`" "$@"
# Local overrides happen next
TryAppend "local"
TryScript "local" "$@"

# CFLAGS take some extra care.
# Save these as COPT in conf.mk
[ -z "$CFLAGS" ] || echo COPT = $CFLAGS >> conf.mk

# Finally, provide default values and pick up overrides from the environment
ProvideDefault COPT = -g
ProvideDefault CWARNFLAGS
ProvideDefault PLATCFLAGS
ProvideDefault CPREFLAGS
ProvideDefault INSTALL_BASE = /usr/local
ProvideDefault INSTALL_INCLUDE = '$(INSTALL_BASE)/include'
ProvideDefault INSTALL_LIB = '$(INSTALL_BASE)/lib'
ProvideDefault INSTALL_BIN = '$(INSTALL_BASE)/bin'

ProvideDefault PCAP_PROGRAMS = ccndumppcap
ProvideDefault RESOLV_LIBS = -lresolv

: ${ANT:=`command -v ant || echo echo SKIPPING ant`}

ProvideDefault ANT
ProvideDefault AR
ProvideDefault CC
ProvideDefault CP = cp
ProvideDefault INSTALL = install
ProvideDefault LS = /bin/ls
ProvideDefault RM = rm -f
ProvideDefault SH = /bin/sh
ProvideDefault MKDEP = gcc -MM

# For the benefit of makefiles outside of csrc
ProvideDefault BUILD_JAVA = true
grep '^BUILD_JAVA[ 	]*=' conf.mk | tail -n 1 | grep 'true' >/dev/null || \
  echo ANT = : skipping ant >> conf.mk

cat <<'EOF' >> conf.mk
DINST_BIN = $(DESTDIR)$(INSTALL_BIN)
DINST_INC = $(DESTDIR)$(INSTALL_INCLUDE)
DINST_LIB = $(DESTDIR)$(INSTALL_LIB)
EOF

echo ============= conf.mk =============>&2
cat conf.mk				>&2
echo ===================================>&2
make config_subdir
test -f conf.mk~ || exit 0
cmp conf.mk~ conf.mk || make clean