:
#
# Netris -- A free networked version of T*tris
# Copyright (C) 1994-1996,1999  Mark H. Weaver <mhw@netris.org>
# 
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
# 
# This program 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.  See the
# GNU General Public License for more details.
# 
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
#

CC="gcc"
COPT="-O"
CEXTRA="-m486"
LEXTRA=""
CURSES_HACK=false

while [ $# -ge 1 ]; do
	opt="$1"
	shift
	case "$opt" in
		-g)
			COPT="-g -O0"
#			CEXTRA="-Wall -Wstrict-prototypes -m486"
			;;
		-O*)
			COPT="$opt"
			CEXTRA="-DNDEBUG"
			;;
		--cc)
			CC="$1"
			shift
			;;
		--copt)
			COPT="$1"
			shift
			;;
		--cextra)
			CEXTRA="$1"
			shift
			;;
		--lextra)
			LEXTRA="$1"
			shift
			;;
		--curses-hack)
			CURSES_HACK=true
			;;
		--lang)
			lang="$1"
			shift
			;;
		*)
			cat << "END"
Usage: ./configure [options...]
    -g: Full debugging, no optimization, and full warnings
    -O?: Optimization, no debugging or warnings
    --cc <compiler>: Set the C compiler to use (default "gcc")
    --copt <opt>: Set C optimization flags
    --cextra <opt>: Set extra C flags
    --lextra <opt>: Set extra linker flags
    --curses-hack: Disable scroll-optimization for broken curses
    --lang <code>: Preferred interface language (default "en")
END
			exit 1
			;;
	esac
done

CFLAGS="$COPT $CEXTRA"

echo "Checking for libraries"
echo 'main(){}' > test.c
LFLAGS=""
for lib in -lcurses -lncurses; do
	if $CC $CFLAGS $LEXTRA test.c $lib > /dev/null 2>&1; then
		LFLAGS="$lib"
	fi
done
for lib in -lsocket -lnsl -ltermcap; do 
	if $CC $CFLAGS $LEXTRA test.c $lib > /dev/null 2>&1; then
		LFLAGS="$LFLAGS $lib"
	fi
done

echo "Checking for on_exit()"
cat << END > test.c
void handler(void) {}
main() { on_exit(handler, (void *)0); }
END
if $CC $CFLAGS $LEXTRA test.c > /dev/null 2>&1; then
	HAS_ON_EXIT=true
else
	HAS_ON_EXIT=false
fi

echo "Checking for sigprocmask()"
cat << END > test.c
#include <signal.h>
main() { sigset_t set; sigprocmask(SIG_BLOCK, &set, &set); }
END
if $CC $CFLAGS $LEXTRA test.c > /dev/null 2>&1; then
	HAS_SIGPROCMASK=true
else
	HAS_SIGPROCMASK=false
fi

echo "Checking for getopt.h"
cat << END > test.c
#include <getopt.h>
main(){}
END

if $CC $CFLAGS $LEXTRA test.c > /dev/null 2>&1; then
	HAS_GETOPT_H=true
else
	HAS_GETOPT_H=false
fi

echo "Checking for memory.h"
cat << END > test.c
#include <memory.h>
main(){}
END

if $CC $CFLAGS $LEXTRA test.c > /dev/null 2>&1; then
	HAS_MEMORY_H=true
else
	HAS_MEMORY_H=false
fi

rm -f test.c test.o a.out

test -z "$lang" && lang=en
MSG_FILE=msg.$lang.h
if [ ! -f $MSG_FILE ]; then
	echo "Error: $MSG_FILE not found"
	exit
fi

echo "Creating config.mak"
cat > config.mak << END
### Automatically generated by ./configure ###

CC = $CC
COPT = $COPT
CEXTRA = $CEXTRA
LEXTRA = $LEXTRA
LFLAGS = $LEXTRA $LFLAGS
CFLAGS = \$(CEXTRA) \$(COPT)
MSG_FILE = $MSG_FILE
END

echo "Creating config.h"
cat << END > config.h
/*** Automatically generated by ./configure ***/

END

if [ "$HAS_GETOPT_H" = "true" ]; then
	echo "#include <getopt.h>" >> config.h
else
	echo "extern char *optarg;" >> config.h
	echo "extern int optind;" >> config.h
fi
if [ "$HAS_MEMORY_H" = "true" ]; then
	echo "#include <memory.h>" >> config.h
fi
if [ "$HAS_ON_EXIT" = "true" ]; then
	echo "#define HAS_ON_EXIT" >> config.h
fi
if [ "$HAS_SIGPROCMASK" = "true" ]; then
	echo "#define HAS_SIGPROCMASK" >> config.h
fi
if [ "$CURSES_HACK" = "true" ]; then
	echo "#define CURSES_HACK" >> config.h
fi

cat << END

Now do a 'make'

END