configure

#!/bin/sh
#
# Search for GCC or XL C/C++, former if both exist
#
# To add another compiler, just create Makefile.XXX and add XXX to $CCS
#
# To prevent ugly Makefile extensions, underscore and chars following it
# in the name XXX are automatically removed before locating relevant
# Makefile. This is why compiler "xlc_r" has Makefile extension "xlc".
# This can be disabled if neccessary.
#

CCS="xlc_r gcc"

#
# Look for supported compilers
#
for c in $CCS; do
	if CCPATH=`which $c 2>&1` && [ -z "${CCPATH%%/*}" ]; then
		CC="$c"
		break
	fi
done

#
# Make a link to a proper Makefile.*
#
if [ -z "$CC" ]; then
	echo "Unable to find GNU GCC or IBM XL C/C++. Fix your PATH!"
	exit 1
else
	echo "Using $CCPATH to compile Cntlm"
	[ -h Makefile ] && rm -f Makefile 2>/dev/null
	case "$CC" in
		gcc)
			# default Makefile is for GCC; just revert back to
			# GCC if Makefile is linked to other compiler version
			if [ ! -f Makefile ]; then
				mv Makefile.gcc Makefile
			fi
			;;
		*)
			# backup default GCC Makefile and create a link to other
			if [ -f Makefile ]; then
				mv Makefile Makefile.gcc
			fi

			EXT=`echo "$CC" | sed 's/_.*//'`
			ln -s Makefile.$EXT Makefile
			;;
	esac
fi

STAMP=configure-stamp
CONFIG=config/config.h
TESTS="endian strdup socklen_t gethostname"

#[ -f $STAMP ] && exit 0
touch $STAMP

rm -f $CONFIG
for i in $TESTS; do
	printf "Checking $i... "
	printf "#define config_$i " >> $CONFIG
	OUT=`$CC -D_POSIX_C_SOURCE=199506L -D_ISOC99_SOURCE -D_REENTRANT -o config/$i config/$i.c 2>&1`
	rc=$?

	if [ $rc -ne 0 ]; then # -o -n "$OUT" ]; then
		rc=0
		RET=no
	else
		RET=`./config/$i`
		rc=$?
		[ -z "$RET" ] && if [ $rc -eq 0 ]; then RET="no"; else RET=yes; fi
	fi

	echo $rc >> $CONFIG
	echo $RET
done