# -*- sh -*- (looks nicer that way!)
# This is the configure.in script for libghthash.

AC_INIT(src/hash_table.c)

# Check for sizes of different types
AC_DEFUN([GET_SIZEOF],
    [
    __TMPFILE=/tmp/conftestval   # Change this to something really unique.
    echo -n "checking size of $2... "
    AC_TRY_RUN([
	#include <stdio.h>
	#include <stdlib.h>
	int main ()
	{
	    FILE *f = fopen ("$__TMPFILE", "w");
	    if (!f)
	    exit (1);
	    fprintf (f, "%d", sizeof ($2));
	    fclose(f);
	    exit (0);
	}
	],
	#Success
	$1=`cat $__TMPFILE`
	echo `cat $__TMPFILE`
	rm -f $__TMPFILE
	,
	#Failure
	$1="CHECK_SIZE_FAILED"
	rm -f $__TMPFILE
	,
	#Cross compiling - assume sizes is as on x86/GCC
	if test $2 = int; then
	    $1=4
	else if test $2 = long; then
	    $1=4
	else if test $2 = short; then
	    $1=2
	else if test $2 = "long long"; then
	    $1=8
	fi # long long
	fi # short
	fi # long
	fi # int
	) # AC_TRY_RUN
    ]
)

# Set various version strings - taken gratefully from the
# SDL sources which was taken from the GTk sources
#
# Making releases:
# Change
#   MICRO_VERSION += 1;
#   INTERFACE_AGE += 1;
#   BINARY_AGE += 1;
# if any functions have been added, set INTERFACE_AGE to 0.
# if backwards compatibility has been broken,
# set BINARY_AGE and INTERFACE_AGE to 0.
#
MAJOR_VERSION=0
MINOR_VERSION=6
MICRO_VERSION=2
INTERFACE_AGE=0
BINARY_AGE=1
VERSION=$MAJOR_VERSION.$MINOR_VERSION.$MICRO_VERSION
# For libtool
LT_RELEASE=$MAJOR_VERSION.$MINOR_VERSION
LT_CURRENT=`expr $MICRO_VERSION - $INTERFACE_AGE`
LT_REVISION=$INTERFACE_AGE
LT_AGE=`expr $BINARY_AGE - $INTERFACE_AGE`

AC_SUBST(MAJOR_VERSION)
AC_SUBST(MINOR_VERSION)
AC_SUBST(MICRO_VERSION)
AC_SUBST(INTERFACE_AGE)
AC_SUBST(BINARY_AGE)
AC_SUBST(VERSION)

AC_SUBST(LT_RELEASE)
AC_SUBST(LT_CURRENT)
AC_SUBST(LT_REVISION)
AC_SUBST(LT_AGE)

#automake configuration
AM_INIT_AUTOMAKE(libghthash, $VERSION)

#autoheader configuration
AM_CONFIG_HEADER(config.h)

#check for programs
AC_PROG_CC()
AM_PROG_LIBTOOL()
AC_PROG_INSTALL()
AC_PROG_MAKE_SET()
AC_LANG_C()
AC_C_INLINE()

# Check for headers
AC_HEADER_STDC()
AC_CHECK_HEADERS(sys/types.h stdlib.h stdio.h errno.h string.h assert.h,,AC_MSG_ERROR(required header files missing))

GET_SIZEOF(SIZEOF_SHORT, short)
GET_SIZEOF(SIZEOF_INT, int)
GET_SIZEOF(SIZEOF_LONG, long)
GET_SIZEOF(SIZEOF_LONG_LONG, long long)

if test x$SIZEOF_INT = x4; then
    INT32_T=int
else if test x$SIZEOF_LONG = x4; then
    INT32_T=long
else if test x$SIZEOF_LONG_LONG = x4; then
    INT32_T=long long
else if test x$SIZEOF_SHORT =x4; then
    INT32_T=short
else
    AC_MSG_ERROR(Did not find any 4-byte int type!)
fi # SIZEOF_SHORT
fi # SIZEOF_LONG_LONG
fi # SIZEOF_LONG
fi #SIZEOF_INT

AC_SUBST(INT32_T)

AC_ARG_ENABLE(debug,
	      [  --enable-debug          enable debugging and disable optimisations [default=no]],
	      DEBUG_ON=$withval,
	      DEBUG_ON=no)

# Enable debugging
if test x$DEBUG_ON = xyes; then
      CFLAGS="$CFLAGS -g"
else
#      CFLAGS='echo $CFLAGS | sed "s/-g//g"'
      CFLAGS="$CFLAGS -DNDEBUG"
fi

# Set special cflags if GCC is used
if test x$ac_cv_prog_gcc = xyes; then
    CFLAGS="$CFLAGS -Wall"
fi
AC_SUBST(CFLAGS)

AC_OUTPUT(Makefile src/ght_hash_table.h src/Makefile examples/Makefile)