AC_INIT(configure.in)

dnl generate config.h from config.h.in
AC_CONFIG_HEADER(config.h)	

dnl replace @extra_includes@ with the value of $extra_includes deduced
dnl from the configure script.
AC_SUBST(extra_includes)	

dnl allow the user to specify a directory for extra header files
AC_ARG_WITH(extra-includes, 
	[--with-extra-includes=DIR    where the extra includes are located ],
    extra_includes="$withval"
)     

dnl write a message to indicate we're looking for the argument, and
dnl print out the result.
AC_MSG_CHECKING("extra includes")
AC_MSG_RESULT($withval)

dnl use C++ for tests
AC_LANG_CPLUSPLUS	

dnl check for different programs and substitute CC, CXX, INSTALL in Makefile.in
AC_PROG_CXX	dnl C++ compiler
AC_PROG_CC  dnl C compiler
AC_PROG_INSTALL  dnl install program. We must place install-sh in directory.

dnl check sizes of data types and write defines in config.h
AC_CHECK_SIZEOF(int)		
AC_CHECK_SIZEOF(long long)	

dnl look for headers in standard directories
AC_CHECK_HEADERS(unistd.h  dirent.h)	

dnl user defined macro to look for QT header
AC_FIND_FILE("qglobal.h", [/usr/lib/qt/include /usr/lib/qt-2.1.0/include], qtdir)

dnl warn user if header wasn't found
if test $qtdir = NO
then
	AC_MSG_WARN([QT header not found])
fi

dnl try to compile and run a program.
dnl this example tests endianness
AC_TRY_RUN([
int main()
{
	short s = 1;
	short* ptr = &s;
	unsigned char c = *((char*)ptr);
	return c;	
}
]
, [ echo "big endian" ]
, [ echo "little endian" ]
)

dnl write a Makefile.

AC_OUTPUT(Makefile)