dnl This is a little s script written by Rob Flynn of Linux Support Services, Inc.
dnl Hopefully, it will allow better detection of the GSM libraries.  Who knows ;-)
dnl If you have any patches, send them to:
dnl
dnl rob@linux-support.net
dnl
dnl Thanks! :-)
dnl

AC_DEFUN(GSM_LIBS_CHECK,[
AC_ARG_WITH(gsmlibrary, [  --with-gsmlibrary        Location of GSM library)],
		    [gsmlibrary="$withval"], [gsmlibrary=detect])
AC_ARG_WITH(gsminclude, [  --with-gsminclude        Location of GSM headers)],
		    [gsminclude="$withval"], [gsminclude=detect])

dnl If they specified a location for the GSM libraries, let's add it to our
dnl path.

if test "$gsmlibrary" != "detect" ; then
	LIBS="$LIBS -L$gsmlibrary"
fi

old_CFLAGS="$CFLAGS"

if test "$gsminclude" != "detect" ; then
	CFLAGS="$CFLAGS -I$gsminclude"
	if test \! -z "$gsminclude" ; then
		CPPFLAGS="$CPPFLAGS -I$gsminclude"
	fi
fi

AC_CHECK_HEADER(gsm.h,hasgsm=yes, AC_MSG_ERROR([
* You must have the GSM Headers installed before continuing.  
* Install them or try configure --with-gsminclude=path_to_gsm_headers
]))

if test "$hasgsm" = yes; then
	AC_CHECK_LIB(gsm, main, LIBGSM="-lgsm", AC_MSG_ERROR([You must have the GSM libraries installed before continuing.  Install them or try --with-gsmlibrary=path_to_gsm_libs]))
else
	CFLAGS="$old_CFLAGS"
fi

AC_SUBST(CFLAGS)
AC_SUBST(LIBS)
])