AC_INIT(sql_unixodbc.c)
AC_REVISION($Revision: 1.1 $)
AC_DEFUN(modname,[rlm_sql_unixodbc])

AC_PROG_CC
AC_PROG_CPP

AC_ARG_WITH(unixodbc-include-dir,
[  --with-unixodbc-include-dir=DIR       Directory where the unixODBC includes may be found ],
[ unixodbc_include_dir="$withval" ]
)

AC_ARG_WITH(unixodbc-lib-dir,
[  --with-unixodbc-lib-dir=DIR       Directory where the unixODBC libraries may be found ],
[ unixodbc_lib_dir="$withval" ]
)

AC_ARG_WITH(unixodbc-dir,
[  --with-unixodbc-dir=DIR       Base directory where unixODBC is installed ],
[ unixodbc_lib_dir="$withval/lib"
  unixodbc_include_dir="$withval/include"
]
)

if test x$with_[]modname != xno; then

	targetname=modname   # we might change this later.

	AC_MSG_CHECKING([for sql.h])

	AC_TRY_COMPILE([#include <sql.h>], [int a = 1;],
		UNIXODBC_INCLUDE=" ",
		UNIXODBC_INCLUDE=
	)

	if test "x$UNIXODBC_INCLUDE" = "x"; then
		old_CFLAGS="$CFLAGS"

		for try in /usr/local/include $unixodbc_include_dir; do
			CFLAGS="$old_CFLAGS -I$try"
			AC_TRY_COMPILE([#include <sql.h>], [int a = 1;],
				UNIXODBC_INCLUDE="-I$try",
				UNIXODBC_INCLUDE=
			)
			if test "x$UNIXODBC_INCLUDE" != "x"; then
				break;
			fi
		done
		CFLAGS="$old_CFLAGS"
	fi

	if test "x$UNIXODBC_INCLUDE" = "x"; then
		AC_MSG_RESULT(no)
		AC_MSG_WARN([unixODBC headers not found.  Use --with-unixodbc-include-dir=<path>.])
		targetname=   # disabled module
	else
		sql_unixodbc_cflags="${sql_unixodbc_cflags} ${UNIXODBC_INCLUDE}"
		AC_MSG_RESULT(yes)
  
		AC_MSG_CHECKING([for SQLConnect in -lodbc])

		old_LIBS="$LIBS"

		for try in /usr/local/lib $unixodbc_lib_dir; do
			LIBS="$old_LIBS -L$try -lodbc"
			AC_TRY_LINK([extern char SQLConnect();], [SQLConnect()],
				UNIXODBC_LIBS="-L$try -lodbc",
				UNIXODBC_LIBS=
			)
			if test "x$UNIXODBC_LIBS" != "x"; then
				break;
			fi
		done
		LIBS="$old_LIBS"

		dnl #  If one or the other isn't found, disable them both..
		dnl #  If both are found, enable them both.
		if test "x$UNIXODBC_LIBS" = "x"; then
			AC_MSG_RESULT(no)
			UNIXODBC_INCLUDE=
			AC_MSG_WARN([unixODBC libraries not found.  Use --with-unixODBC-lib-dir=<path>.])
			targetname=   # disabled module
		else
			AC_MSG_RESULT(yes) 
			sql_unixodbc_ldflags="$sql_unixodbc_ldflags $UNIXODBC_LIBS"
		fi
	fi

	sql_unixodbc_ldflags="$sql_unixodbc_ldflags $LIBS"

	if test "x$targetname" = "x"; then
		AC_MSG_WARN([sql submodule 'unixodbc' disabled])
	fi

else
	targetname=
	echo \*\*\* module modname is disabled.
fi

AC_SUBST(sql_unixodbc_ldflags)
AC_SUBST(sql_unixodbc_cflags)
AC_SUBST(targetname)
AC_OUTPUT(Makefile)