open configure/Configure
open configure/ncurses

#
# Readline configuration
#
# \begin{doc}
# \subsection{ReadLine library configuration}
# Add \verb+open configure/readline+ line to your \verb+OMakefile+ to get access to the following
# autoconfiguration variables.
# \varlabel{READLINE_AVAILABLE}{READLINE\_AVAILABLE} A boolean flag that would be set when both
# the \verb+readline/readline.h+ header, the \verb+readline/history.h+ header, and the \verb+readline+
# library very found.
#
# \varlabel{READLINE_GNU}{READLINE\_GNU} A boolean flag that would be set
# when the GNU version of the readline library is found (as opposed to the BSD one).
#
# \varlabel{READLINE_CFLAGS}{READLINE\_CFLAGS} The \verb+CFLAGS+ to use when compiling readline code.
# Will include \verb+-DREADLINE_ENABLED+ and \verb+-DREADLINE_GNU+, respectively
# when \verb+READLINE_AVAILABLE+ and \verb+READLINE_GNU+ are true.
#
# \varlabel{READLINE_CLIBS}{READLINE\_CLIBS} The \verb+LDFLAGS+ to use when linking readline code.
# Will normally contain \verb+-lncurses -lreadline+ when readline is found and remain empty otherwise.
# \end{doc}
#
#
static. =
    READLINE_AVAILABLE = false
    READLINE_CLIBS =
    READLINE_CFLAGS =
    READLINE_GNU = false
    if $(and $(NCURSES_AVAILABLE), $(not $(equal $(OSTYPE), Win32)))
        ConfMsgChecking(for readline)

        # Test that readline exists
        if $(and $(CheckHeader readline/readline.h readline/history.h), $(CheckLib ncurses readline, tgetent tgetstr readline))
            READLINE_AVAILABLE = true
            READLINE_CLIBS = -lncurses -lreadline
            READLINE_CFLAGS += -DREADLINE_ENABLED

            # Test for GNU
            if $(CheckLib ncurses readline, rl_on_new_line)
                READLINE_GNU = true
                READLINE_CFLAGS += -DREADLINE_GNU
                export

            export

        ConfMsgResult($(if $(READLINE_AVAILABLE), $"found, $(if $(not $(READLINE_GNU)), non-)GNU", NOT found))

        export