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# CVC4_CHECK_FOR_READLINE
# -----------------------
# Look for readline and link it in, but allow user to disable.
AC_DEFUN([CVC4_CHECK_FOR_READLINE], [
AC_MSG_CHECKING([whether user requested readline support])
AC_ARG_WITH([readline], [AS_HELP_STRING([--with-readline], [support the readline library])], [], [with_readline=check])
LIBREADLINE=
if test "$with_readline" = no; then
AC_MSG_RESULT([no, readline disabled by user])
else
if test "$with_readline" = check; then
AC_MSG_RESULT([no preference by user, will auto-detect])
else
AC_MSG_RESULT([yes, readline enabled by user])
fi
AC_CHECK_LIB([readline], [readline],
[AC_CHECK_HEADER([readline/readline.h],
[READLINE_LIBS="-lreadline -lncurses -ltermcap -ltinfo"],
[if test "$with_readline" != check; then
AC_MSG_FAILURE([cannot find libreadline!])
fi])],
[if test "$with_readline" != check; then
AC_MSG_FAILURE([cannot find libreadline!])
fi], [-lncurses -ltermcap -ltinfo])
if test -z "$READLINE_LIBS"; then
with_readline=no
else
# make sure it works in static builds, too
if test "$enable_static_binary" = yes; then
AC_MSG_CHECKING([whether statically-linked readline is functional])
AC_LANG_PUSH([C++])
cvc4_save_LIBS="$LIBS"
cvc4_save_LDFLAGS="$LDFLAGS"
LDFLAGS="-static $LDFLAGS"
LIBS="$READLINE_LIBS $LIBS"
AC_LINK_IFELSE([AC_LANG_PROGRAM([#include <readline/readline.h>],
[readline("")])],
[ AC_MSG_RESULT([yes, it works])
with_readline=yes ],
[ AC_MSG_RESULT([no])
if test "$with_readline" != check; then
AC_MSG_FAILURE([readline installation incompatible with static-binary])
fi
with_readline=no ])
LIBS="$cvc4_save_LIBS"
LDFLAGS="$cvc4_save_LDFLAGS"
AC_LANG_POP([C++])
else
with_readline=yes
fi
fi
if test "$with_readline" = yes; then
HAVE_LIBREADLINE=1
else
HAVE_LIBREADLINE=0
READLINE_LIBS=
fi
AC_DEFINE_UNQUOTED([HAVE_LIBREADLINE], ${HAVE_LIBREADLINE}, [Define to 1 to use libreadline])
AC_SUBST([READLINE_LIBS])
fi
])# CVC4_CHECK_FOR_READLINE
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