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Renamed to VL_LIB_READLINE.
AC_LIB_READLINE
Searches for a readline compatible library. If found, defines `HAVE_LIBREADLINE'. If the found library has the `add_history' function, sets also `HAVE_READLINE_HISTORY'. Also checks for the locations of the necessary include files and sets `HAVE_READLINE_H' or `HAVE_READLINE_READLINE_H' and `HAVE_READLINE_HISTORY_H' or 'HAVE_HISTORY_H' if the corresponding include files exists.
The libraries that may be readline compatible are `libedit', `libeditline' and `libreadline'. Sometimes we need to link a termcap library for readline to work, this macro tests these cases too by trying to link with `libtermcap', `libcurses' or `libncurses' before giving up.
Here is an example of how to use the information provided by this macro to perform the necessary includes or declarations in a C file:
#include <config.h> #ifdef HAVE_LIBREADLINE #if defined(HAVE_READLINE_READLINE_H) #include <readline/readline.h> #elif defined(HAVE_READLINE_H) #include <readline.h> #else /* !defined(HAVE_READLINE_H) */ extern char *readline (); #endif /* !defined(HAVE_READLINE_H) */ char *cmdline = NULL; #else /* !defined(HAVE_READLINE_READLINE_H) */ /* no readline */ #endif /* HAVE_LIBREADLINE */ #ifdef HAVE_READLINE_HISTORY #if defined(HAVE_READLINE_HISTORY_H) #include <readline/history.h> #elif defined(HAVE_HISTORY_H) #include <history.h> #else /* !defined(HAVE_HISTORY_H) */ extern void add_history (); extern int write_history (); extern int read_history (); #endif /* defined(HAVE_READLINE_HISTORY_H) */ /* no history */ #endif /* HAVE_READLINE_HISTORY */
Ville Laurikari <vl@iki.fi>
2005-01-25
AC_DEFUN([AC_LIB_READLINE], [ AC_CACHE_CHECK([for a readline compatible library], ac_cv_lib_readline, [ ORIG_LIBS=$LIBS for readline_lib in readline edit editline; do for termcap_lib in "" termcap curses ncurses; do if test -z "$termcap_lib"; then TRY_LIB="-l$readline_lib" else TRY_LIB="-l$readline_lib -l$termcap_lib" fi LIBS="$ORIG_LIBS $TRY_LIB" AC_TRY_LINK_FUNC(readline, ac_cv_lib_readline="$TRY_LIB") if test -n "$ac_cv_lib_readline"; then break fi done if test -n "$ac_cv_lib_readline"; then break fi done if test -z "$ac_cv_lib_readline"; then ac_cv_lib_readline="no" LIBS=$ORIG_LIBS fi ]) if test "$ac_cv_lib_readline" != "no"; then AC_DEFINE(HAVE_LIBREADLINE, 1, [Define if you have a readline compatible library]) AC_CHECK_HEADERS(readline.h readline/readline.h) AC_CACHE_CHECK([whether readline supports history], ac_cv_lib_readline_history, [ ac_cv_lib_readline_history="no" AC_TRY_LINK_FUNC(add_history, ac_cv_lib_readline_history="yes") ]) if test "$ac_cv_lib_readline_history" = "yes"; then AC_DEFINE(HAVE_READLINE_HISTORY, 1, [Define if your readline library has \`add_history']) AC_CHECK_HEADERS(history.h readline/history.h) fi fi ])