diff options
Diffstat (limited to 'conf/m4/plptools/PLP_CHECK_READLINE.m4')
| -rw-r--r-- | conf/m4/plptools/PLP_CHECK_READLINE.m4 | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/conf/m4/plptools/PLP_CHECK_READLINE.m4 b/conf/m4/plptools/PLP_CHECK_READLINE.m4 new file mode 100644 index 0000000..1b99a19 --- /dev/null +++ b/conf/m4/plptools/PLP_CHECK_READLINE.m4 @@ -0,0 +1,41 @@ +dnl +dnl Check for libreadline and if it is available, check if it +dnl depends on libcurses. (Normally, it silently resolves the +dnl following symbols from libtermcap: +dnl tgetnum, tgoto, tgetflag, tputs, tgetent, BC, PC, UP +dnl On RedHat 7.0 however, libtermcap is broken: It contains no +dnl symbols at all. Fortunately, libcurses provides the same +dnl and therefore we have to check for that special case.) +dnl +AC_DEFUN(PLP_CHECK_READLINE, +[ + AC_MSG_CHECKING(for readline in -lreadline) + ac_cv_addcurses=false + ac_cv_have_libreadline=false + saved_libs=$LIBS + LIBS="$LIBS -lreadline" + link1ok=0 + link2ok=0 + AC_TRY_LINK(,[extern char *readline(void); readline();],link1ok=1) + LIBS="$LIBS -lreadline -lcurses" + AC_TRY_LINK(,[extern char *readline(void); readline();],link2ok=1) + LIBS="$saved_LIBS" + case "$link1ok$link2ok" in + 00) + AC_MSG_RESULT(no) + ;; + 01) + ac_cv_have_libreadline=true; + ac_cv_addcurses=true + AC_DEFINE_UNQUOTED(HAVE_LIBREADLINE) + AC_MSG_RESULT([yes, and needs libcurses]) + ;; + 1*) + ac_cv_have_libreadline=true; + AC_DEFINE_UNQUOTED(HAVE_LIBREADLINE) + AC_MSG_RESULT(yes) + ;; + esac + AM_CONDITIONAL(HAVE_LIBREADLINE, test x$ac_cv_have_libreadline = xtrue) + AM_CONDITIONAL(ADD_LIBCURSES, test x$ac_cv_addcurses = xtrue) +]) |