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m4: Check for history_set_history_state instead of add_history

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The add_history function is available on both - libreadline and libedit.

The read difference between those two libraries is that for libedit the
history_set_history_state is missing.
On that basis one can assess if we do have history from libreadline or
from libedit.
This commit is contained in:
Lukasz Majewski 2021-07-01 16:00:33 +02:00 committed by Thomas Haller
parent 552e00990d
commit 0c5adc6938
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GPG key ID: 29C2366E4DFC5728
1 changed files with 2 additions and 1 deletions
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m4/ax_lib_readline.m4
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@ -99,7 +99,8 @@ AC_DEFUN([AX_LIB_READLINE], [
AC_CACHE_CHECK([whether readline supports history],
ax_cv_lib_readline_history, [
ax_cv_lib_readline_history="no"
AC_LINK_IFELSE([AC_LANG_CALL([], [add_history])], [ax_cv_lib_readline_history="yes"])
AC_LINK_IFELSE([AC_LANG_CALL([], [history_set_history_state])],
[ax_cv_lib_readline_history="yes"])
])
LIBS=$ORIG_LIBS