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configure.ac: Remove unused AC_TYPE_SIGNAL macro

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Recent autoconf warns:
configure.ac:448: warning: The macro `AC_TYPE_SIGNAL' is obsolete.

And it turns out that we do not actually use RETSIGTYPE.
Additionally, there is no reason to do so since as the
autoconf documentation says:
"These days, it is portable to assume C89, and that signal
handlers return void, without needing to use this macro or
RETSIGTYPE."

Change-Id: I7da7c2d7d34c7e5efd52d448646b4398a1005e77
Signed-off-by: Frank Lichtenheld <frank@lichtenheld.com>
Acked-by: Arne Schwabe <arne-openvpn@rfc2549.org>
Message-Id: <20231128103740.61160-1-frank@lichtenheld.com>
URL: https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg27572.html
Signed-off-by: Gert Doering <gert@greenie.muc.de>
This commit is contained in:
Frank Lichtenheld 2023-11-28 11:37:40 +01:00 committed by Gert Doering
parent d1c31e4281
commit be05b590e8
1 changed files with 0 additions and 1 deletions
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configure.ac
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@ -445,7 +445,6 @@ AC_TYPE_OFF_T
AC_TYPE_PID_T
AC_TYPE_SIZE_T
AC_TYPE_UID_T
AC_TYPE_SIGNAL
AX_TYPE_SOCKLEN_T
AC_CHECK_SIZEOF([unsigned int])
AC_CHECK_SIZEOF([unsigned long])