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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configure.ac:448: warning: The macro `AC_TYPE_SIGNAL' is obsolete.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 <[email protected]>
Acked-by: Arne Schwabe <[email protected]>
Message-Id: <[email protected]>
URL: https://www.mail-archive.com/[email protected]/msg27572.html
Signed-off-by: Gert Doering <[email protected]>
(cherry picked from commit be05b59)
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@flichtenheld @cron2
flichtenheld authored and cron2 committed Dec 2, 2023
1 parent aa19a6a commit 64703e7
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1 change: 0 additions & 1 deletion configure.ac
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Original file line number Diff line number Diff line change
Expand Up @@ -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])
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