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build: check MSG_NOSIGNAL directly, drop detection and interim macro

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Drop detecting it at configure time, along with the interim macro
`HAVE_MSG_NOSIGNAL`. There is no longer a reason for this workaround,
and allows to save the work at configure time and simplify.

Also say in a comment that `sys/socket.h` is defining this macro.

Follow-up to 77b3bc239d

Closes #20559
This commit is contained in:
Viktor Szakats 2026-02-11 04:10:00 +01:00
parent c05cd2a10e
commit 982ab7b53f
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9 changed files with 4 additions and 62 deletions
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39
acinclude.m4
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@ -703,45 +703,6 @@ AC_DEFUN([CURL_CHECK_FUNC_SEND], [
fi
])
dnl CURL_CHECK_MSG_NOSIGNAL
dnl -------------------------------------------------
dnl Check for MSG_NOSIGNAL
AC_DEFUN([CURL_CHECK_MSG_NOSIGNAL], [
AC_CHECK_HEADERS(sys/types.h)
AC_CACHE_CHECK([for MSG_NOSIGNAL], [curl_cv_msg_nosignal], [
AC_COMPILE_IFELSE([
AC_LANG_PROGRAM([[
#undef inline
#ifdef _WIN32
#ifndef WIN32_LEAN_AND_MEAN
#define WIN32_LEAN_AND_MEAN
#endif
#include <winsock2.h>
#else
#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#include <sys/socket.h>
#endif
]],[[
int flag = MSG_NOSIGNAL;
(void)flag;
]])
],[
curl_cv_msg_nosignal="yes"
],[
curl_cv_msg_nosignal="no"
])
])
case "$curl_cv_msg_nosignal" in
yes)
AC_DEFINE_UNQUOTED(HAVE_MSG_NOSIGNAL, 1,
[Define to 1 if you have the MSG_NOSIGNAL flag.])
;;
esac
])
dnl CURL_CHECK_STRUCT_TIMEVAL
dnl -------------------------------------------------