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build: Probe MSG_DONTWAIT in the same way as MSG_NOSIGNAL

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Instead of the WIN32-specific workaround, detect lack of `MSG_DONTWAIT`
in the build system. This allows other platforms without `MSG_DONTWAIT`
to work too.
This commit is contained in:
Wladimir J. van der Laan
2017-03-05 09:29:37 +00:00
parent 53c300fb52
commit c459d509b7
2 changed files with 15 additions and 3 deletions
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9
configure.ac
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@@ -558,6 +558,15 @@ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <sys/socket.h>]],
[ AC_MSG_RESULT(no)]
)
dnl Check for MSG_DONTWAIT
AC_MSG_CHECKING(for MSG_DONTWAIT)
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <sys/socket.h>]],
[[ int f = MSG_DONTWAIT; ]])],
[ AC_MSG_RESULT(yes); AC_DEFINE(HAVE_DONTWAIT, 1,[Define this symbol if you have MSG_DONTWAIT]) ],
[ AC_MSG_RESULT(no)]
)
AC_MSG_CHECKING([for visibility attribute])
AC_LINK_IFELSE([AC_LANG_SOURCE([
int foo_def( void ) __attribute__((visibility("default")));