build: Probe MSG_DONTWAIT in the same way as MSG_NOSIGNAL

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

View File

@ -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")));

View File

@ -47,9 +47,7 @@
#include <unistd.h>
#endif
#ifdef WIN32
#define MSG_DONTWAIT 0
#else
#ifndef WIN32
typedef u_int SOCKET;
#include "errno.h"
#define WSAGetLastError() errno
@ -79,6 +77,11 @@ typedef u_int SOCKET;
#define MSG_NOSIGNAL 0
#endif
// MSG_DONTWAIT is not available on some platforms, if it doesn't exist define it as 0
#if !defined(HAVE_MSG_DONTWAIT) && !defined(MSG_DONTWAIT)
#define MSG_DONTWAIT 0
#endif
#if HAVE_DECL_STRNLEN == 0
size_t strnlen( const char *start, size_t max_len);
#endif // HAVE_DECL_STRNLEN