From: Dmitry V. Levin <ldv@altlinux.org>
Date: Tue, 12 Jan 2016 04:37:06 +0000 (+0000)
Subject: tests/mmsg.c: fix build on rhel6/ppc
X-Git-Tag: v4.12~649
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=eb4649a0dc0bfaa0df336de5dc95b41612e0b42d;p=strace

tests/mmsg.c: fix build on rhel6/ppc

There are weird platforms that define __NR_sendmmsg but at the same time
do not define __NR_recvmmsg.  Add a workaround for them.

* configure.ac (AC_CHECK_FUNCS): Add recvmmsg.
* tests/mmsg.c: Check for __NR_recvmmsg || HAVE_RECVMMSG.
---

diff --git a/configure.ac b/configure.ac
index 82573e58..21b83372 100644
--- a/configure.ac
+++ b/configure.ac
@@ -295,6 +295,7 @@ AC_CHECK_FUNCS(m4_normalize([
 	preadv
 	process_vm_readv
 	pwritev
+	recvmmsg
 	sendmmsg
 	sigaction
 	signalfd
diff --git a/tests/mmsg.c b/tests/mmsg.c
index 630ad1dd..0c9c7115 100644
--- a/tests/mmsg.c
+++ b/tests/mmsg.c
@@ -29,7 +29,8 @@
 #include "tests.h"
 # include <sys/syscall.h>
 
-#if defined __NR_sendmmsg || defined HAVE_SENDMMSG
+#if (defined __NR_sendmmsg || defined HAVE_SENDMMSG) \
+ && (defined __NR_recvmmsg || defined HAVE_RECVMMSG)
 
 # include <assert.h>
 # include <errno.h>
@@ -64,13 +65,13 @@ recv_mmsg(int fd, struct mmsghdr *vec, unsigned int vlen, unsigned int flags,
 	  struct timespec *timeout)
 {
 	int rc;
-#ifdef __NR_sendmmsg
+#ifdef __NR_recvmmsg
 	rc = syscall(__NR_recvmmsg, (long) fd, vec, (unsigned long) vlen,
 		     (unsigned long) flags, timeout);
 	if (rc >= 0 || ENOSYS != errno)
 		return rc;
 #endif
-#ifdef HAVE_SENDMMSG
+#ifdef HAVE_RECVMMSG
 	rc = recvmmsg(fd, vec, vlen, flags, timeout);
 #endif
 	return rc;
@@ -140,6 +141,6 @@ main(void)
 
 #else
 
-SKIP_MAIN_UNDEFINED("__NR_sendmmsg || HAVE_SENDMMSG")
+SKIP_MAIN_UNDEFINED("(__NR_sendmmsg || HAVE_SENDMMSG) && (__NR_recvmmsg || HAVE_RECVMMSG)")
 
 #endif