[libvirt] [PATCH] build: fix build on non-Linux
A cygwin build of 1.2.9 fails with:
util/virprocess.c:87:27: fatal error: sys/syscall.h: No such file or directory
# include <sys/syscall.h>
But in reality, the ONLY user of setns() is lxc, which is Linux-only.
It's easiest to just limit the setns workarounds to Linux.
* src/util/virprocess.c (setns): Limit definition to Linux.
Signed-off-by: Eric Blake <eblake(a)redhat.com>
---
Pushing under the build-breaker rule.
src/util/virprocess.c | 44 ++++++++++++++++++++++++--------------------
1 file changed, 24 insertions(+), 20 deletions(-)
diff --git a/src/util/virprocess.c b/src/util/virprocess.c
index 806e7f9..486123a 100644
--- a/src/util/virprocess.c
+++ b/src/util/virprocess.c
@@ -61,44 +61,48 @@
VIR_LOG_INIT("util.process");
+#ifdef __linux__
/*
* Workaround older glibc. While kernel may support the setns
* syscall, the glibc wrapper might not exist. If that's the
* case, use our own.
*/
-#ifndef __NR_setns
-# if defined(__x86_64__)
-# define __NR_setns 308
-# elif defined(__i386__)
-# define __NR_setns 346
-# elif defined(__arm__)
-# define __NR_setns 375
-# elif defined(__aarch64__)
-# define __NR_setns 375
-# elif defined(__powerpc__)
-# define __NR_setns 350
-# elif defined(__s390__)
-# define __NR_setns 339
+# ifndef __NR_setns
+# if defined(__x86_64__)
+# define __NR_setns 308
+# elif defined(__i386__)
+# define __NR_setns 346
+# elif defined(__arm__)
+# define __NR_setns 375
+# elif defined(__aarch64__)
+# define __NR_setns 375
+# elif defined(__powerpc__)
+# define __NR_setns 350
+# elif defined(__s390__)
+# define __NR_setns 339
+# endif
# endif
-#endif
-#ifndef HAVE_SETNS
-# if defined(__NR_setns) && !defined(WIN32)
-# include <sys/syscall.h>
+# ifndef HAVE_SETNS
+# if defined(__NR_setns)
+# include <sys/syscall.h>
static inline int setns(int fd, int nstype)
{
return syscall(__NR_setns, fd, nstype);
}
-# else /* __NR_setns && !WIN32 */
+# else /* !__NR_setns */
+# error Please determine the syscall number for setns on your architecture
+# endif
+# endif
+#else /* !__linux__ */
static inline int setns(int fd ATTRIBUTE_UNUSED, int nstype ATTRIBUTE_UNUSED)
{
virReportSystemError(ENOSYS, "%s",
_("Namespaces are not supported on this platform."));
return -1;
}
-# endif /* __NR_setns && !WIN32 */
-#endif /* HAVE_SETNS */
+#endif
/**
* virProcessTranslateStatus:
--
1.9.3