Since its going directly to the syscall to avoid not having
memfd_create() available in some systems, do the same for its
MFD_CLOEXEC flags, defining it if not available.
This fixes the build in those systems, noticed while building perf on a
set of build containers.
Fixes: 9fa5e1a180aa639f ("libbpf: Call memfd_create() syscall directly")
Cc: Andrii Nakryiko <andrii@xxxxxxxxxx>
Cc: Daniel Borkmann <daniel@xxxxxxxxxxxxx>
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
tools/lib/bpf/libbpf.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c
index efab29b8935bd9f7..635a38c6f947a34d 100644
--- a/tools/lib/bpf/libbpf.c
+++ b/tools/lib/bpf/libbpf.c
@@ -1650,6 +1650,10 @@ static int sys_memfd_create(const char *name, unsigned flags)
return syscall(__NR_memfd_create, name, flags);
}
+#ifndef MFD_CLOEXEC
+#define MFD_CLOEXEC 0x0001U
+#endif
+
static int create_placeholder_fd(void)
{
int fd;
--
2.44.0
