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[RFC,v9,02/11] trace-cmd: Detect if vsockets are available

Message ID 20190402134540.32321-3-kaslevs@vmware.com (mailing list archive)
State Superseded
Headers show
Series Add VM kernel tracing over vsockets and FIFOs | expand

Commit Message

Slavomir Kaslev April 2, 2019, 1:45 p.m. UTC 
From: "Steven Rostedt (VMware)" <rostedt@goodmis.org>

Detect and define VSOCK if vsockets are available on the system.
This macro is used to disable VM remote tracing features on older kernels.

Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: Slavomir Kaslev <kaslevs@vmware.com>
---
 Makefile | 7 +++++++
 1 file changed, 7 insertions(+)
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Patch

diff --git a/Makefile b/Makefile
index b780718..99e4f39 100644
--- a/Makefile
+++ b/Makefile
@@ -204,6 +204,13 @@  CFLAGS ?= -g -Wall
 CPPFLAGS ?=
 LDFLAGS ?=
 
+VSOCK_DEFINED := $(shell if (echo "\#include <linux/vm_sockets.h>" | $(CC) -E - >/dev/null 2>&1) ; then echo 1; else echo 0 ; fi)
+
+export VSOCK_DEFINED
+ifeq ($(VSOCK_DEFINED), 1)
+CFLAGS += -DVSOCK
+endif
+
 export CFLAGS
 export INCLUDES