c_src: Fix uname in Makefile

Signed-off-by: Jean Privat <jean@pryen.org>

diff --git a/c_src/Makefile b/c_src/Makefile
index 21e2edc..3dbc4f3 100644 (file)
--- a/c_src/Makefile
+++ b/c_src/Makefile
@@ -6,7 +6,7 @@ LDFLAGS ?=
 LDLIBS  ?= -lm -lgc
 
 NEED_LIBUNWIND := YesPlease
-uname_S := $(shell sh -c 'uname -s null || echo not')
+uname_S := $(shell sh -c 'uname -s 2>/dev/null || echo not')
 ifeq ($(uname_S),Darwin)
        NEED_LIBUNWIND :=
 endif