[SHELL] Use uninitialized_var to silence bogus warnings

gcc generates bogus warnings about uninitialised variables in parser.c.
This patch borrows the uninitialized_var macro from Linux to silence
them.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

1 files changed, 6 insertions, 0 deletions

diff --git a/src/system.h b/src/system.h
index b8853e6..17a9533 100644
--- a/src/system.h
+++ b/src/system.h
@@ -97,3 +97,9 @@ static inline int killpg(pid_t pid, int signal)
 #define _SC_CLK_TCK 2
 long sysconf(int) __attribute__((__noreturn__));
 #endif
+
+/*
+ * A trick to suppress uninitialized variable warning without generating any
+ * code
+ */
+#define uninitialized_var(x) x = x