[PATCH] compat/bswap: add include header guards

[Jeff King <peff@peff.net>]

On Wed, Mar 06, 2019 at 02:28:01PM +0900, Junio C Hamano wrote:

> > +#ifndef COMPAT_BSWAP_H
> > +#define COMPAT_BSWAP_H
> [...]
> 
> This probably is worth having as an independent clean-up.

Yeah, let's do that now before we forget.

-- >8 --
Subject: [PATCH] compat/bswap: add include header guards

Our compat/bswap.h lacks the usual preprocessor guards against multiple
inclusion. This usually isn't an issue since it only gets included from
git-compat-util.h, which has its own guards. But it would produce
redeclaration errors if any file included it separately.

Our hdr-check target would complain about this, except that it currently
skips items in compat/ entirely.

Signed-off-by: Jeff King <peff@peff.net>
---
 compat/bswap.h | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/compat/bswap.h b/compat/bswap.h
index 5078ce5ecc..e4e25735ce 100644
--- a/compat/bswap.h
+++ b/compat/bswap.h
@@ -1,3 +1,6 @@
+#ifndef COMPAT_BSWAP_H
+#define COMPAT_BSWAP_H
+
 /*
  * Let's make sure we always have a sane definition for ntohl()/htonl().
  * Some libraries define those as a function call, just to perform byte
@@ -210,3 +213,5 @@ static inline void put_be64(void *ptr, uint64_t value)
 }
 
 #endif
+
+#endif /* COMPAT_BSWAP_H */
-- 
2.21.0.699.ge1748d4d73