[libvirt] [PATCH] build: Solve mingw build clash with DATADIR

[Eric Blake]

Commit fed58d83 was a hack to fix a mingw build failure due to header
inclusion order resulting in a clash over the use of DATADIR, by
repeating a trick made several other times in the past of tweaking
inclusion order until it goes away.  Better is to revert that, and
instead use pragmas to avoid the clash in the first place, regardless
of header ordering, solving it for everyone in the future.

Signed-off-by: Eric Blake <eblake at redhat.com>
---

I tested that both gcc and clang on F29 support this; but it will take
a full CI run to see if everywhere else is okay with it. Thus, it is
not 5.6 material.

 src/util/viratomic.h       | 3 +++
 src/conf/checkpoint_conf.c | 2 --
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/util/viratomic.h b/src/util/viratomic.h
index 35800dafcd..c6e7668324 100644
--- a/src/util/viratomic.h
+++ b/src/util/viratomic.h
@@ -218,7 +218,10 @@ VIR_STATIC unsigned int virAtomicIntXor(volatile unsigned int *atomic,

 # ifdef VIR_ATOMIC_OPS_WIN32

+#  pragma push_macro("DATADIR") /* If "configmake.h" was included first */
+#  undef DATADIR
 #  include <winsock2.h>
+#  pragma pop_macro("DATADIR")
 #  include <windows.h>
 #  include <intrin.h>
 #  if !defined(_M_AMD64) && !defined (_M_IA64) && !defined(_M_X64)
diff --git a/src/conf/checkpoint_conf.c b/src/conf/checkpoint_conf.c
index 5ce4cc4853..5f4c275dd8 100644
--- a/src/conf/checkpoint_conf.c
+++ b/src/conf/checkpoint_conf.c
@@ -21,8 +21,6 @@

 #include <config.h>

-#include <unistd.h>
-
 #include "configmake.h"
 #include "internal.h"
 #include "virbitmap.h"
-- 
2.20.1