[libvirt] [PATCH] domtop: Fix build on mingw

[Michal Privoznik]

Firstly, there's no sigaction() nor struct sigaction on mingw. We have
to use the one implemented by gnulib (and hence link with gnulib).
Then, for some reason one header file from windows defines ERROR
symbol. Yes it does. Sigh.

Signed-off-by: Michal Privoznik <mprivozn at redhat.com>
---
 examples/domtop/Makefile.am |  6 ++++--
 examples/domtop/domtop.c    | 17 +++++++++++++++++
 2 files changed, 21 insertions(+), 2 deletions(-)

diff --git a/examples/domtop/Makefile.am b/examples/domtop/Makefile.am
index c5cb6c7..dbebb46 100644
--- a/examples/domtop/Makefile.am
+++ b/examples/domtop/Makefile.am
@@ -16,9 +16,11 @@
 ## License along with this library.  If not, see
 ## <http://www.gnu.org/licenses/>.
 
-INCLUDES = -I$(top_builddir)/include -I$(top_srcdir)/include
+INCLUDES = -I$(top_builddir)/include -I$(top_srcdir)/include \
+           -I$(top_builddir)/gnulib/lib -I$(top_srcdir)/gnulib/lib \
+           -I$(top_srcdir)
 LDADDS = $(STATIC_BINARIES) $(WARN_CFLAGS) $(top_builddir)/src/libvirt.la \
-	$(COVERAGE_LDFLAGS)
+         $(top_builddir)/gnulib/lib/libgnu.la $(COVERAGE_LDFLAGS)
 
 noinst_PROGRAMS=domtop
 
diff --git a/examples/domtop/domtop.c b/examples/domtop/domtop.c
index 4ac7889..af5da46 100644
--- a/examples/domtop/domtop.c
+++ b/examples/domtop/domtop.c
@@ -20,6 +20,8 @@
  * Author: Michal Privoznik <mprivozn at redhat.com>
  */
 
+#include <config.h>
+
 #include <errno.h>
 #include <getopt.h>
 #include <libvirt/libvirt.h>
@@ -35,6 +37,21 @@
 static bool debug;
 static bool run_top;
 
+/* On mingw, there's a header file that poisons the well:
+ *
+ *
+ *  CC       domtop.o
+ *domtop.c:40:0: warning: "ERROR" redefined [enabled by default]
+ * #define ERROR(...)                                              \
+ * ^
+ *In file included from /usr/i686-w64-mingw32/sys-root/mingw/include/windows.h:71:0,
+ *                 from /usr/i686-w64-mingw32/sys-root/mingw/include/winsock2.h:23,
+ *                 from ../../gnulib/lib/unistd.h:48,
+ *                 from domtop.c:35:
+ * /usr/i686-w64-mingw32/sys-root/mingw/include/wingdi.h:75:0: note: this is the location of the previous definition
+ * #define ERROR 0
+ */
+#undef ERROR
 #define ERROR(...)                                              \
 do {                                                            \
     fprintf(stderr, "ERROR %s:%d : ", __FUNCTION__, __LINE__);  \
-- 
1.8.5.5