[PATCH] Makefile: add missing mkdir MANUAL_BUILDDIR

[Stefan Hajnoczi]

The MANUAL_BUILDDIR directory is automatically created by sphinx-build
for the other targets.  The index.html target does not use sphinx-build
so we must manually create the directory to avoid the following error:

  GEN     docs/built/index.html
  /bin/sh: docs/built/index.html: No such file or directory

Signed-off-by: Stefan Hajnoczi <address@hidden>
---
 Makefile | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Makefile b/Makefile
index afa5cb6548..6562b0dc97 100644
--- a/Makefile
+++ b/Makefile
@@ -1022,6 +1022,7 @@ $(MANUAL_BUILDDIR)/interop/qemu-ga.8: $(call 
manual-deps,interop)
        $(call build-manual,interop,man)
 
 $(MANUAL_BUILDDIR)/index.html: $(SRC_PATH)/docs/index.html.in qemu-version.h
+       @mkdir -p "$(MANUAL_BUILDDIR)"
        $(call quiet-command, sed "s|@@VERSION@@|${VERSION}|g" $< >$@, \
              "GEN","$@")
 
-- 
2.24.1