kbuild: fix a bug of C++ host program handling

The comment claims:
  C++ executables compiled from at least one .cc file
  and zero or more .c files

But C++ executables with zero .c file fail in build.

For example, assume we have a Makefile like this:

  hostprogs-y := foo
  foo-cxxobjs := bar.o

In this case, foo is treated as host-csingle
and Kbuild tries to search non-existing foo.c source.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Signed-off-by: Michal Marek <mmarek@suse.cz>

diff --git a/scripts/Makefile.host b/scripts/Makefile.host
index 395a2403593f69d541d618351813d7afbc1742b7..bf44e7988bf45b897c3c1d8ec36567453e78abe8 100644 (file)
--- a/scripts/Makefile.host
+++ b/scripts/Makefile.host
@@ -34,7 +34,8 @@ __hostprogs := $(sort $(hostprogs-y) $(hostprogs-m))
 
 # C code
 # Executables compiled from a single .c file
-host-csingle   := $(foreach m,$(__hostprogs),$(if $($(m)-objs),,$(m)))
+host-csingle   := $(foreach m,$(__hostprogs), \
+                       $(if $($(m)-objs)$($(m)-cxxobjs),,$(m)))
 
 # C executables linked based on several .o files
 host-cmulti    := $(foreach m,$(__hostprogs),\