kbuild: fix mkmakefile

With the current way of generating the Makefile in the output directory
for builds outside of the source tree, specifying real targets (rather
than phony ones) doesn't work in an already (partially) built tree, as
the stub Makefile doesn't have any dependency information available.
Thus, all targets where files may actually exist must be listed
explicitly and, due to what I'd call a make misbehavior, directory
targets must then also be special cased.

Signed-Off-By: Jan Beulich <jbeulich@novell.com>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>

diff --git a/scripts/mkmakefile b/scripts/mkmakefile
index c4d621b30d0db1649d99f9cebf31377cc2d8d32b..a22cbedd3b3ec0738379c283d4fb2df5b33209ec 100644 (file)
--- a/scripts/mkmakefile
+++ b/scripts/mkmakefile
@@ -21,11 +21,13 @@ KERNELOUTPUT := $2
 
 MAKEFLAGS += --no-print-directory
 
+.PHONY: all \$(MAKECMDGOALS)
+
 all:
        \$(MAKE) -C \$(KERNELSRC) O=\$(KERNELOUTPUT)
 
-%::
-       \$(MAKE) -C \$(KERNELSRC) O=\$(KERNELOUTPUT) \$@
+Makefile:;
 
+\$(filter-out all Makefile,\$(MAKECMDGOALS)) %/:
+       \$(MAKE) -C \$(KERNELSRC) O=\$(KERNELOUTPUT) \$@
 EOF
-