kbuild: fix ia64 breakage after introducing make -rR

kbuild used $¤(*F to get filename of target without extension.
This was used in several places all over kbuild, but introducing
make -rR broke his for all cases where we specified full path to
target/prerequsite. It is assumed that make -rR disables old style
suffix-rules which is why is suddenly failed.

ia64 was impacted by this change because several div* routines in
arch/ia64/lib are build using explicit paths and then kbuild failed.

Thanks to David Mosberger-Tang <David.Mosberger@acm.org> for an explanation
what was the root-cause and for testing on ia64.

This patch also fixes two uses of $(*F) in arch/um

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>

5 files changed, 13 insertions, 7 deletions

diff --git a/scripts/Kbuild.include b/scripts/Kbuild.include
index b0d067be7390..2180c88cfe89 100644
--- a/scripts/Kbuild.include
+++ b/scripts/Kbuild.include
@@ -13,6 +13,10 @@ space   := $(empty) $(empty)
 depfile = $(subst $(comma),_,$(@D)/.$(@F).d)
 
 ###
+# filename of target with directory and extension stripped
+basetarget = $(basename $(notdir $@))
+
+###
 # Escape single quote for use in echo statements
 escsq = $(subst $(squote),'\$(squote)',$1)
 
diff --git a/scripts/Makefile.build b/scripts/Makefile.build
index 02a7eea5fdbc..3cb445cc7432 100644
--- a/scripts/Makefile.build
+++ b/scripts/Makefile.build
@@ -117,7 +117,7 @@ $(real-objs-m:.o=.lst): quiet_modtag := [M]
 $(obj-m)              : quiet_modtag := [M]
 
 # Default for not multi-part modules
-modname = $(*F)
+modname = $(basetarget)
 
 $(multi-objs-m)         : modname = $(modname-multi)
 $(multi-objs-m:.o=.i)   : modname = $(modname-multi)
diff --git a/scripts/Makefile.host b/scripts/Makefile.host
index 2b066d12af2c..18ecd4d5df7f 100644
--- a/scripts/Makefile.host
+++ b/scripts/Makefile.host
@@ -80,8 +80,10 @@ obj-dirs += $(host-objdirs)
 #####
 # Handle options to gcc. Support building with separate output directory
 
-_hostc_flags   = $(HOSTCFLAGS)   $(HOST_EXTRACFLAGS)   $(HOSTCFLAGS_$(*F).o)
-_hostcxx_flags = $(HOSTCXXFLAGS) $(HOST_EXTRACXXFLAGS) $(HOSTCXXFLAGS_$(*F).o)
+_hostc_flags   = $(HOSTCFLAGS)   $(HOST_EXTRACFLAGS)   \
+                 $(HOSTCFLAGS_$(basetarget).o)
+_hostcxx_flags = $(HOSTCXXFLAGS) $(HOST_EXTRACXXFLAGS) \
+                 $(HOSTCXXFLAGS_$(basetarget).o)
 
 ifeq ($(KBUILD_SRC),)
 __hostc_flags   = $(_hostc_flags)
diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib
index 2cb4935e85d1..fc498fee68ed 100644
--- a/scripts/Makefile.lib
+++ b/scripts/Makefile.lib
@@ -82,12 +82,12 @@ obj-dirs	:= $(addprefix $(obj)/,$(obj-dirs))
 #       than one module. In that case KBUILD_MODNAME will be set to foo_bar,
 #       where foo and bar are the name of the modules.
 name-fix = $(subst $(comma),_,$(subst -,_,$1))
-basename_flags = -D"KBUILD_BASENAME=KBUILD_STR($(call name-fix,$(*F)))"
+basename_flags = -D"KBUILD_BASENAME=KBUILD_STR($(call name-fix,$(basetarget)))"
 modname_flags  = $(if $(filter 1,$(words $(modname))),\
                  -D"KBUILD_MODNAME=KBUILD_STR($(call name-fix,$(modname)))")
 
-_c_flags       = $(CFLAGS) $(EXTRA_CFLAGS) $(CFLAGS_$(*F).o)
-_a_flags       = $(AFLAGS) $(EXTRA_AFLAGS) $(AFLAGS_$(*F).o)
+_c_flags       = $(CFLAGS) $(EXTRA_CFLAGS) $(CFLAGS_$(basetarget).o)
+_a_flags       = $(AFLAGS) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o)
 _cpp_flags     = $(CPPFLAGS) $(EXTRA_CPPFLAGS) $(CPPFLAGS_$(@F))
 
 # If building the kernel in a separate objtree expand all occurrences
diff --git a/scripts/Makefile.modpost b/scripts/Makefile.modpost
index 576cce5e387f..a49550205dcc 100644
--- a/scripts/Makefile.modpost
+++ b/scripts/Makefile.modpost
@@ -72,7 +72,7 @@ $(modules:.ko=.mod.c): __modpost ;
 # Step 5), compile all *.mod.c files
 
 # modname is set to make c_flags define KBUILD_MODNAME
-modname = $(*F)
+modname = $(notdir $(@:.mod.o=))
 
 quiet_cmd_cc_o_c = CC      $@
       cmd_cc_o_c = $(CC) $(c_flags) $(CFLAGS_MODULE)    \