x86: simplify "make ARCH=x86" and fix kconfig all.config

[sfrench/cifs-2.6.git] / scripts / Makefile.build

diff --git a/scripts/Makefile.build b/scripts/Makefile.build
index e2ad2dccccdb70f387317c1ef91292b150e98150..de9836eee8bbba866312ce4e5c22f05caef98486 100644 (file)
--- a/scripts/Makefile.build
+++ b/scripts/Makefile.build
@@ -7,15 +7,45 @@ src := $(obj)
 PHONY := __build
 __build:
 
+# Init all relevant variables used in kbuild files so
+# 1) they have correct type
+# 2) they do not inherit any value from the environment
+obj-y :=
+obj-m :=
+lib-y :=
+lib-m :=
+always :=
+targets :=
+subdir-y :=
+subdir-m :=
+EXTRA_AFLAGS   :=
+EXTRA_CFLAGS   :=
+EXTRA_CPPFLAGS :=
+EXTRA_LDFLAGS  :=
+asflags-y  :=
+ccflags-y  :=
+cppflags-y :=
+ldflags-y  :=
+
 # Read .config if it exist, otherwise ignore
 -include include/config/auto.conf
 
 include scripts/Kbuild.include
 
+# For backward compatibility check that these variables does not change
+save-cflags := $(CFLAGS)
+
 # The filename Kbuild has precedence over Makefile
 kbuild-dir := $(if $(filter /%,$(src)),$(src),$(srctree)/$(src))
-include $(if $(wildcard $(kbuild-dir)/Kbuild), $(kbuild-dir)/Kbuild, $(kbuild-dir)/Makefile)
-
+kbuild-file := $(if $(wildcard $(kbuild-dir)/Kbuild),$(kbuild-dir)/Kbuild,$(kbuild-dir)/Makefile)
+include $(kbuild-file)
+
+# If the save-* variables changed error out
+ifeq ($(KBUILD_NOPEDANTIC),)
+        ifneq ("$(save-cflags)","$(CFLAGS)")
+                $(error CFLAGS was changed in "$(kbuild-file)". Fix it to use EXTRA_CFLAGS)
+        endif
+endif
 include scripts/Makefile.lib
 
 ifdef host-progs
@@ -39,31 +69,6 @@ _dummy := $(shell [ -d $(obj) ] || mkdir -p $(obj))
 _dummy := $(foreach d,$(obj-dirs), $(shell [ -d $(d) ] || mkdir -p $(d)))
 endif
 
-
-ifdef EXTRA_TARGETS
-$(warning kbuild: $(obj)/Makefile - Usage of EXTRA_TARGETS is obsolete in 2.6. Please fix!)
-endif
-
-ifdef build-targets
-$(warning kbuild: $(obj)/Makefile - Usage of build-targets is obsolete in 2.6. Please fix!)
-endif
-
-ifdef export-objs
-$(warning kbuild: $(obj)/Makefile - Usage of export-objs is obsolete in 2.6. Please fix!)
-endif
-
-ifdef O_TARGET
-$(warning kbuild: $(obj)/Makefile - Usage of O_TARGET := $(O_TARGET) is obsolete in 2.6. Please fix!)
-endif
-
-ifdef L_TARGET
-$(error kbuild: $(obj)/Makefile - Use of L_TARGET is replaced by lib-y in 2.6. Please fix!)
-endif
-
-ifdef list-multi
-$(warning kbuild: $(obj)/Makefile - list-multi := $(list-multi) is obsolete in 2.6. Please fix!)
-endif
-
 ifndef obj
 $(warning kbuild: Makefile.build is included improperly)
 endif
@@ -131,13 +136,13 @@ $(multi-objs-y:.o=.lst) : modname = $(modname-multi)
 quiet_cmd_cc_s_c = CC $(quiet_modtag)  $@
 cmd_cc_s_c       = $(CC) $(c_flags) -fverbose-asm -S -o $@ $<
 
-%.s: %.c FORCE
+$(obj)/%.s: $(src)/%.c FORCE
        $(call if_changed_dep,cc_s_c)
 
 quiet_cmd_cc_i_c = CPP $(quiet_modtag) $@
 cmd_cc_i_c       = $(CPP) $(c_flags)   -o $@ $<
 
-%.i: %.c FORCE
+$(obj)/%.i: $(src)/%.c FORCE
        $(call if_changed_dep,cc_i_c)
 
 quiet_cmd_cc_symtypes_c = SYM $(quiet_modtag) $@
@@ -146,7 +151,7 @@ cmd_cc_symtypes_c      = \
                | $(GENKSYMS) -T $@ >/dev/null;                         \
                test -s $@ || rm -f $@
 
-%.symtypes : %.c FORCE
+$(obj)/%.symtypes : $(src)/%.c FORCE
        $(call if_changed_dep,cc_symtypes_c)
 
 # C (.c) files
@@ -198,14 +203,13 @@ define rule_cc_o_c
 endef
 
 # Built-in and composite module parts
-
-%.o: %.c FORCE
+$(obj)/%.o: $(src)/%.c FORCE
        $(call cmd,force_checksrc)
        $(call if_changed_rule,cc_o_c)
 
 # Single-part modules are special since we need to mark them in $(MODVERDIR)
 
-$(single-used-m): %.o: %.c FORCE
+$(single-used-m): $(obj)/%.o: $(src)/%.c FORCE
        $(call cmd,force_checksrc)
        $(call if_changed_rule,cc_o_c)
        @{ echo $(@:.o=.ko); echo $@; } > $(MODVERDIR)/$(@F:.o=.mod)
@@ -215,7 +219,7 @@ quiet_cmd_cc_lst_c = MKLST   $@
                     $(CONFIG_SHELL) $(srctree)/scripts/makelst $*.o \
                                     System.map $(OBJDUMP) > $@
 
-%.lst: %.c FORCE
+$(obj)/%.lst: $(src)/%.c FORCE
        $(call if_changed_dep,cc_lst_c)
 
 # Compile assembler sources (.S)
@@ -229,13 +233,13 @@ $(real-objs-m:.o=.s): modkern_aflags := $(AFLAGS_MODULE)
 quiet_cmd_as_s_S = CPP $(quiet_modtag) $@
 cmd_as_s_S       = $(CPP) $(a_flags)   -o $@ $< 
 
-%.s: %.S FORCE
+$(obj)/%.s: $(src)/%.S FORCE
        $(call if_changed_dep,as_s_S)
 
 quiet_cmd_as_o_S = AS $(quiet_modtag)  $@
 cmd_as_o_S       = $(CC) $(a_flags) -c -o $@ $<
 
-%.o: %.S FORCE
+$(obj)/%.o: $(src)/%.S FORCE
        $(call if_changed_dep,as_o_S)
 
 targets += $(real-objs-y) $(real-objs-m) $(lib-y)
@@ -246,7 +250,7 @@ targets += $(extra-y) $(MAKECMDGOALS) $(always)
 quiet_cmd_cpp_lds_S = LDS     $@
       cmd_cpp_lds_S = $(CPP) $(cpp_flags) -D__ASSEMBLY__ -o $@ $<
 
-%.lds: %.lds.S FORCE
+$(obj)/%.lds: $(src)/%.lds.S FORCE
        $(call if_changed_dep,cpp_lds_S)
 
 # Build the compiled-in targets
@@ -276,7 +280,7 @@ endif # builtin-target
 #
 ifdef lib-target
 quiet_cmd_link_l_target = AR      $@
-cmd_link_l_target = rm -f $@; $(AR) $(EXTRA_ARFLAGS) rcs $@ $(lib-y)
+cmd_link_l_target = rm -f $@; $(AR) rcs $@ $(lib-y)
 
 $(lib-target): $(lib-y) FORCE
        $(call if_changed,link_l_target)
@@ -300,7 +304,7 @@ quiet_cmd_link_multi-y = LD      $@
 cmd_link_multi-y = $(LD) $(ld_flags) -r -o $@ $(link_multi_deps)
 
 quiet_cmd_link_multi-m = LD [M]  $@
-cmd_link_multi-m = $(LD) $(ld_flags) $(LDFLAGS_MODULE) -o $@ $(link_multi_deps)
+cmd_link_multi-m = $(cmd_link_multi-y)
 
 # We would rather have a list of rules like
 #      foo.o: $(foo-objs)