[PATCH 02/12] kbuild: add pre-bootloader (pbl) target
Jean-Christophe PLAGNIOL-VILLARD
plagnioj at jcrosoft.com
Fri Jul 27 14:33:00 EDT 2012
This will allow to link compiled object to the built-in-pbl.o across the source
tree that will be finally link to the pbl.
Now we compile the source %.c in pbl-%.o and provide -D__PBL__
so we can known in the source when it's compile for barebox or the pbl.
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj at jcrosoft.com>
---
Makefile | 5 ++++-
scripts/Makefile.build | 48 +++++++++++++++++++++++++++++++++++++++++++++---
scripts/Makefile.lib | 14 ++++++++++++++
3 files changed, 63 insertions(+), 4 deletions(-)
diff --git a/Makefile b/Makefile
index ac5eaaf..168381d 100644
--- a/Makefile
+++ b/Makefile
@@ -481,6 +481,7 @@ barebox-alldirs := $(sort $(barebox-dirs) $(patsubst %/,%,$(filter %/, \
$(core-n) $(core-) $(drivers-n) $(drivers-) \
$(net-n) $(net-) $(libs-n) $(libs-))))
+pbl-common-y := $(patsubst %/, %/built-in-pbl.o, $(common-y))
common-y := $(patsubst %/, %/built-in.o, $(common-y))
# Build barebox
@@ -510,6 +511,8 @@ common-y := $(patsubst %/, %/built-in.o, $(common-y))
# System.map is generated to document addresses of all kernel symbols
barebox-common := $(common-y)
+barebox-pbl-common := $(pbl-common-y)
+export barebox-pbl-common
barebox-all := $(barebox-common)
barebox-lds := $(lds-y)
@@ -714,7 +717,7 @@ barebox.srec: barebox
# The actual objects are generated when descending,
# make sure no implicit rule kicks in
-$(sort $(barebox-head) $(barebox-common) ) $(barebox-lds): $(barebox-dirs) ;
+$(sort $(barebox-head) $(barebox-common) ) $(barebox-lds) $(barebox-pbl-common): $(barebox-dirs) ;
# Handle descending into subdirectories listed in $(barebox-dirs)
# Preset locale variables to speed up the build process. Limit locale
diff --git a/scripts/Makefile.build b/scripts/Makefile.build
index 1a82c44..e5b7779 100644
--- a/scripts/Makefile.build
+++ b/scripts/Makefile.build
@@ -14,6 +14,7 @@ obj-y :=
obj-m :=
lib-y :=
lib-m :=
+pbl-y :=
always :=
targets :=
subdir-y :=
@@ -97,13 +98,19 @@ ifneq ($(strip $(lib-y) $(lib-m) $(lib-n) $(lib-)),)
lib-target := $(obj)/lib.a
endif
-ifneq ($(strip $(obj-y) $(obj-m) $(obj-n) $(obj-) $(lib-target)),)
+ifneq ($(strip $(obj-y) $(obj-m) $(obj-n) $(obj-) $(lib-target) $(pbl-y)),)
builtin-target := $(obj)/built-in.o
endif
+ifeq ($(CONFIG_PBL_IMAGE), y)
+ifneq ($(strip $(pbl-y) $(builtin-target)),)
+pbl-target := $(obj)/built-in-pbl.o
+endif
+endif
+
# We keep a list of all modules in $(MODVERDIR)
-__build: $(if $(KBUILD_BUILTIN),$(builtin-target) $(lib-target) $(extra-y)) \
+__build: $(if $(KBUILD_BUILTIN),$(builtin-target) $(lib-target) $(pbl-target) $(extra-y)) \
$(if $(KBUILD_MODULES),$(obj-m)) \
$(subdir-ym) $(always)
@:
@@ -177,9 +184,11 @@ cmd_cc_symtypes_c = \
# (See cmd_cc_o_c + relevant part of rule_cc_o_c)
quiet_cmd_cc_o_c = CC $(quiet_modtag) $@
+quiet_cmd_pbl_cc_o_c = PBLCC $@
ifndef CONFIG_MODVERSIONS
cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
+cmd_pbl_cc_o_c = $(CC) -D__PBL__ $(c_flags) -c -o $@ $<
else
# When module versioning is enabled the following steps are executed:
@@ -220,8 +229,22 @@ define rule_cc_o_c
mv -f $(dot-target).tmp $(dot-target).cmd
endef
+define rule_pbl_cc_o_c
+ $(call echo-cmd,checksrc) $(cmd_checksrc) \
+ $(call echo-cmd,pbl_cc_o_c) $(cmd_pbl_cc_o_c); \
+ $(cmd_modversions) \
+ scripts/basic/fixdep $(depfile) $@ '$(call make-cmd,pbl_cc__o_c)' > \
+ $(dot-target).tmp; \
+ rm -f $(depfile); \
+ mv -f $(dot-target).tmp $(dot-target).cmd
+endef
+
# Built-in and composite module parts
+pbl-%.o: %.c
+ $(call cmd,force_checksrc)
+ $(call if_changed_rule,pbl_cc_o_c)
+
%.o: %.c FORCE
$(call cmd,force_checksrc)
$(call if_changed_rule,cc_o_c)
@@ -258,10 +281,16 @@ cmd_as_s_S = $(CPP) $(a_flags) -o $@ $<
quiet_cmd_as_o_S = AS $(quiet_modtag) $@
cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
+quiet_cmd_pbl_as_o_S = PBLAS $@
+cmd_pbl_as_o_S = $(CC) -D__PBL__ $(a_flags) -c -o $@ $<
+
+pbl-%.o: %.S
+ $(call if_changed_dep,pbl_as_o_S)
+
%.o: %.S FORCE
$(call if_changed_dep,as_o_S)
-targets += $(real-objs-y) $(real-objs-m) $(lib-y)
+targets += $(real-objs-y) $(real-objs-m) $(lib-y) $(pbl-y)
targets += $(extra-y) $(MAKECMDGOALS) $(always)
# Linker scripts preprocessor (.lds.S -> .lds)
@@ -294,6 +323,19 @@ $(builtin-target): $(obj-y) FORCE
targets += $(builtin-target)
endif # builtin-target
+ifdef pbl-target
+quiet_cmd_pbl_link_o_target = PBLLD $@
+# If the list of objects to link is empty, just create an empty built-in-pbl.o
+cmd_pbl_link_o_target = $(if $(strip $(pbl-y)),\
+ $(LD) $(ld_flags) -r -o $@ $(filter $(pbl-y), $^),\
+ rm -f $@; $(AR) rcs $@)
+
+$(pbl-target): $(pbl-y) FORCE
+ $(call if_changed,pbl_link_o_target)
+
+targets += $(pbl-target)
+endif # pbl-target
+
#
# Rule to compile a set of .o files into one .a file
#
diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib
index b842c48..1a5b2b5 100644
--- a/scripts/Makefile.lib
+++ b/scripts/Makefile.lib
@@ -21,6 +21,17 @@ lib-y := $(filter-out $(obj-y), $(sort $(lib-y) $(lib-m)))
# o if we encounter foo/ in $(obj-m), remove it from $(obj-m)
# and add the directory to the list of dirs to descend into: $(subdir-m)
+# for non dirs add pbl- prefix to the target
+# so we recompile the source with custom flags and custom quiet
+__pbl-y := $(notdir $(pbl-y))
+pbl-y := $(patsubst %.o,pbl-%.o,$(__pbl-y))
+# add subdir from $(obj-y) too so we do not need to have the dir define in
+# both $(obj-y) and $(pbl-y)
+__pbl-y := $(filter-out $(pbl-y), $(filter %/, $(obj-y)))
+pbl-y += $(__pbl-y)
+
+pbl-y := $(sort $(patsubst %/, %/built-in-pbl.o, $(pbl-y)))
+
__subdir-y := $(patsubst %/,%,$(filter %/, $(obj-y)))
subdir-y += $(__subdir-y)
__subdir-m := $(patsubst %/,%,$(filter %/, $(obj-m)))
@@ -46,7 +57,9 @@ multi-objs := $(multi-objs-y) $(multi-objs-m)
# $(subdir-obj-y) is the list of objects in $(obj-y) which do not live
# in the local directory
+__subdir-obj-y := $(foreach o,$(pbl-y),$(if $(filter-out $(o),$(notdir $(o))),$(o)))
subdir-obj-y := $(foreach o,$(obj-y),$(if $(filter-out $(o),$(notdir $(o))),$(o)))
+subdir-obj-y += $(__subdir-obj-y)
# $(obj-dirs) is a list of directories that contain object files
obj-dirs := $(dir $(multi-objs) $(subdir-obj-y))
@@ -63,6 +76,7 @@ targets := $(addprefix $(obj)/,$(targets))
obj-y := $(addprefix $(obj)/,$(obj-y))
obj-m := $(addprefix $(obj)/,$(obj-m))
lib-y := $(addprefix $(obj)/,$(lib-y))
+pbl-y := $(addprefix $(obj)/,$(pbl-y))
subdir-obj-y := $(addprefix $(obj)/,$(subdir-obj-y))
real-objs-y := $(addprefix $(obj)/,$(real-objs-y))
real-objs-m := $(addprefix $(obj)/,$(real-objs-m))
--
1.7.10.4
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