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Makefile: Add support for generating C array at compile time

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Generating C array at compile time based on details provided by
objects.mk is a very useful feature which will help us compile
only a subset of drivers or modules.

We add a bash script (carray.sh) which takes array details and
object/variable list from command-line to generate a C source
containing array of object/variable pointers. We also extend
top-level makefile to use carray.sh whenever specified through
objects.mk.

Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Atish Patra <atishp@rivosinc.com>
This commit is contained in:
Anup Patel
2022-05-13 09:26:00 +05:30
committed by Anup Patel
parent f726f2dc01
commit 7fb474b9dd
2 changed files with 88 additions and 0 deletions
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Makefile
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@@ -404,6 +404,10 @@ compile_d2c = $(CMD_PREFIX)mkdir -p `dirname $(1)`; \
$(if $($(2)-varprefix-$(3)),$(eval D2C_NAME_PREFIX := $($(2)-varprefix-$(3))),$(eval D2C_NAME_PREFIX := $(5))) \
$(if $($(2)-padding-$(3)),$(eval D2C_PADDING_BYTES := $($(2)-padding-$(3))),$(eval D2C_PADDING_BYTES := 0)) \
$(src_dir)/scripts/d2c.sh -i $(6) -a $(D2C_ALIGN_BYTES) -p $(D2C_NAME_PREFIX) -t $(D2C_PADDING_BYTES) > $(1)
compile_carray = $(CMD_PREFIX)mkdir -p `dirname $(1)`; \
echo " CARRAY $(subst $(build_dir)/,,$(1))"; \
$(eval CARRAY_VAR_LIST := $(carray-$(subst .c,,$(shell basename $(1)))-y)) \
$(src_dir)/scripts/carray.sh -i $(2) -l "$(CARRAY_VAR_LIST)" > $(1)
compile_gen_dep = $(CMD_PREFIX)mkdir -p `dirname $(1)`; \
echo " GEN-DEP $(subst $(build_dir)/,,$(1))"; \
echo "$(1:.dep=$(2)): $(3)" >> $(1)
@@ -451,6 +455,13 @@ $(build_dir)/%.dep: $(src_dir)/%.S
$(build_dir)/%.o: $(src_dir)/%.S
$(call compile_as,$@,$<)
$(build_dir)/%.dep: $(src_dir)/%.carray
$(call compile_gen_dep,$@,.c,$<)
$(call compile_gen_dep,$@,.o,$(@:.dep=.c))
$(build_dir)/%.c: $(src_dir)/%.carray
$(call compile_carray,$@,$<)
$(platform_build_dir)/%.bin: $(platform_build_dir)/%.elf
$(call compile_objcopy,$@,$<)