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make: Add bbenv-y target to generate default environment files 

This adds a target to generate environment files from directories.
These are compiled into the barebox binary.

use it as:

bbenv-$(CONFIG_SOMETHING) += my-environment

The directory containing the files to compile into the binary
should be named my-environment.

This can be accessed in C code later as:

extern unsigned char __bbenv_my_environment_start[];
extern unsigned char __bbenv_my_environment_end[];

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
Sascha Hauer 2014-02-18 09:35:09 +01:00
parent 5d22cb3856
commit 068f213bb3
2 changed files with 30 additions and 1 deletions
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2
Makefile
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@ -1022,7 +1022,7 @@ clean: archclean $(clean-dirs)
@find . $(RCS_FIND_IGNORE) \
\( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
-o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
-o -name '*.symtypes' \) \
-o -name '*.symtypes' -o -name '*.bbenv.S' -o -name "*.bbenv" \) \
-type f -print | xargs rm -f
# mrproper - Delete all generated files, including .config

29
scripts/Makefile.lib
View File

@ -98,6 +98,7 @@ multi-objs-y := $(addprefix $(obj)/,$(multi-objs-y))
multi-objs-m := $(addprefix $(obj)/,$(multi-objs-m))
subdir-ym := $(addprefix $(obj)/,$(subdir-ym))
obj-dirs := $(addprefix $(obj)/,$(obj-dirs))
bbenv-y := $(addprefix $(obj)/,$(bbenv-y))
# These flags are needed for modversions and compiling, so we define them here
# already
@ -229,6 +230,34 @@ $(obj)/%.dtb: $(src)/%.dts FORCE
dtc-tmp = $(subst $(comma),_,$(dot-target).dts)
obj-y += $(patsubst %,%.bbenv$(DEFAULT_COMPRESSION_SUFFIX).o,$(bbenv-y))
extra-y += $(patsubst %,%.bbenv$(DEFAULT_COMPRESSION_SUFFIX),$(bbenv-y))
extra-y += $(patsubst %,%.bbenv$(DEFAULT_COMPRESSION_SUFFIX).S,$(bbenv-y))
extra-y += $(patsubst %,%.bbenv$(DEFAULT_COMPRESSION_SUFFIX).o,$(bbenv-y))
quiet_cmd_env_S = ENV.S $@
cmd_env_S = \
( \
echo '\#include <asm-generic/barebox.lds.h>'; \
echo '.section .bbenv.rodata.$(subst -,_,$(*F)),"a"'; \
echo '.balign STRUCT_ALIGNMENT'; \
echo '.global __bbenv_$(subst -,_,$(*F))_start'; \
echo '__bbenv_$(subst -,_,$(*F))_start:'; \
echo '.incbin "$<" '; \
echo '__bbenv_$(subst -,_,$(*F))_end:'; \
echo '.global __bbenv_$(subst -,_,$(*F))_end'; \
echo '.balign STRUCT_ALIGNMENT'; \
) > $@
$(obj)/%.bbenv$(DEFAULT_COMPRESSION_SUFFIX).S: $(src)/%.bbenv$(DEFAULT_COMPRESSION_SUFFIX) FORCE
$(call if_changed,env_S)
quiet_cmd_env = ENV $@
cmd_env=$(srctree)/scripts/genenv $(srctree) $(objtree) $@ $<
%.bbenv$(DEFAULT_COMPRESSION_SUFFIX): % FORCE
$(call cmd,env)
# Bzip2
# ---------------------------------------------------------------------------