Masahiro,
On Mon, Oct 16, 2017 at 11:42 PM, Masahiro Yamada
<yamada.masah...@socionext.com> wrote:
> The pylibfdt is used by dtoc (and, indirectly by binman), but there
> is no reason why it must be generated in the tools/ directory.
>
> Recently, U-Boot switched over to the bundled DTC, and the directory
> structure under scripts/dtc/ now mirrors the upstream DTC project.
> So, scripts/dtc/pylibfdt is the best location.
>
> I also rewrote the Makefile in a cleaner Kbuild style.
>
> The scripts from the upstream have been moved as follows:
>
> lib/libfdt/pylibfdt/setup.py -> scripts/dtc/pylibfdt/setup.py
> lib/libfdt/pylibfdt/libfdt.i -> scripts/dtc/pylibfdt/libfdt.i_shipped
>
> The .i_shipped is coped to .i during building because the .i must be
> located in the objtree when we build it out of tree.
>
> Signed-off-by: Masahiro Yamada <yamada.masah...@socionext.com>
> ---
>
> Makefile | 2 +-
> scripts/Makefile.spl | 4 +--
> scripts/dtc/Makefile | 3 +++
> scripts/dtc/pylibfdt/.gitignore | 4 +++
> scripts/dtc/pylibfdt/Makefile | 30
> ++++++++++++++++++++++
> .../dtc/pylibfdt/libfdt.i_shipped | 0
> {lib/libfdt => scripts/dtc}/pylibfdt/setup.py | 0
> tools/.gitignore | 4 ---
> tools/Makefile | 30
> ----------------------
> tools/binman/binman.py | 2 +-
> 10 files changed, 41 insertions(+), 38 deletions(-)
> create mode 100644 scripts/dtc/pylibfdt/.gitignore
> create mode 100644 scripts/dtc/pylibfdt/Makefile
> rename lib/libfdt/pylibfdt/libfdt.i => scripts/dtc/pylibfdt/libfdt.i_shipped
> (100%)
> rename {lib/libfdt => scripts/dtc}/pylibfdt/setup.py (100%)
>
> diff --git a/Makefile b/Makefile
> index d074358..40cd61a 100644
> --- a/Makefile
> +++ b/Makefile
> @@ -1380,7 +1380,7 @@ $(timestamp_h): $(srctree)/Makefile FORCE
> $(call filechk,timestamp.h)
>
> checkbinman: tools
> - @if ! ( echo 'import libfdt' | ( PYTHONPATH=tools $(PYTHON) )); then \
> + @if ! ( echo 'import libfdt' | ( PYTHONPATH=scripts/dtc/pylibfdt
> $(PYTHON) )); then \
> echo >&2; \
> echo >&2 '*** binman needs the Python libfdt library.'; \
> echo >&2 '*** Either install it on your system, or try:'; \
> diff --git a/scripts/Makefile.spl b/scripts/Makefile.spl
> index 49b27ac..065bb25 100644
> --- a/scripts/Makefile.spl
> +++ b/scripts/Makefile.spl
> @@ -257,7 +257,7 @@ quiet_cmd_fdtgrep = FDTGREP $@
> $(obj)/$(SPL_BIN).dtb: dts/dt.dtb $(objtree)/tools/fdtgrep FORCE
> $(call if_changed,fdtgrep)
>
> -pythonpath = PYTHONPATH=tools
> +pythonpath = PYTHONPATH=scripts/dtc/pylibfdt
>
> quiet_cmd_dtocc = DTOC C $@
> cmd_dtocc = $(pythonpath) $(srctree)/tools/dtoc/dtoc -d
> $(obj)/$(SPL_BIN).dtb -o $@ platdata
> @@ -381,7 +381,7 @@ ifneq ($(cmd_files),)
> endif
>
> checkdtoc: tools
> - @if ! ( echo 'import libfdt' | ( PYTHONPATH=tools $(PYTHON) )); then \
> + @if ! ( echo 'import libfdt' | ( PYTHONPATH=scripts/dtc/pylibfdt
> $(PYTHON) )); then \
> echo '*** dtoc needs the Python libfdt library. Either '; \
> echo '*** install it on your system, or try:'; \
> echo '***'; \
> diff --git a/scripts/dtc/Makefile b/scripts/dtc/Makefile
> index 2a48022..f4a16ed 100644
> --- a/scripts/dtc/Makefile
> +++ b/scripts/dtc/Makefile
> @@ -29,3 +29,6 @@ $(obj)/dtc-lexer.lex.o: $(obj)/dtc-parser.tab.h
>
> # generated files need to be cleaned explicitly
> clean-files := dtc-lexer.lex.c dtc-parser.tab.c dtc-parser.tab.h
> +
> +# Added for U-Boot
> +subdir-y += pylibfdt
> diff --git a/scripts/dtc/pylibfdt/.gitignore b/scripts/dtc/pylibfdt/.gitignore
> new file mode 100644
> index 0000000..033f23d
> --- /dev/null
> +++ b/scripts/dtc/pylibfdt/.gitignore
> @@ -0,0 +1,4 @@
> +/_libfdt.so
> +/libfdt.py
> +/libfdt.pyc
> +/libfdt_wrap.c
> diff --git a/scripts/dtc/pylibfdt/Makefile b/scripts/dtc/pylibfdt/Makefile
> new file mode 100644
> index 0000000..01d5e0f
> --- /dev/null
> +++ b/scripts/dtc/pylibfdt/Makefile
> @@ -0,0 +1,30 @@
> +# Unfortunately setup.py below cannot handle srctree being ".." which it
> often
> +# is. It fails with an error like:
> +# Fatal error: can't create build/temp.linux-x86_64-2.7/../lib/libfdt/fdt.o:
> +# No such file or directory
> +# To fix this, use an absolute path.
> +LIBFDT_srcdir = $(abspath $(srctree)/$(src)/../libfdt)
> +
> +include $(LIBFDT_srcdir)/Makefile.libfdt
> +
> +# Unfortunately setup.py (or actually the Python distutil implementation)
> puts
> +# files into the same directory as the .i file. We cannot touch the source
> +# directory, so we "ship" .i file into the objtree.
> +PYLIBFDT_srcs = $(addprefix $(LIBFDT_srcdir)/,$(LIBFDT_SRCS)) \
> + $(obj)/libfdt.i
> +
> +quiet_cmd_pymod = PYMOD $@
> + cmd_pymod = unset CC; unset CROSS_COMPILE; unset CFLAGS;\
> + LDFLAGS="$(HOSTLDFLAGS)" \
> + VERSION="u-boot-$(UBOOTVERSION)" \
> + CPPFLAGS="$(HOSTCFLAGS) -I$(LIBFDT_srcdir)" OBJDIR=$(obj) \
> + SOURCES="$(PYLIBFDT_srcs)" \
> + SWIG_OPTS="-I$(LIBFDT_srcdir) -I$(LIBFDT_srcdir)/.." \
> + $(PYTHON) $< --quiet build_ext --inplace
> +
> +$(obj)/_libfdt.so: $(src)/setup.py $(PYLIBFDT_srcs) FORCE
> + $(call if_changed,pymod)
> +
> +always += _libfdt.so
> +
> +clean-files += libfdt.i _libfdt.so libfdt.py libfdt_wrap.c
> diff --git a/lib/libfdt/pylibfdt/libfdt.i
> b/scripts/dtc/pylibfdt/libfdt.i_shipped
> similarity index 100%
> rename from lib/libfdt/pylibfdt/libfdt.i
> rename to scripts/dtc/pylibfdt/libfdt.i_shipped
> diff --git a/lib/libfdt/pylibfdt/setup.py b/scripts/dtc/pylibfdt/setup.py
> similarity index 100%
> rename from lib/libfdt/pylibfdt/setup.py
> rename to scripts/dtc/pylibfdt/setup.py
> diff --git a/tools/.gitignore b/tools/.gitignore
> index 5293d44..6a487d2 100644
> --- a/tools/.gitignore
> +++ b/tools/.gitignore
> @@ -1,4 +1,3 @@
> -/_libfdt.so
> /atmel_pmecc_params
> /bin2header
> /bmp_logo
> @@ -17,9 +16,6 @@
> /img2srec
> /kwboot
> /lib/
> -/libfdt.py
> -/libfdt.pyc
> -/libfdt_wrap.c
> /mips-relocs
> /mkenvimage
> /mkexynosspl
> diff --git a/tools/Makefile b/tools/Makefile
> index 5db2a54..2b87e18 100644
> --- a/tools/Makefile
> +++ b/tools/Makefile
> @@ -63,15 +63,6 @@ LIBFDT_CSRCS := fdt.c fdt_ro.c fdt_wip.c fdt_sw.c fdt_rw.c
> fdt_strerror.c \
> fdt_empty_tree.c fdt_addresses.c fdt_overlay.c \
> fdt_region.c
>
> -# Unfortunately setup.py below cannot handle srctree being ".." which it
> often
> -# is. It fails with an error like:
> -# Fatal error: can't create build/temp.linux-x86_64-2.7/../lib/libfdt/fdt.o:
> -# No such file or directory
> -# To fix this, use an absolute path.
> -libfdt_tree := $(shell readlink -f $(srctree)/lib/libfdt)
> -
> -LIBFDT_SRCS := $(addprefix $(libfdt_tree)/, $(LIBFDT_CSRCS))
> -LIBFDT_SWIG := $(addprefix $(libfdt_tree)/, pylibfdt/libfdt.i)
> LIBFDT_OBJS := $(addprefix lib/libfdt/, $(patsubst %.c, %.o,
> $(LIBFDT_CSRCS)))
>
> RSA_OBJS-$(CONFIG_FIT_SIGNATURE) := $(addprefix lib/rsa/, \
> @@ -123,23 +114,6 @@ mkimage-objs := $(dumpimage-mkimage-objs) mkimage.o
> fit_info-objs := $(dumpimage-mkimage-objs) fit_info.o
> fit_check_sign-objs := $(dumpimage-mkimage-objs) fit_check_sign.o
>
> -# Unfortunately setup.py (or actually the Python distutil implementation)
> -# puts files into the same directory as the .i file. We cannot touch the
> source
> -# directory, so we copy the .i file into the tools/ build subdirectory before
> -# calling setup. This directory is safe to write to. This ensures that we get
> -# all three files in $(obj)/tools: _libfdt.so, libfdt.py and libfdt_wrap.c
> -# The latter is a temporary file which we could actually remove.
> -tools/_libfdt.so: $(LIBFDT_SRCS) $(LIBFDT_SWIG)
> - $(Q)cp $(LIBFDT_SWIG) tools/.
> - $(Q)unset CC; \
> - unset CROSS_COMPILE; \
> - LDFLAGS="$(HOSTLDFLAGS)" CFLAGS= VERSION="u-boot-$(UBOOTVERSION)" \
> - CPPFLAGS="$(_hostc_flags)" OBJDIR=tools \
> - SOURCES="$(LIBFDT_SRCS) tools/libfdt.i" \
> - SWIG_OPTS="-I$(srctree)/lib/libfdt -I$(srctree)/lib" \
> - $(PYTHON) $(libfdt_tree)/pylibfdt/setup.py --quiet build_ext \
> - --build-lib tools
> -
> ifneq ($(CONFIG_MX23)$(CONFIG_MX28),)
> # Add CONFIG_MXS into host CFLAGS, so we can check whether or not register
> # the mxsimage support within tools/mxsimage.c .
> @@ -231,10 +205,6 @@ clean-dirs := lib common
>
> always := $(hostprogs-y)
>
> -# Build a libfdt Python module if swig is available
> -# Use 'sudo apt-get install swig libpython-dev' to enable this
> -always += $(if $(shell which swig 2> /dev/null),_libfdt.so)
I'm working on updating Buildroot to remove the host dependency on
python as part of the tools build (Plus fix the mix of host system vs
host buildroot python/swig checks). Appreciate the recent changes as
it makes that easier, with the addition of the kconfig option to turn
on the libfdt build. I assume that removes the python/swig dependency
when that's disabled? Is the default in a un-configured uboot (ie
if I was just building tools) to leave libfdt off?
I'm irc if it's easier to discuss.
Matt
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