[Buildroot] [PATCH v2 1/1] qemu: add support for python3

[Baruch Siach <baruch@tkos.co.il>]

Hi Adam,

Adam Duskett writes:
> qemu 2.12.0 now supports building against python3.
> see: https://wiki.qemu.org/ChangeLog/2.12#Build_Dependencies
>
> Signed-off-by: Adam Duskett <aduskett@gmail.com>
> ---
> Changes v1 -> v2:
>   - Split the python version check into two seperate checks for
>     readability, one for the target, one for the host.
>   - Fix location of the python version check for target and host.
>
>  package/qemu/qemu.mk | 27 ++++++++++++++++++++++-----
>  1 file changed, 22 insertions(+), 5 deletions(-)
>
> diff --git a/package/qemu/qemu.mk b/package/qemu/qemu.mk
> index afb2aa92f6..6dd9ce4a62 100644
> --- a/package/qemu/qemu.mk
> +++ b/package/qemu/qemu.mk
> @@ -16,7 +16,7 @@ QEMU_LICENSE_FILES = COPYING COPYING.LIB
>  #-------------------------------------------------------------
>  # Target-qemu
>  
> -QEMU_DEPENDENCIES = host-pkgconf host-python libglib2 zlib pixman
> +QEMU_DEPENDENCIES = host-pkgconf libglib2 zlib pixman
>  
>  # Need the LIBS variable because librt and libm are
>  # not automatically pulled. :-(
> @@ -25,9 +25,19 @@ QEMU_LIBS = -lrt -lm
>  QEMU_OPTS =
>  
>  QEMU_VARS = \
> -	LIBTOOL=$(HOST_DIR)/bin/libtool \
> -	PYTHON=$(HOST_DIR)/bin/python2 \
> +	LIBTOOL=$(HOST_DIR)/bin/libtool
> +
> +ifeq ($(BR2_PACKAGE_PYTHON3),y)
> +QEMU_DEPENDENCIES += host-python3
> +QEMU_VARS += \
> +	PYTHON=$(HOST_DIR)/bin/python3 \
> +	PYTHONPATH=$(TARGET_DIR)/usr/lib/python$(PYTHON3_VERSION_MAJOR)/site-packages
> +else
> +QEMU_DEPENDENCIES += host-python
> +QEMU_VARS += \
> +	PYTHON=$(HOST_DIR)/bin/python \
>  	PYTHONPATH=$(TARGET_DIR)/usr/lib/python$(PYTHON_VERSION_MAJOR)/site-packages
> +endif

Can't we use the host installed python? Python is already a dependency
of Buildroot.

baruch

>  # If we want to specify only a subset of targets, we must still enable all
>  # of them, so that QEMU properly builds its list of default targets, from
> @@ -150,7 +160,7 @@ $(eval $(generic-package))
>  #-------------------------------------------------------------
>  # Host-qemu
>  
> -HOST_QEMU_DEPENDENCIES = host-pkgconf host-python host-zlib host-libglib2 host-pixman
> +HOST_QEMU_DEPENDENCIES = host-pkgconf host-zlib host-libglib2 host-pixman
>  
>  #       BR ARCH         qemu
>  #       -------         ----
> @@ -263,12 +273,19 @@ define HOST_QEMU_CONFIGURE_CMDS
>  		--interp-prefix=$(STAGING_DIR) \
>  		--cc="$(HOSTCC)" \
>  		--host-cc="$(HOSTCC)" \
> -		--python=$(HOST_DIR)/bin/python2 \
>  		--extra-cflags="$(HOST_CFLAGS)" \
>  		--extra-ldflags="$(HOST_LDFLAGS)" \
>  		$(HOST_QEMU_OPTS)
>  endef
>  
> +ifeq ($(BR2_PACKAGE_PYTHON3),y)
> +HOST_QEMU_DEPENDENCIES += host-python3
> +HOST_QEMU_CONFIGURE_CMDS += --python=$(HOST_DIR)/bin/python3
> +else
> +HOST_QEMU_DEPENDENCIES += host-python
> +HOST_QEMU_CONFIGURE_CMDS += --python=$(HOST_DIR)/bin/python2
> +endif
> +
>  define HOST_QEMU_BUILD_CMDS
>  	$(HOST_MAKE_ENV) $(MAKE) -C $(@D)
>  endef

-- 
     http://baruch.siach.name/blog/                  ~. .~   Tk Open Systems
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   - baruch at tkos.co.il - tel: +972.52.368.4656, http://www.tkos.co.il -