[oe] [meta-oe][PATCH] protobuf: make python-protobuf dependency optional and default to off

[akuster808]

On 09/25/2018 06:53 PM, Paul Eggleton wrote:
> A dependency on python-protobuf was added in commit
> 5f6fcfd36272768a3ff9078c07c572cf5dc01ccd for the sole purpose of
> providing a ptest, however python-protobuf is in meta-python and thus
> this means that meta-oe would depend on meta-python by default (assuming
> your distro enables ptest by default), and we don't want that - meta-oe
> isn't supposed to depend upon any layer other than openembedded-core.
> Luckily we can still have a ptest even without the python support, so
> add a PACKAGECONFIG and leave it disabled by default.
>
> Note: the PACKAGECONFIG here is not particularly useful since it's only
> about what goes into the -ptest package and thus also the dependency. I
> contemplated just using LANG_SUPPORT instead, but PACKAGECONFIG does
> have the advantage that it's introspectable and fairly well understood
> so in the end I went with it.
thanks. with backport to sumo ?

>
> Signed-off-by: Paul Eggleton <paul.eggleton at linux.intel.com>
> ---
>  meta-oe/recipes-devtools/protobuf/protobuf_3.6.1.bb | 7 +++++--
>  1 file changed, 5 insertions(+), 2 deletions(-)
>
> diff --git a/meta-oe/recipes-devtools/protobuf/protobuf_3.6.1.bb b/meta-oe/recipes-devtools/protobuf/protobuf_3.6.1.bb
> index f8498c4c8..cf72d9ca7 100644
> --- a/meta-oe/recipes-devtools/protobuf/protobuf_3.6.1.bb
> +++ b/meta-oe/recipes-devtools/protobuf/protobuf_3.6.1.bb
> @@ -22,10 +22,13 @@ S = "${WORKDIR}/git"
>  
>  inherit autotools-brokensep pkgconfig ptest
>  
> +PACKAGECONFIG ??= ""
> +PACKAGECONFIG[python] = ",,"
> +
>  EXTRA_OECONF += "--with-protoc=echo"
>  
>  TEST_SRC_DIR = "examples"
> -LANG_SUPPORT = "cpp python"
> +LANG_SUPPORT = "cpp ${@bb.utils.contains('PACKAGECONFIG', 'python', 'python', '', d)}"
>  
>  do_compile_ptest() {
>  	# Modify makefile to use the cross-compiler
> @@ -78,7 +81,7 @@ FILES_${PN}-lite = "${libdir}/libprotobuf-lite${SOLIBS}"
>  
>  RDEPENDS_${PN}-compiler = "${PN}"
>  RDEPENDS_${PN}-dev += "${PN}-compiler"
> -RDEPENDS_${PN}-ptest = "bash python-protobuf"
> +RDEPENDS_${PN}-ptest = "bash ${@bb.utils.contains('PACKAGECONFIG', 'python', 'python-protobuf', '', d)}"
>  
>  MIPS_INSTRUCTION_SET = "mips"
>