[Buildroot] [PATCH] package/pybind11: new package

Sat Feb 27 10:15:31 UTC 2021

See examples of failures that this new approach fixes:
http://autobuild.buildroot.net/results/44c98429a90e2799a92f71e0b70c6b0cc6145867/
http://autobuild.buildroot.net/results/3065c4a240eeed2b62f7c0ba364ed215379e0776/

Guillaume W. Bres
Software engineer
<guillaume.bressaix at gmail.com>

Le sam. 27 févr. 2021 à 11:10, <guillaume.bressaix at gmail.com> a écrit :

> From: "Guillaume W. Bres" <guillaume.bressaix at gmail.com>
>
> Pybind11 is a lightweight header-only library that exposes C++
> types in Python and vice versa, mainly to create Python
> bindings of existing C++ code.
>
> Signed-off-by: Guillaume W. Bres <guillaume.bressaix at gmail.com>
> ---
>
> Warning!!: this new package and its internal
> BR2_PACKAGE_PYBIND11_WITH_PYTHON option
> intends to replace package/python-pybind which is totally broken
> since upgrade to v2.6.1 in ->next.
>
> The python build now requires a previous cmake build:
>         + python-pybind only is not possible and will not build
>         by itself
>
>         + python setup.py requires cmake to install
>         within $(@D) a couple files (in $(@D)/pybind11 exactly)
>         to properly work. See my message in BR digest 17/02:
>         <CAJe0E3eQxAZHAe2DN4Qp9k_0czYGsR639+=
> bSUaEdyaKm0Keuw at mail.gmail.com>
>         cc to Thomas, Gwen & Peter, entitled:
>         "Python-pybind we need to discuss this package"
>
>         => If this package is merged, package/python-pybind is deprecated
>
>         => package/python-pybind v2.6.1+ in ->next must be removed,
>         python-build by itself cannot work anymore
>
> Pybind11 is a host only package
>
> Signed-off-by: Guillaume W. Bres <guillaume.bressaix at gmail.com>
> ---
>  DEVELOPERS                     |  1 +
>  package/pybind11/Config.in     | 25 ++++++++++++++++++++
>  package/pybind11/pybind11.hash |  3 +++
>  package/pybind11/pybind11.mk   | 42 ++++++++++++++++++++++++++++++++++
>  4 files changed, 71 insertions(+)
>  create mode 100644 package/pybind11/Config.in
>  create mode 100644 package/pybind11/pybind11.hash
>  create mode 100644 package/pybind11/pybind11.mk
>
> diff --git a/DEVELOPERS b/DEVELOPERS
> index b019fe04d5..98e8b329ed 100644
> --- a/DEVELOPERS
> +++ b/DEVELOPERS
> @@ -1057,6 +1057,7 @@ N:        Guillaume William Brs <
> guillaume.bressaix at gmail.com>
>  F:     package/libnids/
>  F:     package/liquid-dsp/
>  F:     package/pixiewps/
> +F:     package/pybind11/
>  F:     package/python-pybind/
>  F:     package/reaver/
>
> diff --git a/package/pybind11/Config.in b/package/pybind11/Config.in
> new file mode 100644
> index 0000000000..883bf8cc09
> --- /dev/null
> +++ b/package/pybind11/Config.in
> @@ -0,0 +1,25 @@
> +comment "pybind11 needs a toolchain w/ C++, wchar"
> +       depends on !BR2_INSTALL_LIBSTDCPP || !BR2_USE_WCHAR
> +
> +config BR2_PACKAGE_PYBIND11
> +       bool "pybind11"
> +       depends on BR2_INSTALL_LIBSTDCPP # boost
> +       depends on BR2_USE_WCHAR # boost
> +       depends on !BR2_TOOLCHAIN_HAS_GCC_BUG_64735 # boost-thread
> +       select BR2_PACKAGE_BOOST
> +       help
> +         Pybind11 is a lightweight header-only library that exposes C++
> +         types in Python and vice versa, mainly to create Python
> +         bindings of existing C++ code.
> +
> +         http://pybind11.readthedocs.org/en/master
> +
> +if BR2_PACKAGE_PYBIND11
> +
> +config BR2_PACKAGE_PYBIND11_WITH_PYTHON
> +       bool "pybind11-python"
> +       depends on BR2_PACKAGE_PYTHON3
> +       help
> +         Activate support for python-pybind
> +
> +endif
> diff --git a/package/pybind11/pybind11.hash
> b/package/pybind11/pybind11.hash
> new file mode 100644
> index 0000000000..e703519a22
> --- /dev/null
> +++ b/package/pybind11/pybind11.hash
> @@ -0,0 +1,3 @@
> +# Locally calculated
> +sha256 8ff2fff22df038f5cd02cea8af56622bc67f5b64534f1b83b9f133b8366acff2
> pybind11-2.6.2.tar.gz
> +sha256 83965b843b98f670d3a85bd041ed4b372c8ec50d7b4a5995a83ac697ba675dcb
> LICENSE
> diff --git a/package/pybind11/pybind11.mk b/package/pybind11/pybind11.mk
> new file mode 100644
> index 0000000000..c8d69e1dd4
> --- /dev/null
> +++ b/package/pybind11/pybind11.mk
> @@ -0,0 +1,42 @@
>
> +################################################################################
> +#
> +# pybind11
> +#
>
> +################################################################################
> +
> +PYBIND11_VERSION = 2.6.2
> +PYBIND11_SITE = $(call github,pybind,pybind11,v$(PYBIND11_VERSION))
> +PYBIND11_LICENSE = BSD-3-Clause
> +PYBIND11_LICENSE_FILES = LICENSE
> +PYBIND11_INSTALL_STAGING = YES
> +PYBIND11_SUPPORTS_IN_SOURCE_BUILD = YES
> +
> +HOST_PYBIND11_CONF_OPTS = \
> +       -DBUILD_DOCS=OFF \
> +       -DDOWNLOAD_EIGEN=OFF \
> +       -DPYTHON=$(TARGET_DIR)/usr/bin/python \
> +       -DPYTHON_PREFIX=$(STAGING_DIR)/usr
> +
> +# pybind11-python support activation
> +# this requires the cmake build installed within $(@D)
> +ifeq ($(BR2_PACKAGE_PYBIND11_WITH_PYTHON),y)
> +
> +HOST_PYBIND11_DEPENDENCIES += host-python3
> +
> +HOST_PYBIND11_CONF_OPTS += -DCMAKE_INSTALL_PREFIX=$(@D)/pybind11
> +
> +define PYBIND11_PYTHON_BUILD
> +       cd $(@D) && $(HOST_DIR)/bin/python setup.py install
> +endef
> +
> +HOST_PYBIND11_POST_INSTALL_HOOKS += PYBIND11_PYTHON_BUILD
> +
> +else
> +
> +HOST_PYBIND11_CONF_OPTS += \
> +       -DPYBIND_FINDPYTHON=OFF \
> +       -DPYBIND11_NOPYTHON=ON
> +
> +endif
> +
> +$(eval $(host-cmake-package))
> --
> 2.20.1
>
>
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