[Buildroot] [PATCH 0/2] package: add libyang-cpp and sysrepo-cpp

[Buildroot] [PATCH 0/2] package: add libyang-cpp and sysrepo-cpp

[Vincent Jardin via buildroot]

Hi,

this small series adds C++ bindings for the YANG stack used by sysrepo:
 - package/libyang-cpp: C++ RAII bindings for libyang v4
 - package/sysrepo-cpp: C++ RAII bindings for the sysrepo datastore

Both packages are used together in our projects, hence sent as a single
series.

Runtime has been validated with the following test configuration:
    BR2_PACKAGE_SYSREPO_CPP=y

Both are sent with the same serie since since sysrepo shall be used with
libyang.

The series has been built and run-tested in GitLab CI:
  - https://gitlab.com/vjardin/buildroot/-/pipelines/2195059828
    >> it is the state before those contributions. It shows a problem
       with the bootlin toolchain 

  - https://gitlab.com/vjardin/buildroot/-/pipelines/2194922330
    >> ok for sysrepo-cpp and libyang-cpp ; same failure with bootlin
       toolchain.

Vincent Jardin (2):
  libyang-cpp: new package
  package/sysrepo-cpp: new package

 DEVELOPERS                           |  2 ++
 package/Config.in                    |  2 ++
 package/libyang-cpp/Config.in        | 15 +++++++++++++++
 package/libyang-cpp/libyang-cpp.hash |  3 +++
 package/libyang-cpp/libyang-cpp.mk   | 22 ++++++++++++++++++++++
 package/sysrepo-cpp/Config.in        | 20 ++++++++++++++++++++
 package/sysrepo-cpp/sysrepo-cpp.hash |  3 +++
 package/sysrepo-cpp/sysrepo-cpp.mk   | 26 ++++++++++++++++++++++++++
 8 files changed, 93 insertions(+)
 create mode 100644 package/libyang-cpp/Config.in
 create mode 100644 package/libyang-cpp/libyang-cpp.hash
 create mode 100644 package/libyang-cpp/libyang-cpp.mk
 create mode 100644 package/sysrepo-cpp/Config.in
 create mode 100644 package/sysrepo-cpp/sysrepo-cpp.hash
 create mode 100644 package/sysrepo-cpp/sysrepo-cpp.mk

-- 
2.34.1

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[Buildroot] [PATCH 1/2] libyang-cpp: new package

[Vincent Jardin via buildroot]

Add C++ RAII bindings for libyang (v4).

Signed-off-by: Vincent Jardin <vjardin@free.fr>
---
 DEVELOPERS                           |  1 +
 package/Config.in                    |  1 +
 package/libyang-cpp/Config.in        | 15 +++++++++++++++
 package/libyang-cpp/libyang-cpp.hash |  3 +++
 package/libyang-cpp/libyang-cpp.mk   | 22 ++++++++++++++++++++++
 5 files changed, 42 insertions(+)
 create mode 100644 package/libyang-cpp/Config.in
 create mode 100644 package/libyang-cpp/libyang-cpp.hash
 create mode 100644 package/libyang-cpp/libyang-cpp.mk

diff --git a/DEVELOPERS b/DEVELOPERS
index 5e1fa6401f..4b5d0839bf 100644
--- a/DEVELOPERS
+++ b/DEVELOPERS
@@ -3345,6 +3345,7 @@ F:	configs/nvidia_bf3_defconfig
 F:	package/bfscripts/
 F:	package/dpdk/
 F:	package/libecoli/
+F:	package/libyang-cpp/
 
 N:	Vincent Prince <vincent.prince.fr@gmail.com>
 F:	package/nss-myhostname/
diff --git a/package/Config.in b/package/Config.in
index 83414b3e0b..b5892fe28b 100644
--- a/package/Config.in
+++ b/package/Config.in
@@ -2103,6 +2103,7 @@ menu "Networking"
 	source "package/libvncserver/Config.in"
 	source "package/libwebsockets/Config.in"
 	source "package/libyang/Config.in"
+	source "package/libyang-cpp/Config.in"
 	source "package/libzenoh-c/Config.in"
 	source "package/libzenoh-pico/Config.in"
 	source "package/lksctp-tools/Config.in"
diff --git a/package/libyang-cpp/Config.in b/package/libyang-cpp/Config.in
new file mode 100644
index 0000000000..5bb79ffb2e
--- /dev/null
+++ b/package/libyang-cpp/Config.in
@@ -0,0 +1,15 @@
+config BR2_PACKAGE_LIBYANG_CPP
+	bool "libyang-cpp"
+	depends on BR2_INSTALL_LIBSTDCPP
+	depends on BR2_TOOLCHAIN_GCC_AT_LEAST_10
+	select BR2_PACKAGE_LIBYANG
+	help
+	  C++ bindings for the libyang library (v4).
+
+	  libyang-cpp implements modern C++ RAII wrappers around the libyang
+	  C API, used by sysrepo, Kea + NETCONF, etc.
+
+	  https://github.com/CESNET/libyang-cpp
+
+comment "libyang-cpp needs a toolchain w/ C++, gcc >= 10"
+	depends on !BR2_INSTALL_LIBSTDCPP || !BR2_TOOLCHAIN_GCC_AT_LEAST_10
diff --git a/package/libyang-cpp/libyang-cpp.hash b/package/libyang-cpp/libyang-cpp.hash
new file mode 100644
index 0000000000..cf4dc8085d
--- /dev/null
+++ b/package/libyang-cpp/libyang-cpp.hash
@@ -0,0 +1,3 @@
+# Locally calculated
+sha256  70fd0df940026fb930d5407abe679e064caf4701bff35d79465b9ad2c0915808  libyang-cpp-4.tar.gz
+sha256  82e3758011ec44c78e98d0777799d6e12aec5b8a64b32ebb20d0fe50e32488bb  LICENSE
diff --git a/package/libyang-cpp/libyang-cpp.mk b/package/libyang-cpp/libyang-cpp.mk
new file mode 100644
index 0000000000..1fb109b03d
--- /dev/null
+++ b/package/libyang-cpp/libyang-cpp.mk
@@ -0,0 +1,22 @@
+################################################################################
+#
+# libyang-cpp
+#
+################################################################################
+
+LIBYANG_CPP_VERSION = 4
+LIBYANG_CPP_SITE = $(call github,CESNET,libyang-cpp,v$(LIBYANG_CPP_VERSION))
+LIBYANG_CPP_LICENSE = BSD-3-Clause
+LIBYANG_CPP_LICENSE_FILES = LICENSE
+
+LIBYANG_CPP_INSTALL_STAGING = YES
+
+LIBYANG_CPP_SUPPORTS_IN_SOURCE_BUILD = NO
+
+LIBYANG_CPP_DEPENDENCIES = libyang
+
+LIBYANG_CPP_CONF_OPTS = \
+	-DBUILD_TESTING=OFF \
+	-DWITH_DOCS=OFF
+
+$(eval $(cmake-package))
-- 
2.34.1

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Re: [Buildroot] [PATCH 1/2] libyang-cpp: new package

[Thomas Petazzoni via buildroot]

Hello Vincent,

I have applied your patch, after doing a small number of tweaks, see
below.

On Fri,  5 Dec 2025 11:06:25 +0100
Vincent Jardin via buildroot <buildroot@buildroot.org> wrote:

> diff --git a/package/libyang-cpp/Config.in b/package/libyang-cpp/Config.in
> new file mode 100644
> index 0000000000..5bb79ffb2e
> --- /dev/null
> +++ b/package/libyang-cpp/Config.in
> @@ -0,0 +1,15 @@
> +config BR2_PACKAGE_LIBYANG_CPP
> +	bool "libyang-cpp"
> +	depends on BR2_INSTALL_LIBSTDCPP
> +	depends on BR2_TOOLCHAIN_GCC_AT_LEAST_10
> +	select BR2_PACKAGE_LIBYANG

You forgot to replicate the "depends on" of BR2_PACKAGE_LIBYANG, so I
fixed this to:

        bool "libyang-cpp"
        depends on BR2_INSTALL_LIBSTDCPP
        depends on BR2_TOOLCHAIN_GCC_AT_LEAST_10
        depends on BR2_TOOLCHAIN_HAS_SYNC_4 # libyang
        depends on BR2_TOOLCHAIN_HAS_THREADS # libyang
        depends on !BR2_STATIC_LIBS # libyang
        select BR2_PACKAGE_LIBYANG

> +	help
> +	  C++ bindings for the libyang library (v4).
> +
> +	  libyang-cpp implements modern C++ RAII wrappers around the libyang

This line was too long, spotted by "make check-package".

> +	  C API, used by sysrepo, Kea + NETCONF, etc.
> +
> +	  https://github.com/CESNET/libyang-cpp
> +
> +comment "libyang-cpp needs a toolchain w/ C++, gcc >= 10"
> +	depends on !BR2_INSTALL_LIBSTDCPP || !BR2_TOOLCHAIN_GCC_AT_LEAST_10

Had to update this according to the new dependencies.

> diff --git a/package/libyang-cpp/libyang-cpp.mk b/package/libyang-cpp/libyang-cpp.mk
> new file mode 100644
> index 0000000000..1fb109b03d
> --- /dev/null
> +++ b/package/libyang-cpp/libyang-cpp.mk
> @@ -0,0 +1,22 @@
> +################################################################################
> +#
> +# libyang-cpp
> +#
> +################################################################################
> +
> +LIBYANG_CPP_VERSION = 4
> +LIBYANG_CPP_SITE = $(call github,CESNET,libyang-cpp,v$(LIBYANG_CPP_VERSION))
> +LIBYANG_CPP_LICENSE = BSD-3-Clause
> +LIBYANG_CPP_LICENSE_FILES = LICENSE
> +
> +LIBYANG_CPP_INSTALL_STAGING = YES
> +
> +LIBYANG_CPP_SUPPORTS_IN_SOURCE_BUILD = NO
> +
> +LIBYANG_CPP_DEPENDENCIES = libyang

A bit too many empty lines here (really just a matter of taste).

> +LIBYANG_CPP_CONF_OPTS = \
> +	-DBUILD_TESTING=OFF \

-DBUILD_TESTING=OFF is not needed, it's already passed by default by
cmake-package.

Applied with those changes, thanks!

Thomas
-- 
Thomas Petazzoni, co-owner and CEO, Bootlin
Embedded Linux and Kernel engineering and training
https://bootlin.com
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[Buildroot] [PATCH 2/2] package/sysrepo-cpp: new package

[Vincent Jardin via buildroot]

Add a Buildroot package for sysrepo-cpp, providing modern C++ RAII
bindings for the sysrepo YANG datastore library.

Signed-off-by: Vincent Jardin <vjardin@free.fr>
---
 DEVELOPERS                           |  1 +
 package/Config.in                    |  1 +
 package/sysrepo-cpp/Config.in        | 20 ++++++++++++++++++++
 package/sysrepo-cpp/sysrepo-cpp.hash |  3 +++
 package/sysrepo-cpp/sysrepo-cpp.mk   | 26 ++++++++++++++++++++++++++
 5 files changed, 51 insertions(+)
 create mode 100644 package/sysrepo-cpp/Config.in
 create mode 100644 package/sysrepo-cpp/sysrepo-cpp.hash
 create mode 100644 package/sysrepo-cpp/sysrepo-cpp.mk

diff --git a/DEVELOPERS b/DEVELOPERS
index 4b5d0839bf..ef3fc769f7 100644
--- a/DEVELOPERS
+++ b/DEVELOPERS
@@ -3346,6 +3346,7 @@ F:	package/bfscripts/
 F:	package/dpdk/
 F:	package/libecoli/
 F:	package/libyang-cpp/
+F:	package/sysrepo-cpp/
 
 N:	Vincent Prince <vincent.prince.fr@gmail.com>
 F:	package/nss-myhostname/
diff --git a/package/Config.in b/package/Config.in
index b5892fe28b..7091249b4b 100644
--- a/package/Config.in
+++ b/package/Config.in
@@ -2142,6 +2142,7 @@ menu "Networking"
 	source "package/sofia-sip/Config.in"
 	source "package/sscep/Config.in"
 	source "package/sysrepo/Config.in"
+	source "package/sysrepo-cpp/Config.in"
 	source "package/thrift/Config.in"
 	source "package/usbredir/Config.in"
 	source "package/wampcc/Config.in"
diff --git a/package/sysrepo-cpp/Config.in b/package/sysrepo-cpp/Config.in
new file mode 100644
index 0000000000..5cdfefa025
--- /dev/null
+++ b/package/sysrepo-cpp/Config.in
@@ -0,0 +1,20 @@
+config BR2_PACKAGE_SYSREPO_CPP
+	bool "sysrepo-cpp"
+	depends on BR2_TOOLCHAIN_HAS_THREADS
+	depends on BR2_INSTALL_LIBSTDCPP
+	depends on BR2_TOOLCHAIN_GCC_AT_LEAST_10
+	depends on !BR2_STATIC_LIBS
+	depends on !BR2_TOOLCHAIN_USES_UCLIBC
+	select BR2_PACKAGE_SYSREPO
+	select BR2_PACKAGE_LIBYANG_CPP
+	help
+	  C++20 RAII bindings for the sysrepo YANG datastore library.
+
+	  This library provides modern C++ object-oriented bindings on top
+	  of sysrepo, using RAII for automatic lifetime management.
+
+	  https://github.com/sysrepo/sysrepo-cpp
+
+comment "sysrepo-cpp needs a toolchain w/ C++, threads, dynamic libs, gcc >= 10"
+	depends on !BR2_TOOLCHAIN_HAS_THREADS || !BR2_INSTALL_LIBSTDCPP || \
+		   BR2_STATIC_LIBS || !BR2_TOOLCHAIN_GCC_AT_LEAST_10
diff --git a/package/sysrepo-cpp/sysrepo-cpp.hash b/package/sysrepo-cpp/sysrepo-cpp.hash
new file mode 100644
index 0000000000..43a1bc439f
--- /dev/null
+++ b/package/sysrepo-cpp/sysrepo-cpp.hash
@@ -0,0 +1,3 @@
+# Locally calculated
+sha256  d7fbeaba7f2fdaf70c67cc70f438943eee636b21f08854e58967d0d97801bacc  sysrepo-cpp-6.tar.gz
+sha256  82e3758011ec44c78e98d0777799d6e12aec5b8a64b32ebb20d0fe50e32488bb  LICENSE
diff --git a/package/sysrepo-cpp/sysrepo-cpp.mk b/package/sysrepo-cpp/sysrepo-cpp.mk
new file mode 100644
index 0000000000..bbe81289b1
--- /dev/null
+++ b/package/sysrepo-cpp/sysrepo-cpp.mk
@@ -0,0 +1,26 @@
+################################################################################
+#
+# sysrepo-cpp
+#
+################################################################################
+
+SYSREPO_CPP_VERSION = 6
+SYSREPO_CPP_SITE    = $(call github,sysrepo,sysrepo-cpp,v$(SYSREPO_CPP_VERSION))
+
+SYSREPO_CPP_LICENSE = BSD-3-Clause
+SYSREPO_CPP_LICENSE_FILES = LICENSE
+
+SYSREPO_CPP_INSTALL_STAGING = YES
+SYSREPO_CPP_INSTALL_TARGET  = YES
+
+SYSREPO_CPP_CONF_OPTS += \
+	-DCMAKE_BUILD_TYPE=Release \
+	-DBUILD_TESTING=OFF \
+	-DWITH_DOCS=OFF \
+	-DWITH_EXAMPLES=OFF
+
+SYSREPO_CPP_SUPPORTS_IN_SOURCE_BUILD = NO
+
+SYSREPO_CPP_DEPENDENCIES = sysrepo libyang-cpp
+
+$(eval $(cmake-package))
-- 
2.34.1

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Re: [Buildroot] [PATCH 2/2] package/sysrepo-cpp: new package

[Thomas Petazzoni via buildroot]

Hello Vincent,

Thanks for the patch, which I have applied with a few tweaks, see below.

On Fri,  5 Dec 2025 11:06:26 +0100
Vincent Jardin via buildroot <buildroot@buildroot.org> wrote:


> diff --git a/package/sysrepo-cpp/Config.in b/package/sysrepo-cpp/Config.in
> new file mode 100644
> index 0000000000..5cdfefa025
> --- /dev/null
> +++ b/package/sysrepo-cpp/Config.in
> @@ -0,0 +1,20 @@
> +config BR2_PACKAGE_SYSREPO_CPP
> +	bool "sysrepo-cpp"
> +	depends on BR2_TOOLCHAIN_HAS_THREADS
> +	depends on BR2_INSTALL_LIBSTDCPP
> +	depends on BR2_TOOLCHAIN_GCC_AT_LEAST_10
> +	depends on !BR2_STATIC_LIBS
> +	depends on !BR2_TOOLCHAIN_USES_UCLIBC

I had to update this to properly propagate all the dependencies:

        depends on BR2_USE_MMU # sysrepo
        depends on BR2_TOOLCHAIN_HAS_THREADS_NPTL # sysrepo
        depends on !BR2_STATIC_LIBS # sysrepo, libyang-cpp
        depends on BR2_INSTALL_LIBSTDCPP # sysrepo, libyang-cpp
        depends on BR2_TOOLCHAIN_GCC_AT_LEAST_10 # libyang-cpp
        depends on BR2_TOOLCHAIN_HAS_SYNC_4 # libyang-cpp
        # std::timespec build issue
        depends on !BR2_TOOLCHAIN_USES_UCLIBC

> +	select BR2_PACKAGE_SYSREPO
> +	select BR2_PACKAGE_LIBYANG_CPP
> +	help
> +	  C++20 RAII bindings for the sysrepo YANG datastore library.
> +
> +	  This library provides modern C++ object-oriented bindings on top

Line was too long.

> +	  of sysrepo, using RAII for automatic lifetime management.
> +
> +	  https://github.com/sysrepo/sysrepo-cpp
> +
> +comment "sysrepo-cpp needs a toolchain w/ C++, threads, dynamic libs, gcc >= 10"
> +	depends on !BR2_TOOLCHAIN_HAS_THREADS || !BR2_INSTALL_LIBSTDCPP || \
> +		   BR2_STATIC_LIBS || !BR2_TOOLCHAIN_GCC_AT_LEAST_10

Updated this based on the dependencies.


> diff --git a/package/sysrepo-cpp/sysrepo-cpp.mk b/package/sysrepo-cpp/sysrepo-cpp.mk
> new file mode 100644
> index 0000000000..bbe81289b1
> --- /dev/null
> +++ b/package/sysrepo-cpp/sysrepo-cpp.mk
> @@ -0,0 +1,26 @@
> +################################################################################
> +#
> +# sysrepo-cpp
> +#
> +################################################################################
> +
> +SYSREPO_CPP_VERSION = 6
> +SYSREPO_CPP_SITE    = $(call github,sysrepo,sysrepo-cpp,v$(SYSREPO_CPP_VERSION))

We don't align spaces.

> +

Excessive empty line.

> +SYSREPO_CPP_LICENSE = BSD-3-Clause
> +SYSREPO_CPP_LICENSE_FILES = LICENSE
> +
> +SYSREPO_CPP_INSTALL_STAGING = YES
> +SYSREPO_CPP_INSTALL_TARGET  = YES

This last line is not needed, that's the default.

> +
> +SYSREPO_CPP_CONF_OPTS += \
> +	-DCMAKE_BUILD_TYPE=Release \

Not needed, CMAKE_BUILD_TYPE is handled by the cmake-package infra.

> +	-DBUILD_TESTING=OFF \

Same.

> +	-DWITH_DOCS=OFF \
> +	-DWITH_EXAMPLES=OFF
> +
> +SYSREPO_CPP_SUPPORTS_IN_SOURCE_BUILD = NO
> +
> +SYSREPO_CPP_DEPENDENCIES = sysrepo libyang-cpp
> +
> +$(eval $(cmake-package))

Applied with those tweaks. Thanks a lot!

Thomas
-- 
Thomas Petazzoni, co-owner and CEO, Bootlin
Embedded Linux and Kernel engineering and training
https://bootlin.com
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