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package/pkg-cargo: allow packages to define download environment

PATCH Superseded [email protected] 3 participants 17 messages Feb 9, 2022 – Feb 10, 2022 2 messages not in the archive

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#1 lore raw

PATCH v2 1/5 package/pkg-cargo: allow packages to define download environment

From: "Yann E. MORIN" <[email protected]>

Currently, the cargo infrastructure forcibly sets the package _DL_ENV variable, instead of appending to it, which prevents packages from providing their own download environment variables.

We fix that by using an append-assignment.

Note: when introduced, that variable was explicitly not documented, and is supposed to only be used by packages infrastructures. However, that variable exists, and it can be (ab)used by br2-external packages (most probably to ill effects, but heh!). We anyway leave it undocumented, like _ROOTFS_PRE_CMD_HOOKS.

Cc Thomas Petazzoni <[email protected]>
---
 package/pkg-cargo.mk | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
package/pkg-cargo.mk +1 -1
index e74a8358bc..66bea513e0 100644
@@ -69,7 +69,7 @@ define inner-cargo-package
 $(2)_DOWNLOAD_DEPENDENCIES += host-rustc
 
 $(2)_DOWNLOAD_POST_PROCESS = cargo
-$(2)_DL_ENV = CARGO_HOME=$$(HOST_DIR)/share/cargo
+$(2)_DL_ENV += CARGO_HOME=$$(HOST_DIR)/share/cargo
 
 # Due to vendoring, it is pretty likely that not all licenses are
 # listed in <pkg>_LICENSE.
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Acked-by Thomas Petazzoni on v2 1/5
#2 lore raw
Quoted 8 lines · On Wed, 9 Feb 2022 17:08:43 +0100 <[email protected]> wrote:

From: "Yann E. MORIN" <[email protected]>

Currently, the cargo infrastructure forcibly sets the package _DL_ENV variable, instead of appending to it, which prevents packages from providing their own download environment variables.

We fix that by using an append-assignment.

Quoted 8 lines

Note: when introduced, that variable was explicitly not documented, and is supposed to only be used by packages infrastructures. However, that variable exists, and it can be (ab)used by br2-external packages (most probably to ill effects, but heh!). We anyway leave it undocumented, like _ROOTFS_PRE_CMD_HOOKS.

Cc Thomas Petazzoni <[email protected]>
Signature · 7 lines
Thomas Petazzoni, co-owner and CEO, Bootlin
Embedded Linux and Kernel engineering and training
https://bootlin.com
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#3 lore raw
In reply to [email protected]
Quoted 3 lines · On Wed, 9 Feb 2022 17:08:43 +0100 <[email protected]> wrote:

$(2)_DOWNLOAD_POST_PROCESS = cargo
-$(2)_DL_ENV = CARGO_HOME=$$(HOST_DIR)/share/cargo +$(2)_DL_ENV += CARGO_HOME=$$(HOST_DIR)/share/cargo

But, but, then, how is:

PYTHON_CRYPTOGRAPHY_DL_ENV = \
BR_CARGO_MANIFEST_PATH=src/rust/Cargo.toml

currently working?

Thomas

Signature · 7 lines
Thomas Petazzoni, co-owner and CEO, Bootlin
Embedded Linux and Kernel engineering and training
https://bootlin.com
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#4 lore raw

Thomas, All,

On 2022-02-09 20:52 +0100, Thomas Petazzoni via buildroot spake thusly:

Quoted 6 lines
Quoted 3 lines · On Wed, 9 Feb 2022 17:08:43 +0100 <[email protected]> wrote:

$(2)_DOWNLOAD_POST_PROCESS = cargo
-$(2)_DL_ENV = CARGO_HOME=$$(HOST_DIR)/share/cargo +$(2)_DL_ENV += CARGO_HOME=$$(HOST_DIR)/share/cargo

Quoted 6 lines

But, but, then, how is:

PYTHON_CRYPTOGRAPHY_DL_ENV = \
BR_CARGO_MANIFEST_PATH=src/rust/Cargo.toml

currently working?

Because, its the name implies, it is a python-package, not a cargo-package.

Yeah, I got puzzled too. ;-)

Regards,
Yann E. MORIN.

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#5 lore raw
Quoted 11 lines · On Wed, 9 Feb 2022 21:55:27 +0100 "Yann E. MORIN" <[email protected]>…
Quoted 6 lines

But, but, then, how is:

PYTHON_CRYPTOGRAPHY_DL_ENV = \
BR_CARGO_MANIFEST_PATH=src/rust/Cargo.toml

currently working?

Because, its the name implies, it is a python-package, not a cargo-package.

Yeah, I got puzzled too. ;-)

Aah, yes. Indeed. A python-package that builds Rust stuff. I wonder how it's possible for me to forget this, after having spent so many hours on this particular package! :-)

Thomas

Signature · 7 lines
Thomas Petazzoni, co-owner and CEO, Bootlin
Embedded Linux and Kernel engineering and training
https://bootlin.com
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#6 lore raw

PATCH v2 2/5 package/pkg-cargo: allow building in a sub-directory

In reply to a message not in the archive

From: "Yann E. MORIN" <[email protected]>

Some packages have their rust sources as a sub-directory, rather than at the root of the source tree.

Do like we do for autotools-package, and use the package's _SRCDIR rather than the top-level directory $(@D).

Additionally, in such a situation, it is more than probable that the Cargo.toml is also present in that sub-directory, so use that when vendoring the package, unless the package took extra precautions to specify an alternate location.

Cc Thomas Petazzoni <[email protected]>

---
Changes v1 -> v2:
- fix conditional (inverted logic)
- fix syntax in conditional (missing comma)

---
 package/pkg-cargo.mk | 16 ++++++++++++----
 1 file changed, 12 insertions(+), 4 deletions(-)
package/pkg-cargo.mk +12 -4
index 66bea513e0..e1d81197b5 100644
@@ -71,6 +71,14 @@ $(2)_DOWNLOAD_DEPENDENCIES += host-rustc
 $(2)_DOWNLOAD_POST_PROCESS = cargo
 $(2)_DL_ENV += CARGO_HOME=$$(HOST_DIR)/share/cargo
 
+# If building in a sub directory, use that to find the Cargo.toml, unless
+# the package already provided its location.
+ifneq ($$($(2)_SUBDIR),)
+ifeq ($$(filter BR_CARGO_MANIFEST_PATH=%,$$($(2)_DL_ENV)),)
+$(2)_DL_ENV += BR_CARGO_MANIFEST_PATH=$$($(2)_SUBDIR)/Cargo.toml
+endif
+endif
+
 # Due to vendoring, it is pretty likely that not all licenses are
 # listed in <pkg>_LICENSE.
 $(2)_LICENSE += , vendored dependencies licenses probably not listed
@@ -97,7 +105,7 @@ $(2)_LICENSE += , vendored dependencies licenses probably not listed
 ifndef $(2)_BUILD_CMDS
 ifeq ($(4),target)
 define $(2)_BUILD_CMDS
-	cd $$(@D) && \
+	cd $$($$(PKG)_SRCDIR) && \
 	$$(TARGET_MAKE_ENV) \
 		$$(TARGET_CONFIGURE_OPTS) \
 		$$(PKG_CARGO_ENV) \
@@ -111,7 +119,7 @@ define $(2)_BUILD_CMDS
 endef
 else # ifeq ($(4),target)
 define $(2)_BUILD_CMDS
-	cd $$(@D) && \
+	cd $$($$(PKG)_SRCDIR) && \
 	$$(HOST_MAKE_ENV) \
 		RUSTFLAGS="$$(addprefix -C link-args=,$$(HOST_LDFLAGS))" \
 		$$(HOST_CONFIGURE_OPTS) \
@@ -133,7 +141,7 @@ endif # ifndef $(2)_BUILD_CMDS
 #
 ifndef $(2)_INSTALL_TARGET_CMDS
 define $(2)_INSTALL_TARGET_CMDS
-	cd $$(@D) && \
+	cd $$($$(PKG)_SRCDIR) && \
 	$$(TARGET_MAKE_ENV) \
 		$$(TARGET_CONFIGURE_OPTS) \
 		$$(PKG_CARGO_ENV) \
@@ -152,7 +160,7 @@ endif
 
 ifndef $(2)_INSTALL_CMDS
 define $(2)_INSTALL_CMDS
-	cd $$(@D) && \
+	cd $$($$(PKG)_SRCDIR) && \
 	$$(HOST_MAKE_ENV) \
 		RUSTFLAGS="$$(addprefix -C link-args=,$$(HOST_LDFLAGS))" \
 		$$(HOST_CONFIGURE_OPTS) \
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#7 lore raw

Re: [Buildroot] [PATCH 2/5 v2] package/pkg-cargo: allow building in a sub-directory

package/pkg-cargo.mk $(2)_DOWNLOAD_DEPENDENCIES += host-rustc · line 78

Quoted 5 lines · On Wed, 9 Feb 2022 17:08:44 +0100 <[email protected]> wrote:
package/pkg-cargo.mk +5 -0
+# If building in a sub directory, use that to find the Cargo.toml, unless
+# the package already provided its location.
+ifneq ($$($(2)_SUBDIR),)
+ifeq ($$(filter BR_CARGO_MANIFEST_PATH=%,$$($(2)_DL_ENV)),)
+$(2)_DL_ENV += BR_CARGO_MANIFEST_PATH=$$($(2)_SUBDIR)/Cargo.toml

I find that a bit "meh". Should we have an explicit package variable that tells the location of the Cargo.toml, instead of directly have packages pass this "magic" BR_CARGO_MANIFEST_PATH variable ?

Should $(2)_SUBDIR be documented for the cargo-package infra in the documentation ?

Thomas

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

Re: [Buildroot] [PATCH 2/5 v2] package/pkg-cargo: allow building in a sub-directory

Thomas, All,

On 2022-02-09 20:54 +0100, Thomas Petazzoni spake thusly:

Quoted 9 lines

package/pkg-cargo.mk $(2)_DOWNLOAD_DEPENDENCIES += host-rustc · line 78

Quoted 5 lines · On Wed, 9 Feb 2022 17:08:44 +0100 <[email protected]> wrote:
package/pkg-cargo.mk +5 -0
+# If building in a sub directory, use that to find the Cargo.toml, unless
+# the package already provided its location.
+ifneq ($$($(2)_SUBDIR),)
+ifeq ($$(filter BR_CARGO_MANIFEST_PATH=%,$$($(2)_DL_ENV)),)
+$(2)_DL_ENV += BR_CARGO_MANIFEST_PATH=$$($(2)_SUBDIR)/Cargo.toml

I find that a bit "meh".

I too am not fond of it, to be honest... But I am not a rust/cargo expert, by far, I wanted not to break any existing setup.

However, the cargo infra is brand new, and BR_CARGO_MANIFEST_PATH was not even advertised either, so we should probably not have to expect any package to actually use it already.

Quoted 3 lines

Should we have an explicit package variable
that tells the location of the Cargo.toml, instead of directly have packages pass this "magic" BR_CARGO_MANIFEST_PATH variable ?

I was wondering if that would even make sense to have a different _SUBDIR and BR_CARGO_MANIFEST_PATH to begin with?

We have a package here that seems to be in such a situation, though:
https://github.com/Orange-OpenSource/its-client

The Cargo.toml is in rust/ but we need to do the build in rust/its-client/ ("cargo build" works perfectly well with a virtual workspace, like is used here, but "cargo install" refuses to work, muahaha...)

Still, because of a missing Cargo.lock in that package, vendoring by Buildroot does not work eother (we'll fix that later).

So, for now, I suggest we just expect that BR_CARGO_MANIFEST_PATH is the same as _SUBDIR, and thus the conditional assignment is not needed.

If in the future we do have an actual, working situation where they differ, then we may add the necessary infra, seems like a plan?

In the meantime, I'll respin the series with the ugly conditional removed.

Quoted 2 lines

Should $(2)_SUBDIR be documented for the cargo-package infra in the documentation ?

It is not documented for any of the other infras that make use of it (autotools, cmake, python, etc...).

The only mention of _SUBDIR in the manual is about _SUBDIRS (plural) for the kernel-module sub-infra.

Thanks for the review!

Regards,
Yann E. MORIN.

Quoted 5 lines

Thomas

Signature · 3 lines
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Embedded Linux and Kernel engineering and training
https://bootlin.com
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.-----------------.--------------------:       _    :------------------.
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A message that is not in the archive (sent off-list or not yet received): 20220210150850.GA2599@tl-lnx-nyma7486

#10 lore raw

Re: [Buildroot] [PATCH 2/5 v2] package/pkg-cargo: allow building in a sub-directory

Thomas, Alll,

On 2022-02-10 16:08 +0100, MORIN Yann INNOV/IT-S spake thusly:

Quoted 7 lines

On 2022-02-09 20:54 +0100, Thomas Petazzoni spake thusly:

Quoted 2 lines

Should $(2)_SUBDIR be documented for the cargo-package infra in the documentation ?

It is not documented for any of the other infras that make use of it (autotools, cmake, python, etc...).
The only mention of _SUBDIR in the manual is about _SUBDIRS (plural) for the kernel-module sub-infra.

Scratch that, I seem to be unable to do a proper search in a webpage... :-(

I'll add it to the cargo part of the manual.

Cordialement,
Yann E. MORIN.

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_________________________________________________________________________________________________________________________

Ce message et ses pieces jointes peuvent contenir des informations confidentielles ou privilegiees et ne doivent donc
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#11 lore raw

PATCH v2 3/5 package/pkg-cargo: host-rustc is also a build dependency

In reply to a message not in the archive

From: "Yann E. MORIN" <[email protected]>

Currently, host-rustc is a download dependency, because we need cargo for the vendoring during the downlaod step.

However, when using a package in override-srcdir, there is no download step, so host-rustc is not pulled in as a dependency which breaks running the build of a single pcakge from scratch:

    $ make clean
    $ make my-rust-package
    [...]
    [...] cargo build --offline --release --manifest-path Cargo.toml --locked
    /bin/sh: cargo: command not found

We fix that by adding host-rustc as a standard dependency too.

Cc Thomas Petazzoni <[email protected]>
---
 package/pkg-cargo.mk | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)
package/pkg-cargo.mk +3 -1
index e1d81197b5..24dd50e399 100644
@@ -65,8 +65,10 @@ HOST_PKG_CARGO_ENV = \
 
 define inner-cargo-package
 
-# We need host-rustc to run cargo
+# We need host-rustc to run cargo at download time (for vendoring),
+# and at build and install time.
 $(2)_DOWNLOAD_DEPENDENCIES += host-rustc
+$(2)_DEPENDENCIES += host-rustc
 
 $(2)_DOWNLOAD_POST_PROCESS = cargo
 $(2)_DL_ENV += CARGO_HOME=$$(HOST_DIR)/share/cargo
Signature · 20 lines
2.25.1


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Acked-by Thomas Petazzoni on v2 3/5
#12 lore raw

Re: [Buildroot] [PATCH 3/5 v2] package/pkg-cargo: host-rustc is also a build dependency

Quoted 4 lines · On Wed, 9 Feb 2022 17:08:45 +0100 <[email protected]> wrote:

From: "Yann E. MORIN" <[email protected]>

Currently, host-rustc is a download dependency, because we need cargo for the vendoring during the downlaod step.

                                ^^^^^^^^ download
Quoted 3 lines

However, when using a package in override-srcdir, there is no download step, so host-rustc is not pulled in as a dependency which breaks running the build of a single pcakge from scratch:

                                ^^^^^^  package
Quoted 10 lines
    $ make clean
    $ make my-rust-package
    [...]
    [...] cargo build --offline --release --manifest-path Cargo.toml --locked
    /bin/sh: cargo: command not found

We fix that by adding host-rustc as a standard dependency too.

Cc Thomas Petazzoni <[email protected]>
Signature · 7 lines
Thomas Petazzoni, co-owner and CEO, Bootlin
Embedded Linux and Kernel engineering and training
https://bootlin.com
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#13 lore raw

PATCH v2 4/5 package/pkg-golang: allow packages to define download environment

In reply to a message not in the archive

From: "Yann E. MORIN" <[email protected]>

Currently, the golang infrastructure forcibly sets the package _DL_ENV variable, instead of appending to it, which prevents packages from providing their own download environment variables.

We fix that by using an append-assignment.

Note: when introduced, that variable was explicitly not documented, and is supposed to only be used by packages infrastructures. However, that variable exists, and it can be (ab)used by br2-external packages (most probably to ill effects, but heh!). We anyway leave it undocumented, like _ROOTFS_PRE_CMD_HOOKS.

Cc Thomas Petazzoni <[email protected]>
Cc Christian Stewart <[email protected]>
Cc Anisse Astier <[email protected]>
---
 package/pkg-golang.mk | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
package/pkg-golang.mk +1 -1
index 35bcb1673b..69eae02830 100644
@@ -83,7 +83,7 @@ endef
 $(2)_POST_PATCH_HOOKS += $(2)_GEN_GOMOD
 
 $(2)_DOWNLOAD_POST_PROCESS = go
-$(2)_DL_ENV = \
+$(2)_DL_ENV += \
 	$(HOST_GO_COMMON_ENV) \
 	GOPROXY=direct \
 	BR_GOMOD=$$($(2)_GOMOD)
Signature · 20 lines
2.25.1


_________________________________________________________________________________________________________________________

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Acked-by Thomas Petazzoni on v2 4/5
#14 lore raw

Re: [Buildroot] [PATCH 4/5 v2] package/pkg-golang: allow packages to define download environment

Quoted 14 lines · On Wed, 9 Feb 2022 17:08:46 +0100 <[email protected]> wrote:

From: "Yann E. MORIN" <[email protected]>

Currently, the golang infrastructure forcibly sets the package _DL_ENV variable, instead of appending to it, which prevents packages from providing their own download environment variables.

We fix that by using an append-assignment.

Note: when introduced, that variable was explicitly not documented, and is supposed to only be used by packages infrastructures. However, that variable exists, and it can be (ab)used by br2-external packages (most probably to ill effects, but heh!). We anyway leave it undocumented, like _ROOTFS_PRE_CMD_HOOKS.

Quoted 4 lines
Cc Thomas Petazzoni <[email protected]>
Cc Christian Stewart <[email protected]>
Cc Anisse Astier <[email protected]>
Signature · 7 lines
Thomas Petazzoni, co-owner and CEO, Bootlin
Embedded Linux and Kernel engineering and training
https://bootlin.com
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Reviewed-by Christian Stewart on v2 4/5
#15 lore raw

Re: [Buildroot] [PATCH 4/5 v2] package/pkg-golang: allow packages to define download environment

In reply to [email protected]

Hi,

package/pkg-golang.mk

Quoted 25 lines · On Wed, Feb 9, 2022 at 8:09 AM <[email protected]> wrote:

From: "Yann E. MORIN" <[email protected]>

Currently, the golang infrastructure forcibly sets the package _DL_ENV variable, instead of appending to it, which prevents packages from providing their own download environment variables.

We fix that by using an append-assignment.

Note: when introduced, that variable was explicitly not documented, and is supposed to only be used by packages infrastructures. However, that variable exists, and it can be (ab)used by br2-external packages (most probably to ill effects, but heh!). We anyway leave it undocumented, like _ROOTFS_PRE_CMD_HOOKS.

Cc Thomas Petazzoni <[email protected]>
Cc Christian Stewart <[email protected]>
Cc Anisse Astier <[email protected]>
---
 package/pkg-golang.mk | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
package/pkg-golang.mk +0 -0
index 35bcb1673b..69eae02830 100644

Best,
Christian
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#16 lore raw

PATCH v2 5/5 package/pkg-golang: host-go is also a build dependency

In reply to a message not in the archive

From: "Yann E. MORIN" <[email protected]>

Currently, host-go is a download dependency, because we need go for the vendoring during the downlaod step.

However, when using a package in override-srcdir, there is no download step, so host-go is not pulled in as a dependency, which will break the build of a single package from scratch.

We fix that by adding host-go as a standard dependency too.

Cc Thomas Petazzoni <[email protected]>
Cc Christian Stewart <[email protected]>
Cc Anisse Astier <[email protected]>
---
 package/pkg-golang.mk | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)
package/pkg-golang.mk +3 -1
index 69eae02830..ddefdf1214 100644
@@ -47,8 +47,10 @@ $(2)_BUILD_OPTS += \
 	-trimpath \
 	-p $(PARALLEL_JOBS)
 
-# Target packages need the Go compiler on the host.
+# Target packages need the Go compiler on the host at download time (for
+# vendoring), and at build and install time.
 $(2)_DOWNLOAD_DEPENDENCIES += host-go
+$(2)_DEPENDENCIES += host-go
 
 $(2)_BUILD_TARGETS ?= .
 
Signature · 20 lines
2.25.1


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Acked-by Thomas Petazzoni on v2 5/5
#17 lore raw

Re: [Buildroot] [PATCH 5/5 v2] package/pkg-golang: host-go is also a build dependency

Quoted 9 lines · On Wed, 9 Feb 2022 17:08:47 +0100 <[email protected]> wrote:

From: "Yann E. MORIN" <[email protected]>

Currently, host-go is a download dependency, because we need go for the vendoring during the downlaod step.

However, when using a package in override-srcdir, there is no download step, so host-go is not pulled in as a dependency, which will break the build of a single package from scratch.

Quoted 6 lines

We fix that by adding host-go as a standard dependency too.

Cc Thomas Petazzoni <[email protected]>
Cc Christian Stewart <[email protected]>
Cc Anisse Astier <[email protected]>
Signature · 7 lines
Thomas Petazzoni, co-owner and CEO, Bootlin
Embedded Linux and Kernel engineering and training
https://bootlin.com
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Reviewed-by Christian Stewart on v2 5/5
#18 lore raw

Re: [Buildroot] [PATCH 5/5 v2] package/pkg-golang: host-go is also a build dependency

In reply to [email protected]

package/pkg-golang.mk

Quoted 22 lines · On Wed, Feb 9, 2022 at 8:09 AM <[email protected]> wrote:

From: "Yann E. MORIN" <[email protected]>

Currently, host-go is a download dependency, because we need go for the vendoring during the downlaod step.

However, when using a package in override-srcdir, there is no download step, so host-go is not pulled in as a dependency, which will break the build of a single package from scratch.

We fix that by adding host-go as a standard dependency too.

Cc Thomas Petazzoni <[email protected]>
Cc Christian Stewart <[email protected]>
Cc Anisse Astier <[email protected]>
---
 package/pkg-golang.mk | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)
package/pkg-golang.mk +0 -0
index 69eae02830..ddefdf1214 100644

Best,
Christian
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