diff mbox series

[3/6] kbuild: deb-pkg: set DEB_* variables if debian/rules is directly executed

Message ID 20231226135243.1393780-3-masahiroy@kernel.org
State New
Headers
Series [1/6] kbuild: deb-pkg: factor out common Make options in debian/rules |

Commit Message

Masahiro Yamada Dec. 26, 2023, 1:52 p.m. UTC 
  Since commit 491b146d4c13 ("kbuild: builddeb: Eliminate debian/arch
use"), direct execution of debian/rules results in the following error:

  dpkg-architecture: error: unknown option 'DEB_HOST_MULTIARCH'

The current code:

  dpkg-architecture -a$DEB_HOST_ARCH -qDEB_HOST_MULTIARCH

... does not look sensible because:

 - For this code to work correctly, DEB_HOST_ARCH must be pre-defined,
   which is true when the packages are built via dpkg-buildpackage.
   In this case, DEB_HOST_MULTIARCH is also likely defined, hence there
   is no need to query DEB_HOST_MULTIARCH in the first place.

 - If DEB_HOST_MULTIARCH is undefined, DEB_HOST_ARCH is likely undefined
   too. So, you cannot query DEB_HOST_MULTIARCH in this way. This is
   mostly the case where debian/rules is directly executed.

When debian/rules is directly executed, querying DEB_HOST_MUCHARCH is
not enough because we need to know DEB_{BUILD,HOST}_GNU_TYPE as well.

All DEB_* variables are defined when the package build is initiated by
dpkg-buildpackage, but otherwise, let's call dpkg-architecture to set
all DEB_* environment variables.

This implementation relies on dpkg commit 7c54fa2b232e
("dpkg-architecture: Add a --print-format option").

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---

 scripts/package/builddeb     |  5 ++---
 scripts/package/debian/rules | 12 +++++++++++-
 2 files changed, 13 insertions(+), 4 deletions(-)

Comments

Nicolas Schier Dec. 27, 2023, 8:08 a.m. UTC | #1 
On Tue, Dec 26, 2023 at 10:52:40PM +0900, Masahiro Yamada wrote:
> Since commit 491b146d4c13 ("kbuild: builddeb: Eliminate debian/arch
> use"), direct execution of debian/rules results in the following error:
> 
>   dpkg-architecture: error: unknown option 'DEB_HOST_MULTIARCH'
> 
> The current code:
> 
>   dpkg-architecture -a$DEB_HOST_ARCH -qDEB_HOST_MULTIARCH
> 
> ... does not look sensible because:
> 
>  - For this code to work correctly, DEB_HOST_ARCH must be pre-defined,
>    which is true when the packages are built via dpkg-buildpackage.
>    In this case, DEB_HOST_MULTIARCH is also likely defined, hence there
>    is no need to query DEB_HOST_MULTIARCH in the first place.
> 
>  - If DEB_HOST_MULTIARCH is undefined, DEB_HOST_ARCH is likely undefined
>    too. So, you cannot query DEB_HOST_MULTIARCH in this way. This is
>    mostly the case where debian/rules is directly executed.
> 
> When debian/rules is directly executed, querying DEB_HOST_MUCHARCH is
> not enough because we need to know DEB_{BUILD,HOST}_GNU_TYPE as well.
> 
> All DEB_* variables are defined when the package build is initiated by
> dpkg-buildpackage, but otherwise, let's call dpkg-architecture to set
> all DEB_* environment variables.
> 
> This implementation relies on dpkg commit 7c54fa2b232e
> ("dpkg-architecture: Add a --print-format option").
> 
> Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
> ---
> 
>  scripts/package/builddeb     |  5 ++---
>  scripts/package/debian/rules | 12 +++++++++++-
>  2 files changed, 13 insertions(+), 4 deletions(-)
> 
> diff --git a/scripts/package/builddeb b/scripts/package/builddeb
> index 2fe51e6919da..2eb4910f0ef3 100755
> --- a/scripts/package/builddeb
> +++ b/scripts/package/builddeb
> @@ -171,9 +171,8 @@ install_libc_headers () {
>  
>  	# move asm headers to /usr/include/<libc-machine>/asm to match the structure
>  	# used by Debian-based distros (to support multi-arch)
> -	host_arch=$(dpkg-architecture -a$DEB_HOST_ARCH -qDEB_HOST_MULTIARCH)
> -	mkdir $pdir/usr/include/$host_arch
> -	mv $pdir/usr/include/asm $pdir/usr/include/$host_arch/
> +	mkdir "$pdir/usr/include/${DEB_HOST_MULTIARCH}"
> +	mv "$pdir/usr/include/asm" "$pdir/usr/include/${DEB_HOST_MULTIARCH}"
>  }
>  
>  rm -f debian/files
> diff --git a/scripts/package/debian/rules b/scripts/package/debian/rules
> index 529b71b55efa..8f24a8e84bf2 100755
> --- a/scripts/package/debian/rules
> +++ b/scripts/package/debian/rules
> @@ -30,5 +30,15 @@ build-arch:
>  
>  .PHONY: clean
>  clean:
> -	rm -rf debian/files debian/linux-*
> +	rm -rf debian/files debian/linux-* debian/deb-env.vars
>  	$(MAKE) -f $(srctree)/Makefile ARCH=$(ARCH) clean
> +
> +# If DEB_HOST_ARCH is empty, it is likely that debian/rules was executed
> +# directly. Run 'dpkg-architecture --print-set --print-format=make' to
> +# generate a makefile construct that exports all DEB_* variables.
> +ifndef DEB_HOST_ARCH
> +-include debian/deb-env.vars
> +
> +debian/deb-env.vars:
> +	dpkg-architecture -a$$(cat debian/arch) --print-set --print-format=make > $@
> +endif
> -- 
> 2.40.1

Thanks!

Reviewed-by: Nicolas Schier <n.schier@avm.de>
diff mbox series

Patch

diff --git a/scripts/package/builddeb b/scripts/package/builddeb
index 2fe51e6919da..2eb4910f0ef3 100755
--- a/scripts/package/builddeb
+++ b/scripts/package/builddeb
@@ -171,9 +171,8 @@  install_libc_headers () {
 
 	# move asm headers to /usr/include/<libc-machine>/asm to match the structure
 	# used by Debian-based distros (to support multi-arch)
-	host_arch=$(dpkg-architecture -a$DEB_HOST_ARCH -qDEB_HOST_MULTIARCH)
-	mkdir $pdir/usr/include/$host_arch
-	mv $pdir/usr/include/asm $pdir/usr/include/$host_arch/
+	mkdir "$pdir/usr/include/${DEB_HOST_MULTIARCH}"
+	mv "$pdir/usr/include/asm" "$pdir/usr/include/${DEB_HOST_MULTIARCH}"
 }
 
 rm -f debian/files
diff --git a/scripts/package/debian/rules b/scripts/package/debian/rules
index 529b71b55efa..8f24a8e84bf2 100755
--- a/scripts/package/debian/rules
+++ b/scripts/package/debian/rules
@@ -30,5 +30,15 @@  build-arch:
 
 .PHONY: clean
 clean:
-	rm -rf debian/files debian/linux-*
+	rm -rf debian/files debian/linux-* debian/deb-env.vars
 	$(MAKE) -f $(srctree)/Makefile ARCH=$(ARCH) clean
+
+# If DEB_HOST_ARCH is empty, it is likely that debian/rules was executed
+# directly. Run 'dpkg-architecture --print-set --print-format=make' to
+# generate a makefile construct that exports all DEB_* variables.
+ifndef DEB_HOST_ARCH
+-include debian/deb-env.vars
+
+debian/deb-env.vars:
+	dpkg-architecture -a$$(cat debian/arch) --print-set --print-format=make > $@
+endif