[PATCH] xorgproto: Set ALLOW_EMPTY for the main package

[<mark.jonas@de.bosch.com>]

From: Ricardo Simoes <ricardo.simoes@pt.bosch.com>

When creating an SDK, the populate_sdk task relies on
COMPLEMENTARY_GLOB[dev-pkgs] to decide which packages to install [1].

However, xorgproto is a header-only library, so bitbake does not emit a
main package. The only reference to the -dev package is an RRECOMMENDS
from the -dbg package, and such weak links are not honored when
installing complementary packages [2].

Fix this by setting ALLOW_EMPTY for the xorgproto package. The main
package is now emitted, which makes ${PN}-dev reachable through the
complementary packages and lets recipes that depend on xorgproto be
built with the SDK.

[1] https://git.openembedded.org/openembedded-core/tree/meta/classes-recipe/populate_sdk_base.bbclass#n38
[2] https://docs.yoctoproject.org/ref-manual/variables.html#term-COMPLEMENTARY_GLOB

Signed-off-by: Ricardo Simoes <ricardo.simoes@pt.bosch.com>
Signed-off-by: Mark Jonas <mark.jonas@de.bosch.com>
---
 meta/recipes-graphics/xorg-proto/xorgproto_2025.1.bb | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/meta/recipes-graphics/xorg-proto/xorgproto_2025.1.bb b/meta/recipes-graphics/xorg-proto/xorgproto_2025.1.bb
index e187c56fbc..df09135e27 100644
--- a/meta/recipes-graphics/xorg-proto/xorgproto_2025.1.bb
+++ b/meta/recipes-graphics/xorg-proto/xorgproto_2025.1.bb
@@ -23,3 +23,6 @@ DEV_PKG_DEPENDENCY = ""
 RRECOMMENDS:${PN}-dbg = "${PN}-dev (= ${EXTENDPKGV})"
 
 BBCLASSEXTEND = "native nativesdk"
+
+# This is a header only library - thus everything lands in the -dev package
+ALLOW_EMPTY:${PN} = "1"
-- 
2.34.1