[PATCH v2 4/9] multiarch: Downgrade native dependencies when building in emulated environment

[Jan Kiszka <jan.kiszka@siemens.com>]

From: Jan Kiszka <jan.kiszka@siemens.com>

When a package that has -native build dependencies is forced into
non-cross building using qemu-user (ie. build arch != distro arch), its
dependency installation will generally fail. That is because
somedep-native will build somedep for the builder arch, not for the
distro arch that is needed during native builds.

Address that automatically by downgrading any such recipe dependency by
stripping for '-native'.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
---
 meta/classes/multiarch.bbclass | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/meta/classes/multiarch.bbclass b/meta/classes/multiarch.bbclass
index c1846ab0..48cec9ab 100644
--- a/meta/classes/multiarch.bbclass
+++ b/meta/classes/multiarch.bbclass
@@ -21,6 +21,18 @@ python() {
             d.appendVar('PROVIDES', f' {pn}-native')
     else:
         d.appendVar('BBCLASSEXTEND', ' native')
+
+    # drop own -native build dependencies at recipe level if building natively
+    # and not for the builder architecture
+    depends = d.getVar('DEPENDS')
+    if depends is not None and d.getVar('HOST_ARCH') != d.getVar('DISTRO_ARCH') \
+       and d.getVar('ISAR_CROSS_COMPILE') != '1':
+        new_deps = []
+        for dep in depends.split():
+            if dep.endswith('-native'):
+                dep = dep[:-7]
+            new_deps.append(dep)
+        d.setVar('DEPENDS', ' '.join(new_deps))
 }
 
 python multiarch_virtclass_handler() {
-- 
2.35.3