[openwrt/openwrt] build: align SOURCE path for build system and SDK

[LEDE Commits]

ansuel pushed a commit to openwrt/openwrt.git, branch main:
https://git.openwrt.org/cbc7393294960861a50681ef84914858748f5c6b

commit cbc7393294960861a50681ef84914858748f5c6b
Author: Paul Spooren <mail at aparcar.org>
AuthorDate: Mon Feb 12 16:59:50 2024 +0100

    build: align SOURCE path for build system and SDK
    
    Building a package in the build system or the SDK results in different
    values for the `SOURCE` property, it's either `packages/<package name>`
    or `feeds/base/<package name>`. The reason is that the SDK handles
    `openwrt.git` as an external feed called while the build system contains
    the *base* packages directly.
    
    Since packages created with either method are (ideally) the same (bit
    for bit), align the content of SOURCE. To do so this commit creates a
    symlink from `feeds/base` to `$(TOPDIR)/package` and adopts the SOURCE
    when building from inside the build system.
    
    Signed-off-by: Paul Spooren <mail at aparcar.org>
---
 include/package-defaults.mk | 2 +-
 include/toplevel.mk         | 3 ++-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/include/package-defaults.mk b/include/package-defaults.mk
index 30b112c7d8..392aad0d5d 100644
--- a/include/package-defaults.mk
+++ b/include/package-defaults.mk
@@ -20,7 +20,7 @@ define Package/Default
   PROVIDES:=
   EXTRA_DEPENDS:=
   MAINTAINER:=$(PKG_MAINTAINER)
-  SOURCE:=$(patsubst $(TOPDIR)/%,%,$(CURDIR))
+  SOURCE:=$(patsubst $(TOPDIR)/%,%,$(patsubst $(TOPDIR)/package/%,feeds/base/%,$(CURDIR)))
   ifneq ($(PKG_VERSION),)
     ifneq ($(PKG_RELEASE),)
       VERSION:=$(PKG_VERSION)-$(PKG_RELEASE)
diff --git a/include/toplevel.mk b/include/toplevel.mk
index f2dfde60cf..4ec99b30de 100644
--- a/include/toplevel.mk
+++ b/include/toplevel.mk
@@ -77,7 +77,8 @@ _ignore = $(foreach p,$(IGNORE_PACKAGES),--ignore $(p))
 
 prepare-tmpinfo: FORCE
 	@+$(MAKE) -r -s $(STAGING_DIR_HOST)/.prereq-build $(PREP_MK)
-	mkdir -p tmp/info
+	mkdir -p tmp/info feeds
+	[ -e $(TOPDIR)/feeds/base ] || ln -sf $(TOPDIR)/package $(TOPDIR)/feeds/base
 	$(_SINGLE)$(NO_TRACE_MAKE) -j1 -r -s -f include/scan.mk SCAN_TARGET="packageinfo" SCAN_DIR="package" SCAN_NAME="package" SCAN_DEPTH=5 SCAN_EXTRA=""
 	$(_SINGLE)$(NO_TRACE_MAKE) -j1 -r -s -f include/scan.mk SCAN_TARGET="targetinfo" SCAN_DIR="target/linux" SCAN_NAME="target" SCAN_DEPTH=3 SCAN_EXTRA="" SCAN_MAKEOPTS="TARGET_BUILD=1"
 	for type in package target; do \