From ddb1daecd9b71852c672add6c7cf6009417cda91 Mon Sep 17 00:00:00 2001
From: Stepan Pressl <pressl.stepan@gmail.com>
Date: Thu, 7 Aug 2025 02:17:54 +0200
Subject: [PATCH] [EXPERIMENTAL] Makefile: EXTRA_APPS_LIBS and
 EXTRA_APPS_INCPATHS vars

The variables are to be used to mainly by the export rule
to export external libraries (.a files) and respective include paths.

The exported external libraries are packed together in the libapps.a
library (basically, every .o files are extracted and then packed
together).

Signed-off-by: Stepan Pressl <pressl.stepan@gmail.com>
---
 Makefile | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/Makefile b/Makefile
index 5a357053891..8b46595b6ad 100644
--- a/Makefile
+++ b/Makefile
@@ -197,6 +197,28 @@ preconfig: Kconfig
 export:
 ifneq ($(EXPORTDIR),)
 	$(Q) mkdir -p "${EXPORTDIR}"$(DELIM)registry || exit 1;
+	if [ -n "${EXTRA_APPS_LIBS}" ]; then \
+		mkdir -p $(APPDIR)$(DELIM)libcomb; \
+		cp libapps.a $(APPDIR)$(DELIM)libcomb; \
+		for l in ${EXTRA_APPS_LIBS}; do \
+			echo "AR: $$(basename $${l})"; \
+			cp $${l} $(APPDIR)$(DELIM)libcomb; \
+		done; \
+		cd $(APPDIR)$(DELIM)libcomb; \
+		for l in *.a; do \
+			$(AR_EXTRACT) $${l}; \
+		done; \
+		$(AR) libmerged.a *.o; \
+		mv libmerged.a ..$(DELIM)libapps.a; \
+		cd ..; \
+		rm -rf $(APPDIR)$(DELIM)libcomb; \
+	fi; \
+	for d in ${EXTRA_APPS_INCPATHS}; do \
+		if [ -d "$${d}" ]; then \
+			echo "CP: $$(basename $${d})" ; \
+			cp -r "$${d}" "${EXPORTDIR}"$(DELIM)include ; \
+		fi \
+	done
 ifneq ($(CONFIG_BUILD_KERNEL),y)
 ifneq ($(BUILTIN_REGISTRY),)
 	for f in "${BUILTIN_REGISTRY}"$(DELIM)*.bdat "${BUILTIN_REGISTRY}"$(DELIM)*.pdat ; do \