[PATCH v3 1/7] u-boot: make KCFLAGS and HOSTCFLAGS configurable

[Felix Moessbauer <felix.moessbauer@siemens.com>]

For more complex u-boot configurations, custom compiler flags are
required to e.g. inject more include paths or set the bits per long.
This patch adds the bitbake variables KCFLAGS and HOSTCFLAGS which are
forwarded and exported in the rules file.

Signed-off-by: Felix Moessbauer <felix.moessbauer@siemens.com>
---
 meta/recipes-bsp/u-boot/files/debian/rules.tmpl | 5 ++++-
 meta/recipes-bsp/u-boot/u-boot-custom.inc       | 5 ++++-
 2 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/meta/recipes-bsp/u-boot/files/debian/rules.tmpl b/meta/recipes-bsp/u-boot/files/debian/rules.tmpl
index 806b01fe..a29ec9b1 100755
--- a/meta/recipes-bsp/u-boot/files/debian/rules.tmpl
+++ b/meta/recipes-bsp/u-boot/files/debian/rules.tmpl
@@ -3,7 +3,7 @@
 # Debian rules for custom U-Boot build
 #
 # This software is a part of ISAR.
-# Copyright (c) Siemens AG, 2018-2021
+# Copyright (c) Siemens AG, 2018-2023
 #
 # SPDX-License-Identifier: MIT
 
@@ -12,6 +12,9 @@ export CROSS_COMPILE=$(DEB_HOST_GNU_TYPE)-
 SET_CROSS_BUILD_TOOLS=CROSS_BUILD_TOOLS=y
 endif
 
+export KCFLAGS=${KCFLAGS}
+export HOSTCFLAGS=${HOSTCFLAGS}
+
 override_dh_auto_build:
 	$(MAKE) $(PARALLEL_MAKE) ${U_BOOT_CONFIG}
 	$(MAKE) $(PARALLEL_MAKE) ${U_BOOT_BIN}
diff --git a/meta/recipes-bsp/u-boot/u-boot-custom.inc b/meta/recipes-bsp/u-boot/u-boot-custom.inc
index 876eb361..1e9744b1 100644
--- a/meta/recipes-bsp/u-boot/u-boot-custom.inc
+++ b/meta/recipes-bsp/u-boot/u-boot-custom.inc
@@ -26,8 +26,11 @@ python() {
 
 DEBIAN_BUILD_DEPENDS ?= "bc, bison, flex, device-tree-compiler, git"
 
+KCFLAGS ?= ""
+HOSTCFLAGS ?= ""
+
 TEMPLATE_FILES = "debian/control.tmpl debian/rules.tmpl"
-TEMPLATE_VARS += "MACHINE DEBIAN_BUILD_DEPENDS U_BOOT_CONFIG U_BOOT_BIN"
+TEMPLATE_VARS += "MACHINE DEBIAN_BUILD_DEPENDS U_BOOT_CONFIG U_BOOT_BIN KCFLAGS HOSTCFLAGS"
 
 U_BOOT_TOOLS_PACKAGE ?= "0"
 U_BOOT_CONFIG_PACKAGE ?= "0"
-- 
2.30.2