[Buildroot] [PATCH v2] package/environment-setup: add variable KERNEL_DIR alongside KERNELDIR

[Nayab Sayed]

Update host environment setup helper script to incorporate the variable
KENREL_DIR alongside the existing KERNELDIR. This adjustment ensures
consistency, as some projects utilize KERNELDIR while others use KERNEL_DIR.

Signed-off-by: Nayab Sayed <nayabbasha.sayed at microchip.com>
---
Changes in v2:
- Keep both KERNEL_DIR and KERNELDIR.
- Update commit message
- Link to v1: https://lore.kernel.org/r/20240124-kernel_dir-v1-1-4125408cf65d@microchip.com
---
 package/environment-setup/environment-setup    | 3 ++-
 package/environment-setup/environment-setup.mk | 2 ++
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/package/environment-setup/environment-setup b/package/environment-setup/environment-setup
index 84a9843c24..0bae813e1a 100644
--- a/package/environment-setup/environment-setup
+++ b/package/environment-setup/environment-setup
@@ -10,7 +10,8 @@ cat <<'EOF'
 Some tips:
 * PATH now contains the SDK utilities
 * Standard autotools variables (CC, LD, CFLAGS) are exported
-* Kernel compilation variables (ARCH, CROSS_COMPILE, KERNELDIR) are exported
+* Kernel compilation variables (ARCH, CROSS_COMPILE, KERNELDIR or KERNEL_DIR)
+  are exported
 * To configure do "./configure $CONFIGURE_FLAGS" or use
   the "configure" alias
 * To build CMake-based projects, use the "cmake" alias
diff --git a/package/environment-setup/environment-setup.mk b/package/environment-setup/environment-setup.mk
index 29ec5a9a95..4a71f18f3a 100644
--- a/package/environment-setup/environment-setup.mk
+++ b/package/environment-setup/environment-setup.mk
@@ -35,6 +35,8 @@ define HOST_ENVIRONMENT_SETUP_INSTALL_CMDS
 
 	$(if $(BR2_LINUX_KERNEL),\
 		printf "export \"KERNELDIR=$(LINUX_BUILDDIR)\"\n" \
+			>> $(ENVIRONMENT_SETUP_FILE)
+		printf "export \"KERNEL_DIR=$(LINUX_BUILDDIR)\"\n" \
 			>> $(ENVIRONMENT_SETUP_FILE),)
 endef
 

---
base-commit: 04dfeff6242516a1061973fc7af2cc9c5e3dd4e2
change-id: 20240124-kernel_dir-41a48fd97b75

Best regards,
-- 
Nayab Sayed <nayabbasha.sayed at microchip.com>