From 858dab5a0ad7dd7831165d7a8ba8a06c5bf79a9c Mon Sep 17 00:00:00 2001
From: Takumi Sueda <puhitaku@gmail.com>
Date: Sat, 6 Mar 2021 20:19:11 +0900
Subject: [PATCH] Select appropriate CROSS_COMPILE and target

---
 Makefile       | 19 ++++++++++++-------
 tools/getcross | 26 ++++++++++++++++++++++++++
 2 files changed, 38 insertions(+), 7 deletions(-)
 create mode 100755 tools/getcross

diff --git a/Makefile b/Makefile
index c5b9206..f628724 100644
--- a/Makefile
+++ b/Makefile
@@ -1,7 +1,8 @@
 JOBS=$(shell grep -c '^processor' /proc/cpuinfo)
 
+UBOOT_CROSS=$(shell ./tools/getcross u-boot)
+LINUX_CROSS=$(shell ./tools/getcross linux)
 export ARCH=arm
-export CROSS_COMPILE=arm-linux-gnueabi-
 
 .PHONY:
 setup:
@@ -33,11 +34,11 @@ udefconfig-%:
 
 .PHONY:
 usavedefconfig:
-	make -C ./u-boot-brain savedefconfig
+	make CROSS_COMPILE=$(UBOOT_CROSS) -C ./u-boot-brain savedefconfig
 
 .PHONY:
 umenuconfig:
-	make -C ./u-boot-brain menuconfig
+	make CROSS_COMPILE=$(UBOOT_CROSS) -C ./u-boot-brain menuconfig
 
 .PHONY:
 uclean:
@@ -45,7 +46,11 @@ uclean:
 
 .PHONY:
 ubuild:
-	make -j$(JOBS) -C ./u-boot-brain u-boot.sb
+	if [ "$(UBOOT_CROSS)" = "arm-linux-gnueabi-" ]; then \
+		make CROSS_COMPILE=$(UBOOT_CROSS) -j$(JOBS) -C ./u-boot-brain u-boot.sb; \
+	else \
+		make CROSS_COMPILE=$(UBOOT_CROSS) -j$(JOBS) -C ./u-boot-brain u-boot.imx; \
+	fi
 
 .PHONY:
 ldefconfig:
@@ -53,11 +58,11 @@ ldefconfig:
 
 .PHONY:
 lmenuconfig:
-	make -C ./linux-brain menuconfig
+	make CROSS_COMPILE=$(LINUX_CROSS) -C ./linux-brain menuconfig
 
 .PHONY:
 lsavedefconfig:
-	make -C ./linux-brain savedefconfig
+	make CROSS_COMPILE=$(LINUX_CROSS) -C ./linux-brain savedefconfig
 	mv ./linux-brain/defconfig ./linux-brain/arch/arm/configs/brain_defconfig
 
 .PHONY:
@@ -66,7 +71,7 @@ lclean:
 
 .PHONY:
 lbuild:
-	make -j$(JOBS) -C ./linux-brain
+	make CROSS_COMPILE=$(LINUX_CROSS) -j$(JOBS) -C ./linux-brain
 
 .PHONY:
 uuu:
diff --git a/tools/getcross b/tools/getcross
new file mode 100755
index 0000000..1ae8e5c
--- /dev/null
+++ b/tools/getcross
@@ -0,0 +1,26 @@
+#!/bin/sh
+set -e
+
+uboot() {
+    . ./u-boot-brain/.config
+    case "${CONFIG_SYS_CPU}" in
+        arm926ejs) echo -n "arm-linux-gnueabi-"; return;;
+        armv7) echo -n "arm-linux-gnueabihf-"; return;;
+        *) exit 1;;
+    esac
+}
+
+linux() {
+    . ./linux-brain/.config
+    case "${CONFIG_CPU_ARM926T}_${CONFIG_ARCH_MULTI_V7}" in
+        y_) echo -n "arm-linux-gnueabi-"; return;;
+        _y) echo -n "arm-linux-gnueabihf-"; return;;
+        *) exit 1;;
+    esac
+}
+
+case "$1" in
+    u-boot) uboot ;;
+    linux) linux ;;
+    *) exit 1; ;;
+esac