new device: ASUS Zenfone Go (Z00VD)

device/linux-asus-z00vd/01_fix_warnings.patch

+diff --git a/include/linux/log2.h b/include/linux/log2.h
+index fd7ff3d91e6a..4b0c8edcb947 100644
+--- a/include/linux/log2.h
++++ b/include/linux/log2.h
+@@ -15,12 +15,6 @@
+ #include <linux/types.h>
+ #include <linux/bitops.h>
+ 
+-/*
+- * deal with unrepresentable constant logarithms
+- */
+-extern __attribute__((const, noreturn))
+-int ____ilog2_NaN(void);
+-
+ /*
+  * non-constant log of base 2 calculators
+  * - the arch may override these in asm/bitops.h if they can be implemented
+@@ -85,7 +79,7 @@ unsigned long __rounddown_pow_of_two(unsigned long n)
+ #define ilog2(n)				\
+ (						\
+ 	__builtin_constant_p(n) ? (		\
+-		(n) < 1 ? ____ilog2_NaN() :	\
++		(n) < 2 ? 0 :	\
+ 		(n) & (1ULL << 63) ? 63 :	\
+ 		(n) & (1ULL << 62) ? 62 :	\
+ 		(n) & (1ULL << 61) ? 61 :	\
+@@ -148,10 +142,7 @@ unsigned long __rounddown_pow_of_two(unsigned long n)
+ 		(n) & (1ULL <<  4) ?  4 :	\
+ 		(n) & (1ULL <<  3) ?  3 :	\
+ 		(n) & (1ULL <<  2) ?  2 :	\
+-		(n) & (1ULL <<  1) ?  1 :	\
+-		(n) & (1ULL <<  0) ?  0 :	\
+-		____ilog2_NaN()			\
+-				   ) :		\
++		1 ) :				\
+ 	(sizeof(n) <= 4) ?			\
+ 	__ilog2_u32(n) :			\
+ 	__ilog2_u64(n)				\
+
+diff --git a/Makefile b/Makefile
+index 591a38331223..8d15418cd7e7 100644
+--- a/Makefile
++++ b/Makefile
+@@ -610,6 +610,7 @@ all: vmlinux
+ include $(srctree)/arch/$(SRCARCH)/Makefile
+ 
+ KBUILD_CFLAGS	+= $(call cc-option,-fno-delete-null-pointer-checks,)
++KBUILD_CFLAGS	+= $(call cc-disable-warning, attribute-alias)
+ 
+ ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
+ KBUILD_CFLAGS	+= -Os $(call cc-disable-warning,maybe-uninitialized,)

device/linux-asus-z00vd/02_gcc8_error.patch

+diff --git a/arch/arm/include/asm/uaccess.h b/arch/arm/include/asm/uaccess.h
+index 35c9db857ebe..cd8b589111ba 100644
+--- a/arch/arm/include/asm/uaccess.h
++++ b/arch/arm/include/asm/uaccess.h
+@@ -251,7 +251,7 @@ extern int __put_user_8(void *, unsigned long long);
+ 	({								\
+ 		unsigned long __limit = current_thread_info()->addr_limit - 1; \
+ 		const typeof(*(p)) __user *__tmp_p = (p);		\
+-		register const typeof(*(p)) __r2 asm("r2") = (x);	\
++		register typeof(*(p)) __r2 asm("r2") = (x);	\
+ 		register const typeof(*(p)) __user *__p asm("r0") = __tmp_p; \
+ 		register unsigned long __l asm("r1") = __limit;		\
+ 		register int __e asm("r0");				\
+-- 
+2.18.0

device/linux-asus-z00vd/APKBUILD

+# Kernel config based on: arch/arm/configs/zc500tg_defconfig
+
+pkgname="linux-asus-z00vd"
+pkgver=3.18.41
+pkgrel=0
+pkgdesc="ASUS Zenfone Go kernel fork"
+arch="armhf"
+_carch="arm"
+_flavor="asus-z00vd"
+url="https://kernel.org"
+license="GPL2"
+options="!strip !check !tracedeps"
+makedepends="perl sed installkernel bash gmp-dev bc linux-headers elfutils-dev devicepkg-dev python2"
+
+# Compiler: latest GCC from Alpine
+HOSTCC="${CC:-gcc}"
+HOSTCC="${HOSTCC#${CROSS_COMPILE}}"
+
+# Source
+_repository="ZC500TG"
+_commit="7957ae0b17bb46d56a5cddd1d313aec76296aee8"
+_config="config-${_flavor}.${arch}"
+source="
+	$pkgname-$_commit.tar.gz::https://github.com/nik124seleznev/${_repository}/archive/${_commit}.tar.gz
+	$_config
+	01_fix_warnings.patch
+	02_gcc8_error.patch
+"
+builddir="$srcdir/${_repository}-${_commit}"
+
+prepare() {
+	default_prepare
+
+	# Remove -Werror from all makefiles
+	local i
+	local makefiles="$(find . -type f -name Makefile)
+		$(find . -type f -name Kbuild)"
+	for i in $makefiles; do
+		sed -i 's/-Werror-/-W/g' "$i"
+		sed -i 's/-Werror//g' "$i"
+	done
+
+	# Make a output folder because the kernel needs it for some reason
+	mkdir "$builddir/out"
+
+	# Clean up kernel source
+	make -C "$builddir" O="$builddir/out" ARCH="$_carch" ARCH_MTK_PLATFORM="mt6580" HOSTCC="$HOSTCC" clean
+	make -C "$builddir" O="$builddir/out" ARCH="$_carch" ARCH_MTK_PLATFORM="mt6580" HOSTCC="$HOSTCC" mrproper
+
+	# Prepare kernel config ('yes ""' for kernels lacking olddefconfig)
+	cp "$srcdir"/$_config "$builddir"/arch/$_carch/configs/zc500tg_pmos_defconfig
+	make -C "$builddir" O="$builddir/out" ARCH="$_carch" ARCH_MTK_PLATFORM="mt6580" HOSTCC="$HOSTCC" zc500tg_pmos_defconfig
+
+}
+
+build() {
+	unset LDFLAGS
+	make -C "$builddir" O="$builddir/out" ARCH="$_carch" CC="${CC:-gcc}" ARCH_MTK_PLATFORM="mt6580" \
+		KBUILD_BUILD_VERSION="$((pkgrel + 1 ))-postmarketOS"
+}
+
+package() {
+	# kernel.release
+	install -D "$builddir/out/include/config/kernel.release" \
+		"$pkgdir/usr/share/kernel/$_flavor/kernel.release"
+
+	# zImage (find the right one)
+	cd "$builddir/out/arch/$_carch/boot"
+	_target="$pkgdir/boot/vmlinuz-$_flavor"
+	for _zimg in zImage-dtb Image.gz-dtb *zImage Image; do
+		[ -e "$_zimg" ] || continue
+		msg "zImage found: $_zimg"
+		install -Dm644 "$_zimg" "$_target"
+		break
+	done
+	if ! [ -e "$_target" ]; then
+		error "Could not find zImage in $PWD!"
+		return 1
+	fi
+}
+
+sha512sums="eb4575d8d3603097141991bc207a51f3ed9281d6e1432570666aeeb3299c86574e80724e27721e2f64844fe9efdfd99df898138e1d2053f143132d1b0e89414b  linux-asus-z00vd-7957ae0b17bb46d56a5cddd1d313aec76296aee8.tar.gz
+c0bbe3df4f9f1cbd89a3817377ab1ecc45b679c852d0376f4c3bff74cee8fe1c84e90acfb56db560664e752927989c91bf8562de24a73ae3b06fde032524a86c  config-asus-z00vd.armhf
+1db0eb57279ab2b0ad70e0f93dfe6faa0d807cf24832c2e55b2c726b43cdece84edfc614e6455cddddbce890de1df80e37fd1805b9fd6ccc259047c5ef7a6ba6  01_fix_warnings.patch
+f60b91c7cffd1704e6ac51d1c352b87f74432fc645deff2ff4feeeffff3c441af425191254f871a999555b3abcd1d199eeba0c12dbef4d9364f4d70df4484976  02_gcc8_error.patch"