linux-samsung-m20lte: build with gcc6

Part of the wider effort to switch downstream kernels away from the regular
gcc package. While it would be best to switch this kernel to use LLVM,
gcc6 is the best option to prevent runtime breakages and still keep the
process of switching easy. If the maintainer wishes, they can try porting
this package to use LLVM later.

See https://gitlab.postmarketos.org/postmarketOS/postmarketos/-/work_items/123
and https://gitlab.postmarketos.org/postmarketOS/pmaports/-/work_items/3928
for more information.

Signed-off-by: Aster Boese <asterboese@mailbox.org>
Part-of: <https://gitlab.postmarketos.org/postmarketOS/pmaports/-/merge_requests/9054>

device/downstream/linux-samsung-m20lte/APKBUILD

@@ -4,7 +4,7 @@
 maintainer="Diego Stocco <diegostocco.2008@gmail.com>"
 pkgname=linux-samsung-m20lte
 pkgver=4.4.177
-pkgrel=1
+pkgrel=2
 _commit="339a04eabab9310ad9f6039831f6834d7f9d3c2b"
 pkgdesc="Samsung Galaxy M20 kernel fork"
 arch="aarch64"
@@ -20,6 +20,7 @@ makedepends="
 	dtbtool-exynos
 	findutils
 	flex
+	gcc6
 	openssl-dev
 	perl
 "
@@ -39,6 +40,13 @@ options="!check !strip !tracedeps pmb:cross-native"
 builddir="$srcdir/android_kernel_samsung_universal7904-$_commit"
 _outdir="out"
 
+# Compiler: GCC 6 (not tested with LLVM)
+if [ "${CC:0:5}" != "gcc6-" ]; then
+	CC="gcc6-$CC"
+	HOSTCC="gcc6-gcc"
+	CROSS_COMPILE="gcc6-$CROSS_COMPILE"
+fi
+
 prepare() {
 	default_prepare
 	. downstreamkernel_prepare
@@ -46,7 +54,7 @@ prepare() {
 
 build() {
 	unset LDFLAGS
-	make O="$_outdir" ARCH="$_carch" CC="${CC:-gcc}" \
+	make O="$_outdir" ARCH="$_carch" \
 		KBUILD_BUILD_VERSION="$((pkgrel + 1 ))-postmarketOS"
 
 	# deviceinfo_bootimg_qcdt
@@ -75,7 +83,7 @@ package() {
 
 sha512sums="
 663f7cff6dee546104a34f38ba27f89211ef40514e4ebdf63d4bc60a523f31d831e349060b70cc407498a33044ced3d0e806b8325c07f7b5a3b829d610bef490  linux-samsung-m20lte-339a04eabab9310ad9f6039831f6834d7f9d3c2b.tar.gz
-93c5aa1ad25a32a11aaba114ad16dc4a31595b8466594c3c76ae362db590a8b0c0f5d0a160b242fe5275052e9e9b26fa1367959441065e7127c325a5dc19367a  config-samsung-m20lte.aarch64
+9e845c05b97670855eea16b85241948b1c94625cb38af32e2001f72acac6c68cb97ddc845449cf8d22886c2a93ad26d749089df317bbad17cb49ec24ebdb0e31  config-samsung-m20lte.aarch64
 4bff19e4711dc5363520ae2d5f165e82d9588d51858a3f1ea48f77fde5a1674ee23bbed8a270a11ec48c0877d27cc28a393ba58ba87f8f2c97fd6abe8495efc3  cross-compile.patch
 182be3c596b9cc267ac108d7cf03fc8c328ccc6b36770800e4dcedea8d1bb65e3f5eacf590c2948f58b1418cc60a1670ba77dde8c259e428d158c31b6e1dbaf5  fix-check-lxdialog.patch
 2038a0e7b3a076e83e4a8fa2e5d35650c52f947985ca58310aaf94211756eef1635bb3c8e047a77ecc0a69de55f49be37081bfd570e49031b2397a9d6de87285  fix-scsc-kconfig.patch

device/downstream/linux-samsung-m20lte/config-samsung-m20lte.aarch64

@@ -1674,7 +1674,7 @@ CONFIG_INPUT_MOUSEDEV_PSAUX=y
 CONFIG_INPUT_MOUSEDEV_SCREEN_X=1024
 CONFIG_INPUT_MOUSEDEV_SCREEN_Y=768
 # CONFIG_INPUT_JOYDEV is not set
-CONFIG_INPUT_EVDEV=y
+CONFIG_INPUT_EVDEV=m
 # CONFIG_INPUT_EVBUG is not set
 CONFIG_INPUT_KEYRESET=y
 # CONFIG_GLOVE_TOUCH is not set
@@ -4837,7 +4837,7 @@ CONFIG_NLS_CODEPAGE_437=y
 # CONFIG_NLS_ISO8859_8 is not set
 # CONFIG_NLS_CODEPAGE_1250 is not set
 # CONFIG_NLS_CODEPAGE_1251 is not set
-# CONFIG_NLS_ASCII is not set
+CONFIG_NLS_ASCII=m
 CONFIG_NLS_ISO8859_1=y
 # CONFIG_NLS_ISO8859_2 is not set
 # CONFIG_NLS_ISO8859_3 is not set