Fix mysgw configure script and building RFM69 gw on 64-bit OS (mysensors#1552)

* Fix configure script errors on 64-bit OS (mysensors#1550)

Use only gcc flags relevant to aarch64 for 64-bit RPI SoCs on 64-bit
OS version

* Fix mysgw build errors on 64-bit OS (mysensors#1551)

Force data type for the parameter of min() function to avoid conflicts

Author: frepkovsky

configure

@@ -258,6 +258,7 @@ function detect_machine {
 
 function gcc_cpu_flags {
     local soc=$1
+    local cpu=$2
     case $soc in
     BCM2835)
         flags="-march=armv6zk -mtune=arm1176jzf-s -mfpu=vfp -mfloat-abi=hard"
@@ -266,10 +267,18 @@ function gcc_cpu_flags {
         flags="-march=armv7-a -mtune=cortex-a7 -mfpu=neon-vfpv4 -mfloat-abi=hard"
         ;;
     BCM2837)
-        flags="-march=armv8-a+crc -mtune=cortex-a53 -mfpu=neon-fp-armv8 -mfloat-abi=hard"
+        if [[ ${cpu} == "aarch64" ]]; then
+            flags="-march=armv8-a+crc -mtune=cortex-a53"
+        else
+            flags="-march=armv8-a+crc -mtune=cortex-a53 -mfpu=neon-fp-armv8 -mfloat-abi=hard"
+        fi
         ;;
     BCM2711)
-        flags="-march=armv8-a+crc -mtune=cortex-a72 -mfpu=neon-fp-armv8 -mfloat-abi=hard"
+        if [[ ${cpu} == "aarch64" ]]; then
+            flags="-march=armv8-a+crc -mtune=cortex-a72"
+        else
+            flags="-march=armv8-a+crc -mtune=cortex-a72 -mfpu=neon-fp-armv8 -mfloat-abi=hard"
+        fi
         ;;
     AM33XX)
         flags="-march=armv7-a -mtune=cortex-a8 -mfpu=neon -mfloat-abi=hard"
@@ -573,7 +582,7 @@ if [ -z "${SOC}" ]; then
 fi
 
 if [ -z "${CPUFLAGS}" ]; then
-    CPUFLAGS=$(gcc_cpu_flags $SOC)
+    CPUFLAGS=$(gcc_cpu_flags "${SOC}" "${CPU}")
 fi
 
 if [[ $SOC == "BCM2835" || $SOC == "BCM2836" || $SOC == "BCM2837" || $SOC == "BCM2711" ]]; then

hal/transport/RFM69/driver/new/RFM69_new.cpp

@@ -278,7 +278,8 @@ LOCAL void RFM69_interruptHandling(void)
 			             RFM69.currentPacket.header.packetLen - 1);
 
 			if (RFM69.currentPacket.header.version >= RFM69_MIN_PACKET_HEADER_VERSION) {
-				RFM69.currentPacket.payloadLen = min(RFM69.currentPacket.header.packetLen - (RFM69_HEADER_LEN - 1),
+				RFM69.currentPacket.payloadLen = min(static_cast<uint>
+				                                     (RFM69.currentPacket.header.packetLen - (RFM69_HEADER_LEN - 1)),
 				                                     RFM69_MAX_PACKET_LEN);
 				RFM69.ackReceived = RFM69_getACKReceived(RFM69.currentPacket.header.controlFlags);
 				RFM69.dataReceived = !RFM69.ackReceived;