this fixes the serial driver on musl as well as on ppc

diff --git src/hardware/serialDriver.cpp src/hardware/serialDriver.cpp
index 0bb0228..d935c63 100644
--- a/src/hardware/serialDriver.cpp
+++ b/src/hardware/serialDriver.cpp
@@ -2,20 +2,31 @@
 #ifdef __WIN32__
     #include <windows.h>
 #endif
-#ifdef __gnu_linux__
+#ifdef __linux__
     //Including ioctl or termios conflicts with asm/termios.h which we need for TCGETS2. So locally define the ioctl and tcsendbreak functions. Yes, it's dirty, but it works.
     //#include <sys/ioctl.h>
     //#include <termios.h>
 #ifndef ANDROID
     extern "C" {
+#ifdef __GLIBC__
     extern int ioctl (int __fd, unsigned long int __request, ...) __THROW;
     extern int tcsendbreak (int __fd, int __duration) __THROW;
+#else
+    extern int ioctl (int, int, ...);
+    extern int tcsendbreak (int, int);
+#endif
     }
 #endif
     #include <asm/termios.h>
     #include <fcntl.h>
     #include <unistd.h>
     #include <dirent.h>
+#ifdef __powerpc__
+    /* ppc has no tcgets2 or termios2, but termios covers the same stuff */
+    #define termios2 termios
+    #define TCGETS2 TCGETS
+    #define TCSETS2 TCSETS
+#endif
 #endif
 #if defined(__APPLE__) && defined(__MACH__)
     #include <IOKit/serial/ioss.h>
@@ -57,7 +68,7 @@ SerialPort::SerialPort(string name)
         }
     }
 #endif
-#if defined(__gnu_linux__) || (defined(__APPLE__) && defined(__MACH__))
+#if defined(__linux__) || (defined(__APPLE__) && defined(__MACH__))
     if (!name.startswith("/dev/"))
         name = "/dev/" + name;
     handle = open(name.c_str(), O_RDWR | O_NOCTTY | O_NDELAY);
@@ -76,7 +87,7 @@ SerialPort::~SerialPort()
     CloseHandle(handle);
     handle = INVALID_HANDLE_VALUE;
 #endif
-#if defined(__gnu_linux__) || (defined(__APPLE__) && defined(__MACH__))
+#if defined(__linux__) || (defined(__APPLE__) && defined(__MACH__))
     close(handle);
     handle = 0;
 #endif
@@ -87,7 +98,7 @@ bool SerialPort::isOpen()
 #ifdef __WIN32__
     return handle != INVALID_HANDLE_VALUE;
 #endif
-#if defined(__gnu_linux__) || (defined(__APPLE__) && defined(__MACH__))
+#if defined(__linux__) || (defined(__APPLE__) && defined(__MACH__))
     return handle;
 #endif
     return false;
@@ -163,7 +174,7 @@ void SerialPort::configure(int baudrate, int databits, EParity parity, EStopBits
         LOG(ERROR) << "SetCommState failed!" << error;
     }
 #endif
-#ifdef __gnu_linux__
+#ifdef __linux__
     fsync(handle);
 
     struct termios2 tio;
@@ -317,7 +328,7 @@ void SerialPort::send(void* data, int data_size)
         data_size -= written;
     }
 #endif
-#if defined(__gnu_linux__) || (defined(__APPLE__) && defined(__MACH__))
+#if defined(__linux__) || (defined(__APPLE__) && defined(__MACH__))
     while(data_size > 0)
     {
         int written = write(handle, data, data_size);
@@ -345,7 +356,7 @@ int SerialPort::recv(void* data, int data_size)
     }
     return read_size;
 #endif
-#if defined(__gnu_linux__) || (defined(__APPLE__) && defined(__MACH__))
+#if defined(__linux__) || (defined(__APPLE__) && defined(__MACH__))
     int bytes_read = read(handle, data, data_size);
     if (bytes_read > 0)
         return bytes_read;
@@ -361,7 +372,7 @@ void SerialPort::setDTR()
 #ifdef __WIN32__
     EscapeCommFunction(handle, SETDTR);
 #endif
-#ifdef __gnu_linux__
+#ifdef __linux__
     int bit = TIOCM_DTR;
     ioctl(handle, TIOCMBIS, &bit);
 #endif
@@ -377,7 +388,7 @@ void SerialPort::clearDTR()
 #ifdef __WIN32__
     EscapeCommFunction(handle, CLRDTR);
 #endif
-#ifdef __gnu_linux__
+#ifdef __linux__
     int bit = TIOCM_DTR;
     ioctl(handle, TIOCMBIC, &bit);
 #endif
@@ -393,7 +404,7 @@ void SerialPort::setRTS()
 #ifdef __WIN32__
     EscapeCommFunction(handle, SETRTS);
 #endif
-#ifdef __gnu_linux__
+#ifdef __linux__
     int bit = TIOCM_RTS;
     ioctl(handle, TIOCMBIS, &bit);
 #endif
@@ -409,7 +420,7 @@ void SerialPort::clearRTS()
 #ifdef __WIN32__
     EscapeCommFunction(handle, CLRRTS);
 #endif
-#ifdef __gnu_linux__
+#ifdef __linux__
     int bit = TIOCM_RTS;
     ioctl(handle, TIOCMBIC, &bit);
 #endif
@@ -425,7 +436,7 @@ void SerialPort::sendBreak()
     Sleep(1);
     ClearCommBreak(handle);
 #endif
-#if (defined(__gnu_linux__) && !defined(ANDROID)) || (defined(__APPLE__) && defined(__MACH__))
+#if (defined(__linux__) && !defined(ANDROID)) || (defined(__APPLE__) && defined(__MACH__))
     tcsendbreak(handle, 0);
 #endif
 }
@@ -456,7 +467,7 @@ std::vector<string> SerialPort::getAvailablePorts()
         LOG(ERROR) << "Failed to open registry key for serial port list.";
     }
 #endif
-#ifdef __gnu_linux__
+#ifdef __linux__
     DIR* dir = opendir("/dev/");
     if (dir)
     {
@@ -511,7 +522,7 @@ string SerialPort::getPseudoDriverName(string port)
     }
     return ret;
 #endif
-#ifdef __gnu_linux__
+#ifdef __linux__
     FILE* f = fopen(("/sys/class/tty/" + port + "/device/modalias").c_str(), "rt");
     if (!f)
         return "";
diff --git src/hardware/serialDriver.h src/hardware/serialDriver.h
index 29cc0b5..9513457 100644
--- a/src/hardware/serialDriver.h
+++ b/src/hardware/serialDriver.h
@@ -14,7 +14,7 @@ private:
 #ifdef __WIN32__
     HANDLE handle;
 #endif
-#if defined(__gnu_linux__) || (defined(__APPLE__) && defined(__MACH__))
+#if defined(__linux__) || (defined(__APPLE__) && defined(__MACH__))
     int handle;
 #endif