Merge pull request #17 from esp8266/esp8266

pull latest changes

cores/esp8266/libc_replacements.c

@@ -175,6 +175,9 @@ char* ICACHE_FLASH_ATTR strtok_r(char * str, const char * delimiters, char ** te
     uint32_t size = 0;
 
     if(str == NULL) {
+        if(temp == NULL) {
+            return NULL;
+        }
         start = *temp;
     } else {
         start = str;
@@ -184,6 +187,10 @@ char* ICACHE_FLASH_ATTR strtok_r(char * str, const char * delimiters, char ** te
         return NULL;
     }
 
+    if(delimiters == NULL) {
+        return NULL;
+    }
+
     end = start;
 
     while(1) {
@@ -211,7 +218,9 @@ char* ICACHE_FLASH_ATTR strtok_r(char * str, const char * delimiters, char ** te
 }
 
 char* ICACHE_FLASH_ATTR strtok(char * str, const char * delimiters) {
-    return strtok_r(str, delimiters, NULL);
+    static char * ret = NULL;
+    ret = strtok_r(str, delimiters, &ret);
+    return ret;
 }
 
 int strcasecmp(const char * str1, const char * str2) {

libraries/ESP8266WebServer/examples/HelloServer/HelloServer.ino

@@ -69,6 +69,5 @@ void setup(void){
 }
  
 void loop(void){
-  mdns.update();
   server.handleClient();
 } 

libraries/ESP8266WebServer/examples/SDWebServer/SDWebServer.ino

@@ -308,6 +308,5 @@ void setup(void){
 }
  
 void loop(void){
-  //mdns.update();
   server.handleClient();
 }

libraries/ESP8266WiFi/src/WiFiUdp.cpp

@@ -21,6 +21,7 @@
 */
 
 #define LWIP_INTERNAL
+#include <functional>
   
 extern "C" 
 {
@@ -168,7 +169,6 @@ int WiFiUDP::endPacket()
         return 0;
 
     _ctx->send();
-    _ctx->disconnect();
     return 1;
 }
 

libraries/ESP8266WiFi/src/include/UdpContext.h

@@ -28,9 +28,13 @@ extern "C" void esp_schedule();
 
 #define GET_IP_HDR(pb) reinterpret_cast<ip_hdr*>(((uint8_t*)((pb)->payload)) - UDP_HLEN - IP_HLEN);
 #define GET_UDP_HDR(pb) reinterpret_cast<udp_hdr*>(((uint8_t*)((pb)->payload)) - UDP_HLEN);
+
 class UdpContext
 {
 public:
+
+    typedef std::function<void(void)> rxhandler_t;
+
     UdpContext()
     : _pcb(0)
     , _rx_buf(0)
@@ -40,8 +44,11 @@ public:
     , _tx_buf_head(0)
     , _tx_buf_cur(0)
     , _tx_buf_offset(0)
+    , _multicast_ttl(1)
+    , _dest_port(0)
     {
         _pcb = udp_new();
+        _dest_addr.addr = 0;
     }
 
     ~UdpContext()
@@ -79,8 +86,9 @@ public:
 
     bool connect(ip_addr_t addr, uint16_t port)
     {
-        err_t err = udp_connect(_pcb, &addr, port);
+        _dest_addr = addr;
-        return err == ERR_OK;
+        _dest_port = port;
+        return true;
     }
 
     bool listen(ip_addr_t addr, uint16_t port)
@@ -107,7 +115,13 @@ public:
         // newer versions of lwip have an additional field (mcast_ttl) for this purpose
         // and a macro to set it instead of direct field access
         // udp_set_multicast_ttl(_pcb, ttl);
-        _pcb->ttl = ttl;
+        _multicast_ttl = ttl;
+    }
+
+    // warning: handler is called from tcp stack context
+    // esp_yield and non-reentrant functions which depend on it will fail
+    void onRx(rxhandler_t handler) {
+        _on_rx = handler;
     }
 
     size_t getSize() const
@@ -173,10 +187,10 @@ public:
         return _rx_buf != 0;
     }
 
-    char read()
+    int read()
     {
         if (!_rx_buf || _rx_buf->len == _rx_buf_offset)
-            return 0;
+            return -1;
 
         char c = reinterpret_cast<char*>(_rx_buf->payload)[_rx_buf_offset];
         _consume(1);
@@ -190,7 +204,7 @@ public:
 
         size_t max_size = _rx_buf->len - _rx_buf_offset;
         size = (size < max_size) ? size : max_size;
-        DEBUGV(":rd %d, %d, %d\r\n", size, _rx_buf->len, _rx_buf_offset);
+        DEBUGV(":urd %d, %d, %d\r\n", size, _rx_buf->len, _rx_buf_offset);
         
         os_memcpy(dst, reinterpret_cast<char*>(_rx_buf->payload) + _rx_buf_offset, size);        
         _consume(size);
@@ -257,10 +271,19 @@ public:
             }
         }
 
-        if (addr)
+        if (!addr) {
+            addr = &_dest_addr;
+            port = _dest_port;
+        }
+
+        uint16_t old_ttl = _pcb->ttl;
+        if (ip_addr_ismulticast(addr)) {
+            _pcb->ttl = _multicast_ttl;
+        }
+
         udp_sendto(_pcb, _tx_buf_head, addr, port);
-        else
+
-            udp_send(_pcb, _tx_buf_head);
+        _pcb->ttl = old_ttl;
 
         for (pbuf* p = _tx_buf_head; p; p = p->next)
         {
@@ -281,7 +304,7 @@ private:
 
     void _reserve(size_t size)
     {
-        const size_t pbuf_unit_size = 1024;
+        const size_t pbuf_unit_size = 512;
         if (!_tx_buf_head)
         {
             _tx_buf_head = pbuf_alloc(PBUF_TRANSPORT, pbuf_unit_size, PBUF_RAM);
@@ -317,16 +340,19 @@ private:
         {
             // there is some unread data
             // chain the new pbuf to the existing one
-            DEBUGV(":rch %d, %d\r\n", _rx_buf->tot_len, pb->tot_len);
+            DEBUGV(":urch %d, %d\r\n", _rx_buf->tot_len, pb->tot_len);
             pbuf_cat(_rx_buf, pb);
         }
         else
         {
-            DEBUGV(":rn %d\r\n", pb->tot_len);
+            DEBUGV(":urn %d\r\n", pb->tot_len);
             _first_buf_taken = false;
             _rx_buf = pb;
             _rx_buf_offset = 0;
         }
+        if (_on_rx) {
+            _on_rx();
+        }
     }
 
 
@@ -341,6 +367,11 @@ private:
     int _refcnt;
     udp_pcb* _pcb;
 
+    ip_addr_t _dest_addr;
+    uint16_t _dest_port;
+
+    uint16_t _multicast_ttl;
+
     bool _first_buf_taken;
     pbuf* _rx_buf;
     size_t _rx_buf_offset;
@@ -348,6 +379,8 @@ private:
     pbuf* _tx_buf_head;
     pbuf* _tx_buf_cur;
     size_t _tx_buf_offset;
+
+    rxhandler_t _on_rx;
 };
 
 

libraries/ESP8266mDNS/ESP8266mDNS.cpp

@@ -42,6 +42,10 @@ License (MIT license):
 #define TTL_OFFSET 4
 #define IP_OFFSET 10
 
+static const IPAddress MDNS_MULTICAST_ADDR(224, 0, 0, 251);
+static const int MDNS_MULTICAST_TTL = 1;
+static const int MDNS_PORT = 5353;
+
 
 MDNSResponder::MDNSResponder()
   : _expected(NULL)
@@ -49,6 +53,7 @@ MDNSResponder::MDNSResponder()
   , _response(NULL)
   , _responseLen(0)
   , _index(0)
+  , _conn(0)
 { }
 
 MDNSResponder::~MDNSResponder() {
@@ -149,21 +154,37 @@ bool MDNSResponder::begin(const char* domain, IPAddress addr, uint32_t ttlSecond
   records[IP_OFFSET + 0] = (uint8_t) ipAddress;
   
   // Open the MDNS socket if it isn't already open.
-  if (!_mdnsConn) {
+  if (!_conn) {
-    if (!_mdnsConn.beginMulticast(addr, IPAddress(224, 0, 0, 251), 5353)) {
+    ip_addr_t ifaddr;
+    ifaddr.addr = (uint32_t) addr;
+    ip_addr_t multicast_addr;
+    multicast_addr.addr = (uint32_t) MDNS_MULTICAST_ADDR;
+
+    if (igmp_joingroup(&ifaddr, &multicast_addr)!= ERR_OK) {
       return false;
     }
-  }
 
+    _conn = new UdpContext;
+    _conn->ref();
+
+    if (!_conn->listen(*IP_ADDR_ANY, MDNS_PORT)) {
+      return false;
+    }
+    _conn->setMulticastInterface(ifaddr);
+    _conn->setMulticastTTL(MDNS_MULTICAST_TTL);
+    _conn->onRx(std::bind(&MDNSResponder::update, this));
+    _conn->connect(multicast_addr, MDNS_PORT);
+  }
   return true;
 }
 
 void MDNSResponder::update() {
-  if (!_mdnsConn.parsePacket())
+  if (!_conn->next()) {
     return; 
+  }
 
   // Read available data.
-  int n = _mdnsConn.available();
+  int n = _conn->getSize();
 
   _index = 0;
 
@@ -172,7 +193,7 @@ void MDNSResponder::update() {
 #endif
   // Look for domain name in request and respond with canned response if found.
   for (int i = 0; i < n; ++i) {
-    uint8_t ch = tolower(_mdnsConn.read());
+    uint8_t ch = tolower(_conn->read());
 
 #ifdef MDNS_DEBUG
     String str(ch, 16);
@@ -191,9 +212,12 @@ void MDNSResponder::update() {
         Serial.print("responding, i=");
         Serial.println(i);
 #endif
-        _mdnsConn.beginPacketMulticast(IPAddress(224, 0, 0, 251), 5353, _localAddr);
+        ip_addr_t multicast_addr;
-        _mdnsConn.write(_response, _responseLen);
+        multicast_addr.addr = (uint32_t) MDNS_MULTICAST_ADDR;
-        _mdnsConn.endPacket();
+
+        _conn->append(reinterpret_cast<const char*>(_response), _responseLen);
+        _conn->send();
+
         _index = 0;
       }
     }

libraries/ESP8266mDNS/ESP8266mDNS.h

@@ -46,6 +46,9 @@ License (MIT license):
 #include "ESP8266WiFi.h"
 #include "WiFiUdp.h"
 
+
+class UdpContext;
+
 class MDNSResponder {
 public:
   MDNSResponder();
@@ -63,7 +66,7 @@ private:
   uint8_t* _response;
   int _responseLen;
   // Socket for MDNS communication
-  WiFiUDP _mdnsConn;
+  UdpContext* _conn;
   // local IP Address
   IPAddress _localAddr;
 };

libraries/ESP8266mDNS/examples/mDNS_Web_Server/mDNS_Web_Server.ino

@@ -68,9 +68,6 @@ void setup(void)
 
 void loop(void)
 {
-  // Check for any mDNS queries and send responses
-  mdns.update();
-  
   // Check if a client has connected
   WiFiClient client = server.available();
   if (!client) {

libraries/SD/src/SD.cpp

@@ -345,8 +345,6 @@ boolean SDClass::begin(uint8_t csPin, uint32_t speed) {
          root.openRoot(volume);
 }
 
-
-
 // this little helper is used to traverse paths
 SdFile SDClass::getParentDir(const char *filepath, int *index) {
   // get parent directory

libraries/SD/src/utility/Sd2Card.cpp

@@ -33,9 +33,13 @@ static void spiSend(uint8_t b) {
   SPDR = b;
   while (!(SPSR & (1 << SPIF)))
     ;
+#else
+#ifdef ESP8266
+  SPI.write(b);
 #else
   SPI.transfer(b);
 #endif
+#endif
 }
 /** Receive a byte from the card */
 static  uint8_t spiRec(void) {
@@ -116,8 +120,14 @@ uint8_t Sd2Card::cardCommand(uint8_t cmd, uint32_t arg) {
   // send command
   spiSend(cmd | 0x40);
 
+#ifdef ESP8266
+  // send argument
+  SPI.write32(arg, true);
+#else
   // send argument
   for (int8_t s = 24; s >= 0; s -= 8) spiSend(arg >> s);
+#endif
+
 
   // send CRC
   uint8_t crc = 0xFF;
@@ -424,7 +434,14 @@ uint8_t Sd2Card::readData(uint32_t block,
   dst[n] = SPDR;
 
 #else  // OPTIMIZE_HARDWARE_SPI
+#ifdef ESP8266
+  // skip data before offset
+  SPI.transferBytes(NULL, NULL, offset_);
 
+  // transfer data
+  SPI.transferBytes(NULL, dst, count);
+
+#else
   // skip data before offset
   for (;offset_ < offset; offset_++) {
     spiRec();
@@ -433,6 +450,7 @@ uint8_t Sd2Card::readData(uint32_t block,
   for (uint16_t i = 0; i < count; i++) {
     dst[i] = spiRec();
   }
+#endif
 #endif  // OPTIMIZE_HARDWARE_SPI
 
   offset_ += count;
@@ -463,7 +481,11 @@ void Sd2Card::readEnd(void) {
     while (!(SPSR & (1 << SPIF)))
       ;
 #else  // OPTIMIZE_HARDWARE_SPI
+#ifdef ESP8266
+    SPI.transferBytes(NULL, NULL, (514-offset_));
+#else
     while (offset_++ < 514) spiRec();
+#endif
 #endif  // OPTIMIZE_HARDWARE_SPI
     chipSelectHigh();
     inBlock_ = 0;
@@ -479,7 +501,11 @@ uint8_t Sd2Card::readRegister(uint8_t cmd, void* buf) {
   }
   if (!waitStartBlock()) goto fail;
   // transfer data
+#ifdef ESP8266
+  SPI.transferBytes(NULL, dst, 16);
+#else
   for (uint16_t i = 0; i < 16; i++) dst[i] = spiRec();
+#endif
   spiRec();  // get first crc byte
   spiRec();  // get second crc byte
   chipSelectHigh();
@@ -646,13 +672,21 @@ uint8_t Sd2Card::writeData(uint8_t token, const uint8_t* src) {
 
 #else  // OPTIMIZE_HARDWARE_SPI
   spiSend(token);
+#ifdef ESP8266
+  // send argument
+  SPI.writeBytes((uint8_t *)src, 512);
+#else
   for (uint16_t i = 0; i < 512; i++) {
     spiSend(src[i]);
   }
+#endif
 #endif  // OPTIMIZE_HARDWARE_SPI
+#ifdef ESP8266
+  SPI.write16(0xFFFF, true);
+#else
   spiSend(0xff);  // dummy crc
   spiSend(0xff);  // dummy crc
-
+#endif
   status_ = spiRec();
   if ((status_ & DATA_RES_MASK) != DATA_RES_ACCEPTED) {
     error(SD_CARD_ERROR_WRITE);

libraries/SPI/SPI.cpp

@@ -36,6 +36,7 @@ typedef union {
 SPIClass SPI;
 
 SPIClass::SPIClass() {
+    useHwCs = false;
 }
 
 void SPIClass::begin() {
@@ -54,9 +55,26 @@ void SPIClass::end() {
     pinMode(SCK, INPUT);
     pinMode(MISO, INPUT);
     pinMode(MOSI, INPUT);
+    if(useHwCs) {
+        pinMode(SS, INPUT);
+    }
+}
+
+void SPIClass::setHwCs(bool use) {
+    if(use) {
+        pinMode(SS, SPECIAL); ///< GPIO15
+        SPI1U |= (SPIUCSSETUP | SPIUCSHOLD);
+    } else {
+        if(useHwCs) {
+            pinMode(SS, INPUT);
+            SPI1U &= ~(SPIUCSSETUP | SPIUCSHOLD);
+        }
+    }
+    useHwCs = use;
 }
 
 void SPIClass::beginTransaction(SPISettings settings) {
+    while(SPI1CMD & SPIBUSY) {}
     setFrequency(settings._clock);
     setBitOrder(settings._bitOrder);
     setDataMode(settings._dataMode);
@@ -198,13 +216,19 @@ void SPIClass::setClockDivider(uint32_t clockDiv) {
     SPI1CLK = clockDiv;
 }
 
+inline void SPIClass::setDataBits(uint16_t bits) {
+    const uint32_t mask = ~((SPIMMOSI << SPILMOSI) | (SPIMMISO << SPILMISO));
+    bits--;
+    SPI1U1 = ((SPI1U1 & mask) | ((bits << SPILMOSI) | (bits << SPILMISO)));
+}
+
 uint8_t SPIClass::transfer(uint8_t data) {
-    while(SPI1CMD & SPIBUSY)
+    while(SPI1CMD & SPIBUSY) {}
-        ;
+    // reset to 8Bit mode
+    setDataBits(8);
     SPI1W0 = data;
     SPI1CMD |= SPIBUSY;
-    while(SPI1CMD & SPIBUSY)
+    while(SPI1CMD & SPIBUSY) {}
-        ;
     return (uint8_t) (SPI1W0 & 0xff);
 }
 
@@ -230,3 +254,177 @@ uint16_t SPIClass::transfer16(uint16_t data) {
     return out.val;
 }
 
+void SPIClass::write(uint8_t data) {
+    while(SPI1CMD & SPIBUSY) {}
+    // reset to 8Bit mode
+    setDataBits(8);
+    SPI1W0 = data;
+    SPI1CMD |= SPIBUSY;
+    while(SPI1CMD & SPIBUSY) {}
+}
+
+void SPIClass::write16(uint16_t data) {
+    write16(data, !(SPI1C & (SPICWBO | SPICRBO)));
+}
+
+void SPIClass::write16(uint16_t data, bool msb) {
+    while(SPI1CMD & SPIBUSY) {}
+    // Set to 16Bits transfer
+    setDataBits(16);
+    if(msb) {
+        // MSBFIRST Byte first
+        SPI1W0 = (data >> 8) | (data << 8);
+        SPI1CMD |= SPIBUSY;
+    } else {
+        // LSBFIRST Byte first
+        SPI1W0 = data;
+        SPI1CMD |= SPIBUSY;
+    }
+    while(SPI1CMD & SPIBUSY) {}
+}
+
+void SPIClass::write32(uint32_t data) {
+    write32(data, !(SPI1C & (SPICWBO | SPICRBO)));
+}
+
+void SPIClass::write32(uint32_t data, bool msb) {
+    while(SPI1CMD & SPIBUSY) {}
+    // Set to 32Bits transfer
+    setDataBits(32);
+    if(msb) {
+        union {
+                uint32_t l;
+                uint8_t b[4];
+        } data_;
+        data_.l = data;
+        // MSBFIRST Byte first
+        SPI1W0 = (data_.b[3] | (data_.b[2] << 8) | (data_.b[1] << 16) | (data_.b[0] << 24));
+        SPI1CMD |= SPIBUSY;
+    } else {
+        // LSBFIRST Byte first
+        SPI1W0 = data;
+        SPI1CMD |= SPIBUSY;
+    }
+    while(SPI1CMD & SPIBUSY) {}
+}
+
+void SPIClass::writeBytes(uint8_t * data, uint32_t size) {
+    while(size) {
+        if(size > 64) {
+            writeBytes_(data, 64);
+            size -= 64;
+            data += 64;
+        } else {
+            writeBytes_(data, size);
+            size = 0;
+        }
+    }
+}
+
+void SPIClass::writeBytes_(uint8_t * data, uint8_t size) {
+    while(SPI1CMD & SPIBUSY) {}
+    // Set Bits to transfer
+    setDataBits(size * 8);
+
+    volatile uint32_t * fifoPtr = &SPI1W0;
+    uint32_t * dataPtr = (uint32_t*) data;
+    uint8_t dataSize = ((size + 3) / 4);
+
+    while(dataSize--) {
+        *fifoPtr = *dataPtr;
+        dataPtr++;
+        fifoPtr++;
+    }
+
+    SPI1CMD |= SPIBUSY;
+    while(SPI1CMD & SPIBUSY) {}
+}
+
+void SPIClass::writePattern(uint8_t * data, uint8_t size, uint32_t repeat) {
+    if(size > 64) return; //max Hardware FIFO
+
+    uint32_t byte = (size * repeat);
+    uint8_t r = (64 / size);
+
+    while(byte) {
+        if(byte > 64) {
+            writePattern_(data, size, r);
+            byte -= 64;
+        } else {
+            writePattern_(data, size, (byte / size));
+            byte = 0;
+        }
+    }
+}
+
+void SPIClass::writePattern_(uint8_t * data, uint8_t size, uint8_t repeat) {
+    uint8_t bytes = (size * repeat);
+    uint8_t buffer[64];
+    uint8_t * bufferPtr = &buffer[0];
+    uint8_t * dataPtr;
+    uint8_t dataSize = bytes;
+    for(uint8_t i = 0; i < repeat; i++) {
+        dataSize = size;
+        dataPtr = data;
+        while(dataSize--) {
+            *bufferPtr = *dataPtr;
+            dataPtr++;
+            bufferPtr++;
+        }
+    }
+
+    writeBytes(&buffer[0], bytes);
+}
+
+void SPIClass::transferBytes(uint8_t * out, uint8_t * in, uint32_t size) {
+    while(size) {
+        if(size > 64) {
+            transferBytes_(out, in, 64);
+            size -= 64;
+            if(out) out += 64;
+            if(in) in += 64;
+        } else {
+            transferBytes_(out, in, size);
+            size = 0;
+        }
+    }
+}
+
+void SPIClass::transferBytes_(uint8_t * out, uint8_t * in, uint8_t size) {
+    while(SPI1CMD & SPIBUSY) {}
+    // Set in/out Bits to transfer
+
+    setDataBits(size * 8);
+
+    volatile uint32_t * fifoPtr = &SPI1W0;
+    uint8_t dataSize = ((size + 3) / 4);
+
+    if(out) {
+        uint32_t * dataPtr = (uint32_t*) out;
+        while(dataSize--) {
+            *fifoPtr = *dataPtr;
+            dataPtr++;
+            fifoPtr++;
+        }
+    } else {
+        // no out data only read fill with dummy data!
+        while(dataSize--) {
+            *fifoPtr = 0xFFFFFFFF;
+            fifoPtr++;
+        }
+    }
+
+    SPI1CMD |= SPIBUSY;
+    while(SPI1CMD & SPIBUSY) {}
+
+    if(in) {
+        volatile uint8_t * fifoPtr8 = (volatile uint8_t *) &SPI1W0;
+        dataSize = size;
+        while(dataSize--) {
+            *in = *fifoPtr8;
+            in++;
+            fifoPtr8++;
+        }
+    }
+}
+

libraries/SPI/SPI.h

@@ -64,6 +64,7 @@ public:
   SPIClass();
   void begin();
   void end();
+  void setHwCs(bool use);
   void setBitOrder(uint8_t bitOrder);  
   void setDataMode(uint8_t dataMode);
   void setFrequency(uint32_t freq);
@@ -71,7 +72,21 @@ public:
   void beginTransaction(SPISettings settings);
   uint8_t transfer(uint8_t data);
   uint16_t transfer16(uint16_t data);
+  void write(uint8_t data);
+  void write16(uint16_t data);
+  void write16(uint16_t data, bool msb);
+  void write32(uint32_t data);
+  void write32(uint32_t data, bool msb);
+  void writeBytes(uint8_t * data, uint32_t size);
+  void writePattern(uint8_t * data, uint8_t size, uint32_t repeat);
+  void transferBytes(uint8_t * out, uint8_t * in, uint32_t size);
   void endTransaction(void);
+private:
+  bool useHwCs;
+  void writeBytes_(uint8_t * data, uint8_t size);
+  void writePattern_(uint8_t * data, uint8_t size, uint8_t repeat);
+  void transferBytes_(uint8_t * out, uint8_t * in, uint8_t size);
+  inline void setDataBits(uint16_t bits);
 };
 
 extern SPIClass SPI;

platform.txt

@@ -23,7 +23,7 @@ compiler.S.flags=-c -g -x assembler-with-cpp -MMD
 compiler.c.elf.ldscript=eagle.app.v6.ld
 compiler.c.elf.flags=-nostdlib -Wl,--no-check-sections -u call_user_start -Wl,-static "-L{compiler.sdk.path}/lib" "-L{compiler.sdk.path}/ld" "-T{compiler.c.elf.ldscript}"
 compiler.c.elf.cmd=xtensa-lx106-elf-gcc
-compiler.c.elf.libs=-lm -lc -lgcc -lhal -lphy -lnet80211 -llwip -lwpa -lmain -lpp -lsmartconfig
+compiler.c.elf.libs=-lm -lgcc -lhal -lphy -lnet80211 -llwip -lwpa -lmain -lpp -lsmartconfig
 
 compiler.cpp.cmd=xtensa-lx106-elf-g++
 compiler.cpp.flags=-c -Os -mlongcalls -mtext-section-literals -fno-exceptions -fno-rtti -std=c++11 -MMD