Fix undefined std::round compilation error (#1989)

In some implementations round is at the global scope as `::round` and some other implementations make it available as `std::round`.

The changes use the `float roundf(float)` flavor to make sure that we don't use `double round(double)` if this function isn't overloaded with the float type.

Author: devnoname120

src/IRac.cpp

@@ -13,6 +13,11 @@
 #include <string>
 #endif
 #include <cmath>
+#if __cplusplus >= 201103L && defined(_GLIBCXX_USE_C99_MATH_TR1)
+    using std::roundf;
+#else
+    using ::roundf;
+#endif
 #include "IRsend.h"
 #include "IRremoteESP8266.h"
 #include "IRtext.h"
@@ -489,9 +494,9 @@ void IRac::argo(IRArgoAC *ac,
   ac->begin();
   ac->setPower(on);
   ac->setMode(ac->convertMode(mode));
-  ac->setTemp(static_cast<uint8_t>(std::round(degrees)));
+  ac->setTemp(static_cast<uint8_t>(roundf(degrees)));
   if (sensorTemp != kNoTempValue) {
-    ac->setSensorTemp(static_cast<uint8_t>(std::round(sensorTemp)));
+    ac->setSensorTemp(static_cast<uint8_t>(roundf(sensorTemp)));
   }
   ac->setiFeel(iFeel);
   ac->setFan(ac->convertFan(fan));
@@ -537,7 +542,7 @@ void IRac::argoWrem3_ACCommand(IRArgoAC_WREM3 *ac, const bool on,
   ac->setMode(ac->convertMode(mode));
   ac->setTemp(degrees);
   if (sensorTemp != kNoTempValue) {
-    ac->setSensorTemp(static_cast<uint8_t>(std::round(sensorTemp)));
+    ac->setSensorTemp(static_cast<uint8_t>(roundf(sensorTemp)));
   }
   ac->setiFeel(iFeel);
   ac->setFan(ac->convertFan(fan));
@@ -563,7 +568,7 @@ void IRac::argoWrem3_ACCommand(IRArgoAC_WREM3 *ac, const bool on,
 void IRac::argoWrem3_iFeelReport(IRArgoAC_WREM3 *ac, const float sensorTemp) {
   ac->begin();
   ac->setMessageType(argoIrMessageType_t::IFEEL_TEMP_REPORT);
-  ac->setSensorTemp(static_cast<uint8_t>(std::round(sensorTemp)));
+  ac->setSensorTemp(static_cast<uint8_t>(roundf(sensorTemp)));
   ac->send();
 }
 
@@ -738,7 +743,7 @@ void IRac::coolix(IRCoolixAC *ac,
   // No Econo setting available.
   // No Quiet setting available.
   if (sensorTemp != kNoTempValue) {
-    ac->setSensorTemp(static_cast<uint8_t>(std::round(sensorTemp)));
+    ac->setSensorTemp(static_cast<uint8_t>(roundf(sensorTemp)));
   } else {
     ac->clearSensorTemp();
   }
@@ -1128,7 +1133,7 @@ void IRac::ecoclim(IREcoclimAc *ac,
   ac->setTemp(degrees);
   ac->setFan(ac->convertFan(fan));
   if (sensorTemp != kNoTempValue) {
-    ac->setSensorTemp(static_cast<uint8_t>(std::round(sensorTemp)));
+    ac->setSensorTemp(static_cast<uint8_t>(roundf(sensorTemp)));
   } else {
     ac->setSensorTemp(degrees);  //< Set to the desired temp
                                  //  until we can disable.
@@ -1174,7 +1179,7 @@ void IRac::electra(IRElectraAc *ac,
   ac->setMode(ac->convertMode(mode));
   ac->setTemp(degrees);
   if (sensorTemp != kNoTempValue) {
-    ac->setSensorTemp(static_cast<uint8_t>(std::round(sensorTemp)));
+    ac->setSensorTemp(static_cast<uint8_t>(roundf(sensorTemp)));
   }
   ac->setFan(ac->convertFan(fan));
   ac->setSwingV(swingv != stdAc::swingv_t::kOff);
@@ -2288,7 +2293,7 @@ void IRac::sanyo(IRSanyoAc *ac,
   ac->setMode(ac->convertMode(mode));
   ac->setTemp(degrees);
   if (sensorTemp != kNoTempValue) {
-    ac->setSensorTemp(static_cast<uint8_t>(std::round(sensorTemp)));
+    ac->setSensorTemp(static_cast<uint8_t>(roundf(sensorTemp)));
   } else {
     ac->setSensorTemp(degrees);  // Set the sensor temp to the desired
                                  // (normal) temp.