在了mkinifiy，下载了客服给的资料，安上keil，破解好，编译minifly1.1的文件，找不到stdloob.h文件。还有三角函数的警告。特请教下大神们，这是什么原因。
compiling freeRTOSdebug.c...
..HARDWAREinterfaceled.h(4): error:  #5: cannot open source input file "stdbool.h": No such file or directory
  #include <stdbool.h>
..COMMONsrcfreeRTOSdebug.c: 0 warnings, 1 error
compiling filter.c...
..COMMONsrcfilter.c(69): warning:  #223-D: function "tanf" declared implicitly
          float ohm = tanf(M_PI_F/fr);
..COMMONsrcfilter.c(70): warning:  #223-D: function "cosf" declared implicitly
          float c = 1.0f+2.0f*cosf(M_PI_F/4.0f)*ohm+ohm*ohm;
..COMMONsrcfilter.c(83): warning:  #223-D: function "isfinite" declared implicitly
          if (!isfinite(delay_element_0))
..COMMONsrcfilter.c: 3 warnings, 0 errors
"..OBJFirmware_F411.axf" - 52 Error(s), 3 Warning(s).