XCode 6.4 Compilation Error----Undefined symbols for Architecture i386: "_fwrite$unix2003"

Error in emulator iphone4s and iphone5 using Xcode

Compile-time error description:

 for Architecture i386:   " _fwrite$unix2003 ", referenced from:

At first it felt like a. A file was not compiled separately i386,x86_64 caused, after recompilation

Lipo-Info xxxx.a

The. A file was found to support I386,X86_64, but the compilation did not pass.

After searching some information on the Internet, we find that the solution needs to add a. c file to the project.

#include <stdio.h>#include<unistd.h>#include<string.h>#include<stdlib.h>FILE*FOPEN$UNIX2003 (Const Char*filename,Const Char*mode) {    returnfopen (filename, mode);}intFPUTS$UNIX2003 (Const Char*res1, FILE *res2) {    returnfputs (res1,res2);}intNANOSLEEP$UNIX2003 (intval) {    returnUsleep (val);}Char* STRERROR$UNIX2003 (interrornum) {    returnstrerror (ErrorNum);}DoubleSTRTOD$UNIX2003 (Const Char*nptr,Char**endptr) {    returnstrtod (nptr, endptr);} size_t fwrite$unix2003 (Const void*a, size_t B, size_t C, FILE *d) {    returnFwrite (A, B, C, D);}

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XCode 6.4 Compilation Error----Undefined symbols for Architecture i386: "_fwrite$unix2003"