undefined reference to std ios base Init Init

Question

I write this code to read 3 files  TM is the size of square matrix  LER the No  of rows of an array and from last value define a non-square matrix of  ler 2  2  Then    the code read a file with some relations  all are numbers and are assign to C ler    Then     C ler  is assigned to B ler 2  2    Those coordinates  per row  in B ler 2  2  are assign to a and b   a and b are the row and the column of the matrix A tm  tm  where to add 1   My code crashes and I don t see what the error is   When I try to compile it  the compiler gcc -g -o MatSim MatSim cpp prompted    usr include c   4 6 iostream 75  undefined reference to  std  ios base  Init  Init     usr include c   4 6 iostream 75  undefined reference to  std  ios base  Init   Init    collect2  ld returned 1 exit status   Also  when I try to compile it  the compiler f77 -o MatSim MatSim cpp prompted    tmp cc6ewlkf o  In function    static initialization and destruction 0 int  int    MatSim cpp   text 0x17ad4a   undefined reference to  std  ios base  Init  Init    MatSim cpp   text 0x17ad4f   undefined reference to  std  ios base  Init   Init    collect2  ld returned 1 exit status   Solution  The main problem was a library problem  Compile your code using    g   -g -o MatSim MatSim cpp -lstdc   Still not working   Install libraries   sudo apt-get install g  -multilib

User · Answer

Most of these linker errors occur because of missing libraries.

I added the libstdc++.6.dylib in my Project->Targets->Build Phases-> Link Binary With Libraries.

That solved it for me on Xcode 6.3.2 for iOS 8.3

Cheers!

User · Answer

You can resolve this in several ways    Use g   in stead of gcc  g   -g -o MatSim MatSim cpp Add -lstdc    gcc -g -o MatSim MatSim cpp -lstdc   Replace  lt string h gt  by  lt string gt    This is a linker problem  not a compiler issue  The same problem is covered in the question iostream linker error  ndash  it explains what is going on

[c] undefined reference to `std::ios_base::Init::Init()'

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