How to compile C under Ubuntu Linux

Question

I cut amp pasted the below code from a previous question into a file called  avishay cpp  and then ran   gcc avishay cpp   only to get the following error messages from the linker  What went wrong  what should I have done   carl carl-ubuntu   Projects StackOverflow  gcc -static avishay cpp   tmp cccRNW34 o  In function    static initialization and destruction 0 int  int    avishay cpp   text 0x41   undefined reference to  std  ios base  Init  Init    avishay cpp   text 0x46   undefined reference to  std  ios base  Init   Init     tmp cccRNW34 o  In function  A  func     avishay cpp   text  ZN1A4funcEv A  func    0x11   undefined reference to  std  cout  avishay cpp   text  ZN1A4funcEv A  func    0x16   undefined reference to  std  basic ostream lt char  std  char traits lt char gt   gt  amp  std  operator lt  lt   lt std  char traits lt char gt   gt  std  basic ostream lt char  std  char traits lt char gt   gt  amp   char const    avishay cpp   text  ZN1A4funcEv A  func    0x1e   undefined reference to  std  basic ostream lt char  std  char traits lt char gt   gt  amp  std  endl lt char  std  char traits lt char gt   gt  std  basic ostream lt char  std  char traits lt char gt   gt  amp    avishay cpp   text  ZN1A4funcEv A  func    0x26   undefined reference to  std  basic ostream lt char  std  char traits lt char gt   gt   operator lt  lt  std  basic ostream lt char  std  char traits lt char gt   gt  amp      std  basic ostream lt char  std  char traits lt char gt   gt  amp     avishay cpp   text  ZN1A4funcEv A  func    0x36   undefined reference to  std  cout  avishay cpp   text  ZN1A4funcEv A  func    0x3b   undefined reference to  std  basic ostream lt char  std  char traits lt char gt   gt   operator lt  lt  int    tmp cccRNW34 o   eh frame 0x12   undefined reference to    gxx personality v0  collect2  ld returned 1 exit status   The C   code  not my code  I was just trying to run it     include  lt iostream gt  using namespace std   class A   private     int  dmember   public     void func             cout lt  lt  Inside A     lt  lt endl       cout lt  lt  dmember     crash when reach here           int main            A  a  NULL       a- gt func       prints  Inside A           return 1

User · Accepted Answer

You should use g    not gcc  to compile C   programs   For this particular program  I just typed  make avishay   and let make figure out the rest  Gives your executable a decent name  too  instead of a out

User · Answer

Use      g     space followed by the program name   e g      g   prog cpp   if the filename was  prog cpp  in this case  if you want to run the program write     prog   so i used      prog    because it was my filename

User · Answer

To compile source cpp  run   g   source cpp   This command will compile source cpp to file a out in the same directory  To run the compiled file  run     a out   If you compile another source file  with g   source2 cpp  the new compiled file a out will overwrite the a out generated with source cpp  If you want to compile source cpp to a specific file  say compiledfile  run   g   source cpp -o compiledfile   or  g   -o compiledfile source cpp   This will create the compiledfile which is the compiled binary file  to run the compiledfile  run    compiledfile   If g   is not in your  PATH  replace g   with  usr bin g

User · Answer

even you can compile your c   code by gcc  Sounds funny    Yes it is  try it     gcc avishay cpp -lstdc     enjoy

User · Answer

Yes  use g   to compile  It will automatically add all the references to libstdc   which are necessary to link the program   g   source cpp -o source   If you omit the -o parameter  the resultant executable will be named a out  In any case  executable permissions have already been set  so no need to chmod anything   Also  the code will give you undefined behaviour  and probably a SIGSEGV  as you are dereferencing a NULL pointer and trying to call a member function on an object that doesn t exist  so it most certainly will not print anything  It will probably crash or do some funky dance

User · Answer

You probably should use g   rather than gcc

User · Answer

Update your apt-get     sudo apt-get update   sudo apt-get install g     Run your program cpp     g   program cpp     a out

User · Answer

Use g    And make sure you have the relevant libraries installed

User · Answer

g   is the C   compiler under linux  The code looks right  It is possible that you are missing a library reference which is used as such   g   -l library name here  math fns use  m    codefile cpp

User · Answer

you can use g   --std c  0x example cpp -o example

User · Answer

Install gcc and try the video below  Try this  https   www youtube com watch v A6v2Ceqy4Tk Hope it will works for you

[c++] How to compile C++ under Ubuntu Linux?

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