Compiling a C program with gcc

Question

Question  How to compile a C   program with gcc compiler   info c    include lt iostream gt  using std  cout  using std  endl  int main         ifdef   cplusplus    cout  lt  lt   C   compiler in use and version is    lt  lt    cplusplus  lt  lt  endl      endif    cout  lt  lt  Version is    lt  lt    STDC VERSION    lt  lt  endl     cout  lt  lt   Hi   lt  lt    FILE    lt  lt    LINE    lt  lt  endl      and when I try to compile info c     gcc info C  Undefined                       first referenced  symbol                             in file cout                                 var tmp ccPxLN2a o endl ostream  amp                        var tmp ccPxLN2a o ostream  operator lt  lt  ostream  amp     ostream  amp    var tmp ccPxLN2a o ostream  operator lt  lt  int              var tmp ccPxLN2a o ostream  operator lt  lt  long             var tmp ccPxLN2a o ostream  operator lt  lt  char const       var tmp ccPxLN2a o ld  fatal  Symbol referencing errors  No output written to a out collect2  ld returned 1 exit status   Isn t gcc compiler capable of compiling C   programs  On a related note  what is the difference between gcc and g    Thanks

User · Answer

The difference between gcc and g   are        gcc                     g   compiles c source       compiles c   source   use g   instead of gcc to compile you c   source

User · Answer

If you give the code a  c extension the compiler thinks it is C code  not C    And the C   compiler driver is called g    if you use the gcc driver you will have linker problems  as the standard C   libraries will not be linked by default  So you want   g   myprog cpp   And do not even consider using an uppercase  C extension  unless you never want to port your code  and are prepared to be hated by those you work with

User · Answer

gcc can actually compile c   code just fine  The errors you received are linker errors  not compiler errors   Odds are that if you change the compilation line to be this   gcc info C -lstdc     which makes it link to the standard c   library  then it will work just fine   However  you should just make your life easier and use g       EDIT   Rup says it best in his comment to another answer            gcc will   select the correct back-end compiler   based on file extension  i e  will   compile a  c as C and a  cc as C      and links binaries against just the   standard C and GCC helper libraries by   default regardless of input languages    g   will also select the correct   back-end based on extension except   that I think it compiles all C source   as C   instead  i e  it compiles both    c and  cc as C    and it includes   libstdc   in its link step regardless   of input languages

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By default  gcc selects the language based on the file extension  but you can force gcc to select a different language backend with the -x option thus   gcc -x c     More options are detailed in the gcc man page under  Options controlling the kind of output   See e g  http   linux die net man 1 gcc  search on the page for the text -x language    This facility is very useful in cases where gcc can t guess the language using a file extension  for example if you re generating code and feeding it to gcc via stdin

User · Answer

It worked well for me  Just one line code in cmd   First  confirm that you have installed the gcc  for c  or g    for c    compiler   In cmd for gcc type   gcc --version  in cmd for g   type   g   --version  If it is installed then proceed   Now  compile your  c or  cpp using cmd  for  c syntax   gcc -o exe filename yourfilename c  Example   gcc -o myfile myfile c  Here exe filename  myfile in example  is the name of your  exe file which you want to produce after compilation  Note  i have not put any extension here   And yourfilename c  myfile c in example  is the your source file which has the  c extension   Now go to folder containing your  c file  here you will find a file with  exe extension  Just open it  Hurray    For  cpp syntax   g   -o exe filename yourfilename cpp  After it the process is same as for  c

User · Answer

If I recall correctly  gcc determines the filetype from the suffix   So  make it foo cc and it should work   And  to answer your other question  that is the difference between  gcc  and  g     gcc is a frontend that chooses the correct compiler

User · Answer

use g   instead of gcc

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