What is "-fno-exceptions" ???

[Anonymous]

What is "-fno-exceptions" ???

[Nobody/Anonymous]

The "-fexceptions" switch enables exception handling in the GCC compiler by default. According to the GCC compiler documentation, this can produce significant data size overhead. The "-fno-exceptions" switch disables exception handling.

Wayne

[Anonymous]

hmm thanks for the explanation but i mean i have a code which is:

#include <stdio.h>
#include <conio.h>
#define CR 13       /* this defines CR to be 13 */
#define LF 10       /* this defines LF to be 10 */

int main()
{
int c;

   printf("Input any characters, hit X to stop.\n");

   do
   {
      c = _getch();                  /* get a character            */
      putchar(c);                    /* display the hit key        */
      if (c == CR) putchar(LF);      /* if it is a carriage return */
                                     /*  put out a linefeed too    */
   } while (c != 'X');

   printf("\nEnd of program.\n");

   return 0;
}

/* Result of execution

Input any characters, hit X to stop.

(The output depends on what characters you enter.)

End of program.

*/

so it gaves an error which is:

[Linker error] undefined reference to `__gxx_personality_v0'

so i change the value to Yes for "support all Ansi C standard programs...

then the error changes to:

C:\C++\003\BETTERIN.C
[Warning] In function `int main()':

15 C:\C++\003\BETTERIN.C
`_getch' undeclared (first use this function)

[Build Error] (Each undeclared identifier is reported only once for

so i opened the ANSI option and make an improvement but couldn't make the "-fno-exceptions" ok, as Hank said in http://sourceforge.net/forum/message.php?msg_id=1838752

??? So what is the problem about the exceptions???

[Nobody/Anonymous]

I think there is another issue.  Your code compiles here with no errors:

Executing  gcc.exe...
gcc.exe "C:\My Documents\testit3.c" -o "C:\My Documents\testit3.exe"   -lgsl -g3 -g3  -I"C:\DEV-CPP\include"   -L"C:\DEV-CPP\lib" -L"c:\dev-cpp\include"
Execution terminated
Compilation successful

It compiles as either a C++ or a C program with no errors.  Notive that my compile options do not involve "-fno-exceptions".  (It compiles if I turn it on also)

I just copied your code, created a new source file, pasted and compiled.

Wayne

[Nobody/Anonymous]

Excuse my butting in, but:
It seems I've had similar experiences that were caused by my file extension of the source file.

Is your source file somethinglikethis.C or somethinglikethis.c?

The compiler only recognizes somethinglikethis.c as a native C program. Otherwize g++ is invoked.

Hope it helps.

/Lars.

[Nobody/Anonymous]

Thanks Lars, I am not sure he is going to believe me that the road he was looking on was not the right road.

I was able to compile and run his code with both gcc and g++ by the way.  Kinda makes sense since it is written as essentially C code.

I actually ran into that error the other day through another path.  I had loaded an example project and run it.  I then sorta lost track of what I was doing, and did a reload of another program, while the project was still there.  When I tried to compile the stand alone code, I got the error....which was the first time I had seen it.

Wayne