i can not compile the program.
[root@localhost python-crack-0.5]# ./configure
configure: error: C compiler cannot create executables
[root@localhost python-crack-0.5]#

can u pls tell me what is the problem here?

Is there a configure script in the directory??? Is it chmoded??? Does the source code have a INSTALL or README file. Reading that file might help you compile and install the program.

-Tux,

Edit: Found a thread which has the same problem...looks like you have some gcc stuff missing.

Read the README or INSTALL file first .
Maybe you can find the answer.
In my opinion, the most possible reason is that
your system has no right c compiler which is requested in the configure file or you can't install this software through classical steps (such as ./configure make&make install ) at all.

You look as though you are running as root full time. ./configure and make should be done as the regular user. Make install is done as root.

To get gcc installed on Mandrake:
1) http://easyurpmi.zarb.org and setup access to the software repositories
2) System->Configuration->Packaging->Install Software
3) Type in gcc and click install. Also try typing in whatever you where trying to compile - its a lot easier to install stuff if you stick to the Mandrake packages.

I'm using Ubuntu and I have the same problem. When I try to compile programs I'm getting error Checking for C compiler default output file name... configure: error: C compiler cannot create executables. I have no idea how to tell the compiler the default output file name.

And as I was compiling one program made by my own I got a message

error: stdio: No such file or directory.

It looks like I have to edit some path where GCC is looking header files. But I'm just so newbie that I don't know how to do that.

The ubuntu software install system is Synaptic. Use that to install gcc and gcc-c++ and then see how you go.

I tried to use Synaptic but that did not solved the problem. It looks like I have to edit those header file paths manually but I have no idea how to do that.

Can you post the full error message? What header files are missing?

If you've already got gcc you'll still need to install the -devel packages for whatever programs/libraries the program you're trying to compile is trying to link against.

OK, I installed every gcc-related packages I found, but when I compiled with command

> gcc eka.c -v

I got the following messages

Using built-in specs.
Target: i486-linux-gnu
Configured with: ../src/configure -v --enable-languages=c,c++,java,f95,objc,ada,treelang --prefix=/usr --with-gxx-include-dir=/usr/include/c++/4.0.2 --enable-shared --with-system-zlib --libexecdir=/usr/lib --enable-nls --without-included-gettext --enable-threads=posix --program-suffix=-4.0 --enable-__cxa_atexit --enable-libstdcxx-allocator=mt --enable-clocale=gnu --enable-libstdcxx-debug --enable-java-gc=boehm --enable-java-awt=gtk --enable-gtk-cairo --with-java-home=/usr/lib/jvm/java-1.4.2-gcj-4.0-1.4.2.0/jre --enable-mpfr --disable-werror --enable-checking=release i486-linux-gnu
Thread model: posix
gcc version 4.0.2 20050808 (prerelease) (Ubuntu 4.0.1-4ubuntu9)
/usr/lib/gcc/i486-linux-gnu/4.0.2/cc1 -quiet -v eka.c -quiet -dumpbase eka.c -mtune=i486 -auxbase eka -version -o /tmp/cc5xfHHh.s
ignoring nonexistent directory "/usr/local/include/i486-linux-gnu"
ignoring nonexistent directory "/usr/include/i486-linux-gnu"
#include "..." search starts here:
#include <...> search starts here:
/usr/local/include
/usr/lib/gcc/i486-linux-gnu/4.0.2/include
/usr/include
End of search list.
GNU C version 4.0.2 20050808 (prerelease) (Ubuntu 4.0.1-4ubuntu9) (i486-linux-gnu)
compiled by GNU C version 4.0.2 20050808 (prerelease) (Ubuntu 4.0.1-4ubuntu9).
GGC heuristics: --param ggc-min-expand=46 --param ggc-min-heapsize=31092
eka.c:1:19: error: stdio.h: No such file or directory
eka.c:2:19: error: conio.h: No such file or directory

I think you've got 2 seperate issues here:
Make sure you have the glibc-devel package installed and check that there is a file /usr/include/stdio.h. If the file exists and you still get this error it may be the way you've written the include, my c/c++ is a little rusty but I think it should be conio.h is for an old non-standard Borland-proprietary console library for DOS/Windows. The Linux equivalent is the curses library, and you'll need to rewrite your code to use that if you want the program to work in Linux: http://cboard.cprogramming.com/showthread.php?t=69433

I think this is really a programming question so you'll probably get better help in the programming forum on this site.