Re: HelloWorld.c CRASHES when moved from FC6 to FC3!!

[troubled_gcc_user]

On Thu, 08 Feb 2007 21:35:37 +0100, Robert Heller <heller@deepsoft.com> wrote:
> At Thu, 08 Feb 2007 12:53:54 -0600 troubled_gcc_user@aol.com wrote:
>
>> 
>> I wrote this little program hello.c and compiled it on Fedora Core
>> 6. It gives a Floating Point Error on Fedora Core 3. What is going on
>> here????????
>> 
>> My problem, obviously, lies with a larger app that I compile on FC6
>> and want to run on FC3, this example is just an illustration of the
>> problem. I am desperate. I need to solve this shit. 
>> 
>> See output here:
>> 
>> FC6:~/tmp ==>cat hello.c
>> #include <stdio.h>
>> #include <stdlib.h>
>> 
>> int main( int argtc, char * argv[] ) {
>> 
>>   printf( "Hello\n" );
>> 
>>   exit( 0 );
>> }
>> FC6:~/tmp ==>gcc -o hello hello.c 
>> FC6:~/tmp ==>./hello 
>> Hello
>> 
>> @@@@@ Then I move it to a Fedora Core 3 machine and run it:
>> 
>> FC3: ==>./hello 
>> Floating point exception (core dumped)
>> 
>> FC3: ==>strace ./hello 
>> execve("./hello", ["./hello"], [/* 63 vars */]) = 0
>> brk(0)                                  = 0x85ff000
>> old_mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS,
>> -1, 0) = 0xb7f4b000
>> +++ killed by SIGFPE (core dumped) +++
>> Process 11101 detached
>
> I'm guessing you did not re-compile for FC3? 

Correct.

> Most likely the Glibc is different between FC6 and FC3 and the FC6
> build is not (by default) downward compatible.  What happens when
> you re-compile it *under* FC3?

I am sure that it will work fine -- but our build boxes ARE FC6 and
out production boxes ARE FC3. 

I need to find a solution to building downward compatible apps under
FC6 that would run on FC3. 

I really need your help here.

Thanks

tgu