linux 跨版本问题

 1 //redhattest.c
 2  #include <stdio.h>
 3  int main()
 4 {
 5         int a=0;
 6                                                                                                                                 
 7         printf ("this is compiled in Red Hat, %d\n",a);
 8                                                                                                                                 
 9         return 0;
10 }
11

编译完之后放到centos上运行可以正常运行

Red Hat版本信息
Red Hat Enterprise Linux AS release 3 (Taroon Update 5)
Kernel \r on an \m

Linux version 2.4.21-32.EL ([email protected]) (gcc version 3.2.3 20030502 (Red Hat Linux 3.2.3-52)) #1 Fri Apr 15 21:17:56 EDT 2005
2.4.21-32.EL
gcc版本信息
gcc (GCC) 3.2.3 20030502 (Red Hat Linux 3.2.3-52)
Copyright (C) 2002 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

 1 //centostest.c
 2  #include <stdio.h>
 3 int main()
 4 {
 5         int a=0;
 6 
 7         printf ("this is compiled in Centos, %d\n",a);
 8 
 9         return 0;
10 }
11 

CentOS release 5.5 (Final)
Kernel \r on an \m

Linux version 2.4.21-32.EL ([email protected]) (gcc version 3.2.3 20030502 (Red Hat Linux 3.2.3-52)) #1 Fri Apr 15 21:17:56 EDT 2005

2.6.18-194.8.1.el5
gcc版本信息

gcc (GCC) 4.1.2 20080704 (Red Hat 4.1.2-48)
Copyright (C) 2006 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.