I am trying to compile a simple c program on Redhat v9.2.

--- program code ----
#include < stdio.h >

main()
{
char s[4];
int i;
char *s2;

strcpy(s, "Jim");
i = (int) s;
printf("i = %ld (0x%lx)\n", i, i);
printf("s = %ld (0x%lx)\n", s, s);

i++;
s2 = (char *) i;
printf("s = 0x%lx. s2 = 0x%lx, i = 0x%lx, s[0] = %c, s[1] = %c, *s2 = %c\n",
s, s2, i, s[0], s[1], *s2);
}

--- end program code ----


I execute the compiler

$root: /u/c>gcc -I/usr/include -v -o p8 p8.c

--- gcc response ---
Using built-in specs.
Target: i386-redhat-linux
Configured with: ../configure --prefix=/usr --mandir=/usr/share/man --infodir=/usr/share/info --enable-shared --enable-threads=posix --enable-checking=release --with-system-zlib --enable-__cxa_atexit --disable-libunwind-exceptions --enable-libgcj-multifile --enable-languages=c,c++,objc,obj-c++,java,fortran,ada --enable-java-awt=gtk --disable-dssi --enable-plugin --with-java-home=/usr/lib/jvm/java-1.4.2-gcj-1.4.2.0/jre --with-cpu=generic --host=i386-redhat-linux
Thread model: posix
gcc version 4.1.2 20070626 (Red Hat 4.1.2-14)
/usr/libexec/gcc/i386-redhat-linux/4.1.2/cc1 -quiet -v -I/usr/include p8.c -quiet -dumpbase p8.c -mtune=generic -auxbase p8 -version -o /tmp/cctWroQw.s
ignoring nonexistent directory "/usr/lib/gcc/i386-redhat-linux/4.1.2/../../../../i386-redhat-linux/include"
ignoring duplicate directory "/usr/include"
as it is a non-system directory that duplicates a system directory
#include "..." search starts here:
#include <...> search starts here:
/usr/local/include
/usr/lib/gcc/i386-redhat-linux/4.1.2/include
/usr/include
End of search list.
GNU C version 4.1.2 20070626 (Red Hat 4.1.2-14) (i386-redhat-linux)
compiled by GNU C version 4.1.2 20070626 (Red Hat 4.1.2-14).
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: 6f8a93af44427a05901e7b3a98a7b357
p8.c:1:21: error: stdio.h : No such file or directory
p8.c: In function âmainâ:
p8.c:9: warning: incompatible implicit declaration of built-in function âstrcpyâ
p8.c:11: warning: incompatible implicit declaration of built-in function âprintfâ
--- end error response from gcc ---

I have verified that the file exists

root: /usr/include>ls -l stdio.h
-rw-r--r-- 1 root root 28341 Oct 15 2007 stdio.h
root: /usr/include>

Can anyone explain why this will not compile?

why did you put spaces around "stdio.h"?????

It should look like this:

That solved the problem with finding the headers, thanks. I did have one additional problem, the strcpy command was not found in stdio.h and I had to add string.h.

Please post code and compiler output in [code] tags to aid readability.

I notice that you are building these test programs as the root user. This is not good practice - you should use a non-privileged user account for all activities which do not require root access (i.e. all non-admin activities).

That's because it belongs in <string.h>.
ta0kira