Re: [PORTS] Re: 64-bit int (was backend cache...)

At 17:50 +0200 on 17/12/98, Thomas G. Lockhart wrote:


> Yes, it seems that it should be. Please send your src/config.log so we
> can see what it determined. You might also check that the libc used for
> your little test is the same libc used for Postgres linking, just in
> case you are getting a different printf.

Ah, the config.log reveals some interesting stuff...

Don't Postgres sources include stdlib.h? I think there are other tests that
fail because they expect certain symbols to be defined, but don't include
the proper files. For example, the F_SETLK test fails, not because F_SETLK
is missing, but because SEEK_SET is missing...

Also, apparently, one gets a warning if main is not explicitly declared void...

<< Snippet from src/config.log >>

configure:3858: checking whether 'long int' is 64 bits
configure:3898: /l5/lang/SUNWspro/bin/cc -o conftest -Xa -v
-D__sparc__ -D__sun__ -DDISABLE_COMPLEX_MACRO     conftest.c -lgen
-lcrypt -lnsl -lsocket -ldl -lm -ltermcap -lcurses  1>&5
"configure", line 3882: warning: implicitly declaring function to
return int: strcmp()
"configure", line 3894: warning: implicitly declaring function to
return int: exit()
"configure", line 3895: warning: Function has no return statement :
main
configure: failed program was:
#line 3863 "configure"
#include "confdefs.h"
#include <stdio.h>
typedef long int int64;
#define INT64_FORMAT "%ld"

int64 a = 20000001;
int64 b = 40000005;

int does_int64_work()
{
  int64 c,d,e;
  char buf[100];

  if (sizeof(int64) != 8)
    return 0;            /* doesn't look like the right size */

  /* we do perfunctory checks on multiply, divide, sprintf, sscanf */
  c = a * b;
  sprintf(buf, INT64_FORMAT, c);
  if (strcmp(buf, "800000140000005") != 0)
    return 0;            /* either multiply or sprintf is busted */
  if (sscanf(buf, INT64_FORMAT, &d) != 1)
    return 0;
  if (d != c)
    return 0;
  e = d / b;
  if (e != a)
    return 0;
  return 1;
}
main() {
  exit(! does_int64_work());
}
configure:3915: checking whether 'long long int' is 64 bits
configure:3955: /l5/lang/SUNWspro/bin/cc -o conftest -Xa -v
-D__sparc__ -D__sun__ -DDISABLE_COMPLEX_MACRO     conftest.c -lgen
-lcrypt -lnsl -lsocket -ldl -lm -ltermcap -lcurses  1>&5
"configure", line 3939: warning: implicitly declaring function to
return int: strcmp()
"configure", line 3951: warning: implicitly declaring function to
return int: exit()
"configure", line 3952: warning: Function has no return statement :
main

<< End of snippet >>

Herouth

--
Herouth Maoz, Internet developer.
Open University of Israel - Telem project
http://telem.openu.ac.il/~herutma