isinfo

[hiroshi.fujishima@gmail.com]

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Hi,

Why does the compilation of b.c fail, while that of a.c succeeds?

% gcc a.c
% gcc b.c
Undefined			first referenced
 symbol  			    in file
isinf                               /tmp/ccSOxuGb.o
ld: fatal: Symbol referencing errors. No output written to a.out
collect2: ld returned 1 exit status

Here is my enviroment:

% gcc -v
Using built-in specs.
Target: sparc-sun-solaris2.9
Configured with: ../gcc/configure --disable-nls --with-gmp=/usr/local --with-mpfr=/usr/local
Thread model: posix
gcc version 4.0.2 20050707 (prerelease)


[-- Attachment #2: a.c --]
[-- Type: application/octet-stream, Size: 63 bytes --]

int
main (void)
{
  double f = 0.0;
  isinf (f);
  return 0;
}

[-- Attachment #3: b.c --]
[-- Type: application/octet-stream, Size: 238 bytes --]

#include <stdio.h>

int
main (void)
{
  double f = 0.0;
  if (!isinf (f))
    {
      printf ("not isinf(oo) ... ");
      return 1;
    }
  if (!isinf (-f))
    {
      printf ("not isinf(-oo) ... ");
      return 1;
    }
  return 0;
}

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-- 
Hiroshi Fujishima