| ASSERT(3) | Library Functions Manual | ASSERT(3) | 
assert —
#include <assert.h>
assert(expression);
assert() macro tests the given
  expression and if it is false, the calling process is
  terminated. A diagnostic message, consisting of the text of the expression,
  the name of the source file, the line number and the enclosing function, is
  written to stderr and the
  abort(3) function is called,
  effectively terminating the program.
If expression is true, the
    assert() macro does nothing.
The assert() macro may be removed at
    compile time with the cc(1) option
    -DNDEBUG.
"assertion \"%s\" failed: file \"%s\", line %d, function \"%s\"\n", \ "expression", __FILE__, __LINE__, __func__);
assert() macro conforms to ISO/IEC
  9899:1999 (“ISO C99”).
assert macro appeared in
  Version 7 AT&T UNIX.
Information on the name of the enclosing function appeared in ISO/IEC 9899:1999 (“ISO C99”).
| June 1, 2016 | NetBSD 9.3 |