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#include <stdio.h>
#include <glob.h>
#ifdef F77_DUMMY_MAIN
#  ifdef __cplusplus
     extern "C"
#  endif
   int F77_DUMMY_MAIN() { return 1; }
#endif
int
main ()
{

glob(NULL, GLOB_BRACE|GLOB_NOCHECK|GLOB_QUOTE|GLOB_TILDE|
#ifdef GLOB_MAXPATH
GLOB_MAXPATH
#else
GLOB_LIMIT
#endif
,
NULL, NULL);

  ;
  return 0;
}

according to config.log, this is compiled like this (ok, I stripped some -R):

 gcc  -o conftest -g -O2  -D__NO_STRING_INLINES -I/pdc/mpkg/db/4
.0.14/include -I/pdc/mpkg/flex/2.5.4a/include -I/pdc/mpkg/hesiod/3.0.2/include -
I/pdc/mpkg/krb4/1.3e3/include -I/pdc/mpkg/openssl/0.9.7b/include -I/pdc/mpkg/rea
dline/4.3/include  -L/pdc/mpkg/db/4.0.14/lib -L/pdc/mpkg/flex/2.5.4a/lib 
-L/pdc/mpkg/heimdal/0.6/lib -L/pdc/mpkg/hesiod/3.0.2/lib -L/pdc/mpkg/k
rb4/1.3e3/lib -L/pdc/mpkg/ncurses/5.3/lib -L/pdc/mpkg/openssl/0.9.7b/lib -L/pdc/
mpkg/readline/4.3/lib -L/pdc/mpkg/tcltk/8.4.1/lib -L/pdc/mpkg/zlib/1.1.4/lib con
ftest.c -lresolv 

As I have a glob.h in /pdc/mpkg/krb4/1.3e3/include it compiles nicely
with that prototype and then conftest is linked with glob() from libc.

configure:16171: checking for working glob
configure:16226: result: yes

Which is not true because the combination of the glob_t prototype from
krb4 libroken and the glob() from glibc2.2 interprets the filled in
glob_t wrong.

Glibc2.2:

typedef struct {
        size_t gl_pathc;    /* Count of paths matched so far  */
        char **gl_pathv;    /* List of matched pathnames.  */
        size_t gl_offs;     /* Slots to reserve in `gl_pathv'.  */
	(....)
} glob_t;

Krb4 libroken:

typedef struct {
        int gl_pathc;           /* Count of total paths so far. */
        int gl_matchc;          /* Count of paths matching pattern. */
        int gl_offs;            /* Reserved at beginning of gl_pathv. */
        int gl_flags;           /* Copy of flags parameter to glob. */
        char **gl_pathv;        /* List of paths matching pattern. */
                                /* Copy of errfunc parameter to glob. */
        int (*gl_errfunc) (const char *, int);
	(....)
} glob_t;

And now the question: Anyone who has a configure test that really tests if glob
works instead of AC_TRY_LINK which apparently is not good enough?

Harald.