bash-4.1$ grep -C3 GC_set_finalizer_notifier config.log
|   return 0;
| }
configure:51263: result: no
configure:51263: checking for GC_set_finalizer_notifier
configure:51263: gcc -o conftest -I/Users/users/sarrvesh/AstroTools/bdwgc/include/ -g -O2 -I/Users/users/sarrvesh/AstroTools/libunistring/include -L/Users/users/sarrvesh/AstroTools/libunistring/lib conftest.c -L/Users/users/sarrvesh/AstroTools/bdwgc/lib/ -lcrypt -lm  >&5
/tmp/cc1HLBl7.o: In function `main':
/Users/users/sarrvesh/AstroTools/guile-2.0.11/conftest.c:878: undefined reference to `GC_set_finalizer_notifier'
collect2: ld returned 1 exit status
configure:51263: $? = 1
configure: failed program was:
--
| #define HAVE_TM_ZONE 1
| #define HAVE_STRUCT_TM_TM_GMTOFF 1
| /* end confdefs.h.  */
| /* Define GC_set_finalizer_notifier to an innocuous variant, in case <limits.h> declares GC_set_finalizer_notifier.
|    For example, HP-UX 11i <limits.h> declares gettimeofday.  */
| #define GC_set_finalizer_notifier innocuous_GC_set_finalizer_notifier
|
| /* System header to define __stub macros and hopefully few prototypes,
|     which can conflict with char GC_set_finalizer_notifier (); below.
|     Prefer <limits.h> to <assert.h> if __STDC__ is defined, since
|     <limits.h> exists even on freestanding compilers.  */
|
--
| # include <assert.h>
| #endif
|
| #undef GC_set_finalizer_notifier
|
| /* Override any GCC internal prototype to avoid an error.
|    Use char because int might match the return type of a GCC
--
| #ifdef __cplusplus
| extern "C"
| #endif
| char GC_set_finalizer_notifier ();
| /* The GNU C library defines this for functions which it implements
|     to always fail with ENOSYS.  Some functions are actually named
|     something starting with __ and the normal name is an alias.  */
| #if defined __stub_GC_set_finalizer_notifier || defined __stub___GC_set_finalizer_notifier
| choke me
| #endif
|
| int
| main ()
| {
| return GC_set_finalizer_notifier ();
|   ;
|   return 0;
| }
--
ac_cv_func_GC_pthread_sigmask=no
ac_cv_func_GC_set_all_interior_pointers=no
ac_cv_func_GC_set_finalize_on_demand=no
ac_cv_func_GC_set_finalizer_notifier=no
ac_cv_func_GC_set_java_finalization=no
ac_cv_func_GC_set_start_callback=no
ac_cv_func__NSGetEnviron=no
bash-4.1$