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compiling with -DSCM_DEBUG=1

From: Ken Raeburn
Subject: compiling with -DSCM_DEBUG=1
Date: Wed, 26 Aug 2009 22:06:39 -0400

__scm.h suggests defining SCM_DEBUG this as a way of turning on all debugging options, so I tried adding -DSCM_DEBUG=1 to CPPFLAGS on the configure command line, using the latest git version (3bcf189). But the test programs in the tree don't build on my Mac, because scm_i_expensive_validation_check isn't exported from the library. The patch below seems to fix it.

Then -- both on the Mac and on GNU/Linux (RHEL4) -- compiling occam- channel.scm fails with:

GUILE_AUTO_COMPILE=0 ../meta/uninstalled-env guile-tools compile -o "ice-9/occam-channel.go" "../../module/ice-9/occam-channel.scm" Non-pair accessed with SCM_C[AD]R: `#<procedure #f (#{class\ 1972}# . #{initargs\ 1971}#)>'
make[2]: *** [ice-9/occam-channel.go] Abort trap

--- a/libguile/gc.h
+++ b/libguile/gc.h
@@ -248,7 +248,7 @@ SCM_INTERNAL void scm_i_ensure_marking(void);
 SCM_API int scm_debug_cell_accesses_p;
 SCM_API int scm_expensive_debug_cell_accesses_p;
 SCM_API int scm_debug_cells_gc_interval ;
-void scm_i_expensive_validation_check (SCM cell);
+SCM_API void scm_i_expensive_validation_check (SCM cell);

 SCM_INTERNAL scm_i_pthread_mutex_t scm_i_gc_admin_mutex;

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