As above, a noddy patch - in-line:

+2002-08-08  Michael Meeks  <michael@ximian.com>
+
+       * memintercept.c: switch to gthread for Solaris.
+
 Tue Aug  6 21:14:00 2002  Owen Taylor  <otaylor@redhat.com>
 
        * memintercept.c (debug): Add a mini-printf implementation, use
Index: memintercept.c
===================================================================
RCS file: /cvs/gnome/memprof/memintercept.c,v
retrieving revision 1.15
diff -u -p -u -r1.15 memintercept.c
--- memintercept.c      8 Aug 2002 01:32:55 -0000       1.15
+++ memintercept.c      8 Aug 2002 10:41:57 -0000
@@ -33,7 +33,7 @@
 #include <stdarg.h>
 #include "memintercept.h"
 
-#include <pthread.h>
+#include <glib/gthread.h>
 
 #include <sys/socket.h>
 #include <sys/types.h>
@@ -59,7 +59,7 @@ static void (*old__exit) (int status);
 
 #define MAX_THREADS 128
 
-static pthread_mutex_t malloc_mutex = PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP;
+static GStaticRecMutex malloc_mutex = G_STATIC_REC_MUTEX_INIT;
 static int tracing = 1;
 
 static int pids[MAX_THREADS];
@@ -74,8 +74,8 @@ int starter_last = 0;
 
 #undef ENABLE_DEBUG
 
-#define MI_LOCK() pthread_mutex_lock (&malloc_mutex);
-#define MI_UNLOCK() pthread_mutex_unlock (&malloc_mutex);
+#define MI_LOCK() g_static_rec_mutex_lock (&malloc_mutex);
+#define MI_UNLOCK() g_static_rec_mutex_unlock (&malloc_mutex);
 
 static void
 abort_unitialized (const char *call)