--- emacs-4188e3cc2bc69e75d4387b369e72e89fecc46a86/configure.ac
+++ emacs/configure.ac
@@ -2092,7 +2092,7 @@
 
 system_malloc=$emacs_cv_sanitize_address
 
-hybrid_malloc=
+hybrid_malloc=yes
 
 case "$opsys" in
   ## darwin ld insists on the use of malloc routines in the System framework.
--- emacs-4188e3cc2bc69e75d4387b369e72e89fecc46a86/src/Makefile.in
+++ emacs/src/Makefile.in
@@ -373,6 +373,7 @@
 	region-cache.o sound.o atimer.o \
 	doprnt.o intervals.o textprop.o composite.o xml.o $(NOTIFY_OBJ) \
 	profiler.o decompress.o \
+	sheap.o \
 	$(MSDOS_OBJ) $(MSDOS_X_OBJ) $(NS_OBJ) $(CYGWIN_OBJ) $(FONT_OBJ) \
 	$(W32_OBJ) $(WINDOW_SYSTEM_OBJ) $(XGSELOBJ)
 obj = $(base_obj) $(NS_OBJC_OBJ)
--- emacs-4188e3cc2bc69e75d4387b369e72e89fecc46a86/src/gmalloc.c
+++ emacs/src/gmalloc.c
@@ -72,7 +72,7 @@
 #define free gfree
 #endif  /* HYBRID_MALLOC */
 
-#ifdef CYGWIN
+//#ifdef CYGWIN
 extern void *bss_sbrk (ptrdiff_t size);
 extern int bss_sbrk_did_unexec;
 extern char bss_sbrk_buffer[];
@@ -80,7 +80,7 @@
 #define DUMPED bss_sbrk_did_unexec
 #define ALLOCATED_BEFORE_DUMPING(P) \
   ((P) < bss_sbrk_buffer_end && (P) >= (void *) bss_sbrk_buffer)
-#endif
+//#endif
 
 #ifdef	__cplusplus
 extern "C"
@@ -1525,16 +1525,19 @@
 __default_morecore (ptrdiff_t increment)
 {
   void *result;
-#if defined (CYGWIN)
+//#if defined (CYGWIN)
   if (!DUMPED)
     {
       return bss_sbrk (increment);
     }
-#endif
+//#endif
+#if 0
   result = (void *) __sbrk (increment);
   if (result == (void *) -1)
     return NULL;
   return result;
+#endif
+  return NULL;
 }
 /* Copyright (C) 1991, 92, 93, 94, 95, 96 Free Software Foundation, Inc.
 
--- emacs-4188e3cc2bc69e75d4387b369e72e89fecc46a86/src/print.c
+++ emacs/src/print.c
@@ -755,7 +755,7 @@
   print_output_debug_flag = x;
 }
 
-#if defined (GNU_LINUX)
+#if defined (GNU_LINUX) && defined (__GLIBC__)
 
 /* This functionality is not vitally important in general, so we rely on
    non-portable ability to use stderr as lvalue.  */
--- emacs-4188e3cc2bc69e75d4387b369e72e89fecc46a86/src/unexelf.c
+++ emacs/src/unexelf.c
@@ -632,6 +632,9 @@
   off_t new_file_size;
   void *new_break;
 
+  extern int bss_sbrk_did_unexec;
+  bss_sbrk_did_unexec = 1;
+
   /* Pointers to the base of the image of the two files.  */
   caddr_t old_base, new_base;