diff --git a/Makefile b/Makefile
index 2c67d4a06..35545eb06 100644
--- a/Makefile
+++ b/Makefile
@@ -1,65 +1,87 @@
-SRCS = \
-	shell/hush.c \
+# The *_SRC variables are used to define segments; see the "%.a" recipe.
+# shell/hush.c is divided into segments as specified within the file itself.
+
+MAIN_SRC = shell/hush.c
+
+SHELL_OTHER_SRC = \
 	shell/match.c \
 	shell/math.c \
 	shell/random.c \
 	shell/shell.common.c \
-	shell/glob.c \
+	shell/glob.c
+
+COREUTILS_SRC = \
 	coreutils/echo.c \
 	coreutils/test.c \
-	coreutils/test.ptr.hack.c \
-	libbb/xfuncs.printf.c \
-	libbb/xfuncs.c \
-	libbb/xgetcwd.c \
-	libbb/getopt32.c \
-	libbb/perror.msg.c \
-	libbb/xatonum.c \
-	libbb/signal.names.c \
-	libbb/ptrtoglobals.c \
-	libbb/error.retval.c \
-	libbb/xfunc.die.c \
-	libbb/safe.strncpy.c \
+	coreutils/test.ptr.hack.c
+	
+LIBBB_A_SRC = \
 	libbb/lineedit.c \
 	libbb/lineedptrhack.c \
-	libbb/platform.c \
+	libbb/appletlib.c \
+	libbb/getopt32.c \
+	libbb/error.retval.c \
 	libbb/endofname.c \
-	libbb/signals.c \
-	libbb/skip.whitespc.c \
-	libbb/wfopen.c \
-	libbb/verror.msg.c \
 	libbb/bb.strtonum.c \
-	libbb/time.c \
-	libbb/printable.str.c \
 	libbb/full.write.c \
 	libbb/bb.qsort.c \
-	libbb/xrealloc.vec.c \
 	libbb/copyfd.c \
-	libbb/read.key.c \
-	libbb/unicode.c \
-	libbb/safe.write.c \
-	libbb/read.c \
-	libbb/s.gethostname.c \
 	libbb/get.line.c \
 	libbb/conc.pathfile.c \
 	libbb/last.char.is.c \
-	libbb/safe.poll.c \
-	libbb/escape.seq.c \
 	libbb/cmp.str.array.c \
 	libbb/llist.c \
-	libbb/parse.mode.c \
+	libbb/escape.seq.c \
 	libbb/messages.c \
-	libbb/appletlib.c \
 	libbb/bb.basename.c \
-	libbb/mempcpy.c \
-	libbb/vfork.and.run.c \
-	libbb/poll.c
-OBJS = $(SRCS:.c=.o)
-ROOTS = $(SRCS:.c=.root)
+	libbb/mempcpy.c 
+
+LIBBB_B_SRC = \
+	libbb/perror.msg.c \
+	libbb/signal.names.c \
+	libbb/ptrtoglobals.c \
+	libbb/safe.strncpy.c \
+	libbb/platform.c \
+	libbb/signals.c \
+	libbb/printable.str.c \
+	libbb/read.key.c \
+	libbb/safe.write.c \
+	libbb/read.c \
+	libbb/s.gethostname.c \
+	libbb/safe.poll.c \
+	libbb/parse.mode.c \
+	libbb/poll.c \
+	libbb/xfuncs.printf.c \
+	libbb/xfuncs.c \
+	libbb/xgetcwd.c \
+	libbb/xatonum.c \
+	libbb/xfunc.die.c \
+	libbb/skip.whitespc.c \
+	libbb/wfopen.c \
+	libbb/verror.msg.c \
+	libbb/time.c \
+	libbb/xrealloc.vec.c \
+	libbb/unicode.c \
+	libbb/vfork.and.run.c 
+	
+SRCS = $(MAIN_SRC) $(SHELL_OTHER_SRC) $(COREUTILS_SRC) $(LIBBB_A_SRC) $(LIBBB_B_SRC)
+OBJS = $(SRCS:.c=.a)
+ROOT = $(MAIN_SRC:.c=.root)
 
 INCLUDES = -I include -I shell -I libbb
 DEFINES = -Dhush_main=main -DNDEBUG
 
-OCC_FLAGS = -i -w -a0
+# Hack to effectively disable close_on_exec_on method for now.
+# This will cause us to leak file descriptors.  TODO: Fix.
+DEFINES += -DF_SETFD=-1 -DFD_CLOEXEC=-1
+
+# For correct handling of varargs methods and fork, we need
+# optimize bit 3 set (no stack repair code).
+# Optimize bit 6 breaks some standard-compliant varargs code,
+# and bits 0, 4, and 5 have known bugs.  Disable for now.
+OCC_FLAGS = -i -w -a0 -O8
+STACKSIZE = 20480
+
 # Add $(OCC_FLAGS) to CFLAGS on dmake
 CFLAGS = $(null, $(OCC_FLAGS))
 
@@ -68,9 +90,14 @@ PROG = hush
 $(PROG): $(OBJS)
 	$(CC) $(OBJS) -o $@
 
-%.o: %.c
-	$(CC) $(INCLUDES) $(DEFINES) $(CFLAGS) -c $< -o $@
+%.a: %.c
+	$(CC) $(INCLUDES) $(DEFINES) $(CFLAGS) -c $< -o $@ \
+		$(eq,$<,$(MAIN_SRC) -s$(STACKSIZE) -r) \
+		$(!eq,$(SHELL_OTHER_SRC:s/$<//),$(SHELL_OTHER_SRC) -SSHELLOTHER) \
+		$(!eq,$(COREUTILS_SRC:s/$<//),$(COREUTILS_SRC) -SCOREUTILS_) \
+		$(!eq,$(LIBBB_A_SRC:s/$<//),$(LIBBB_A_SRC) -SLIBBB_A___) \
+		$(!eq,$(LIBBB_B_SRC:s/$<//),$(LIBBB_B_SRC) -SLIBBB_B___) 
 
 .PHONY: clean
 clean:
-	$(RM) $(OBJS) $(ROOTS) $(PROG)
+	$(RM) $(OBJS) $(ROOT) $(PROG)
diff --git a/Makefile.gmake b/Makefile.gmake
new file mode 100644
index 000000000..c162ec754
--- /dev/null
+++ b/Makefile.gmake
@@ -0,0 +1,75 @@
+SRCS = \
+	shell/hush.c \
+	shell/match.c \
+	shell/math.c \
+	shell/random.c \
+	shell/shell.common.c \
+	shell/glob.c \
+	coreutils/echo.c \
+	coreutils/test.c \
+	coreutils/test.ptr.hack.c \
+	libbb/xfuncs.printf.c \
+	libbb/xfuncs.c \
+	libbb/xgetcwd.c \
+	libbb/getopt32.c \
+	libbb/perror.msg.c \
+	libbb/xatonum.c \
+	libbb/signal.names.c \
+	libbb/ptrtoglobals.c \
+	libbb/error.retval.c \
+	libbb/xfunc.die.c \
+	libbb/safe.strncpy.c \
+	libbb/lineedit.c \
+	libbb/lineedptrhack.c \
+	libbb/platform.c \
+	libbb/endofname.c \
+	libbb/signals.c \
+	libbb/skip.whitespc.c \
+	libbb/wfopen.c \
+	libbb/verror.msg.c \
+	libbb/bb.strtonum.c \
+	libbb/time.c \
+	libbb/printable.str.c \
+	libbb/full.write.c \
+	libbb/bb.qsort.c \
+	libbb/xrealloc.vec.c \
+	libbb/copyfd.c \
+	libbb/read.key.c \
+	libbb/unicode.c \
+	libbb/safe.write.c \
+	libbb/read.c \
+	libbb/s.gethostname.c \
+	libbb/get.line.c \
+	libbb/conc.pathfile.c \
+	libbb/last.char.is.c \
+	libbb/safe.poll.c \
+	libbb/escape.seq.c \
+	libbb/cmp.str.array.c \
+	libbb/llist.c \
+	libbb/parse.mode.c \
+	libbb/messages.c \
+	libbb/appletlib.c \
+	libbb/bb.basename.c \
+	libbb/mempcpy.c \
+	libbb/vfork.and.run.c \
+	libbb/poll.c
+OBJS = $(SRCS:.c=.o)
+
+INCLUDES = -I include -I shell -I libbb
+DEFINES = -Dhush_main=main -DNDEBUG
+
+OCC_FLAGS = -i -w -a0
+# Add $(OCC_FLAGS) to CFLAGS on dmake
+CFLAGS = $(null, $(OCC_FLAGS))
+
+PROG = hush
+
+$(PROG): $(OBJS)
+	$(CC) $(OBJS) -o $@
+
+%.o: %.c
+	$(CC) $(INCLUDES) $(DEFINES) $(CFLAGS) -c $< -o $@
+
+.PHONY: clean
+clean:
+	$(RM) $(OBJS) $(PROG)
diff --git a/build.gcc b/build.gcc
index 26fba9a0d..312038941 100755
--- a/build.gcc
+++ b/build.gcc
@@ -1,4 +1,4 @@
 #!/bin/sh
 
 # Make with appropriate flags for gcc or clang on modern *nix systems
-make CFLAGS="-std=c89 -funsigned-char -Wall -Wno-format-security -Wno-comment"
+make -f Makefile.gmake CFLAGS="-std=c89 -funsigned-char -Wall -Wno-format-security -Wno-comment"
diff --git a/shell/hush.c b/shell/hush.c
index 55303f8f8..f1b7b2d0a 100644
--- a/shell/hush.c
+++ b/shell/hush.c
@@ -1063,6 +1063,10 @@ static void real_debug_printf(const char *fmt, ...) {
 # define DEBUG_CLEAN 0
 #endif
 
+#ifdef __ORCAC__
+segment "HUSH_A____";
+#endif
+
 #if DEBUG_EXPAND
 static void debug_print_strings(const char *prefix, char **vv)
 {
@@ -5628,6 +5632,10 @@ static char **expand_assignments(char **argv, int count)
 }
 
 
+#ifdef __ORCAC__
+segment "HUSH_B____";
+#endif
+
 static void switch_off_special_sigs(unsigned mask)
 {
 	unsigned sig = 0;