[PATCH] stubdom: make the build more generic

[Samuel Thibault <samuel.thibault@eu.citrix.com>]

stubdom: make the build more generic by moving as many stubdom parts
into stubdom/ as possible.  That also permits to build all of
ioemu, c and caml stubdoms at the same time.

Signed-off-by: Samuel Thibault <samuel.thibault@eu.citrix.com>

diff -r 2141ac752316 extras/mini-os/Config.mk
--- a/extras/mini-os/Config.mk	Fri May 23 15:43:32 2008 +0100
+++ b/extras/mini-os/Config.mk	Tue May 27 16:15:01 2008 +0100
@@ -55,11 +55,3 @@
 DEF_CPPFLAGS += -I$(LWIPDIR)/src/include
 DEF_CPPFLAGS += -I$(LWIPDIR)/src/include/ipv4
 endif
-
-ifneq ($(QEMUDIR),)
-qemu=y
-endif
-
-ifneq ($(CAMLDIR),)
-caml=y
-endif
--- a/extras/mini-os/Makefile	Fri May 23 15:43:32 2008 +0100
+++ b/extras/mini-os/Makefile	Tue May 27 16:15:01 2008 +0100
@@ -73,44 +73,25 @@
 OBJS += lwip.a
 endif
 
-OBJS := $(filter-out lwip%.o $(LWO), $(OBJS))
-
-ifeq ($(caml),y)
-CAMLLIB = $(shell ocamlc -where)
-APP_OBJS += main-caml.o
-APP_OBJS += $(CAMLDIR)/caml.o
-APP_OBJS += $(CAMLLIB)/libasmrun.a
-CFLAGS += -I$(CAMLLIB)
-APP_LDLIBS += -lm
-endif
-OBJS := $(filter-out main-caml.o, $(OBJS))
-
-ifeq ($(qemu),y)
-APP_OBJS += $(QEMUDIR)/i386-dm-stubdom/qemu.a $(QEMUDIR)/i386-dm-stubdom/libqemu.a
-CFLAGS += -DCONFIG_QEMU
-endif
-
-ifneq ($(CDIR),)
-APP_OBJS += $(CDIR)/main.a
-APP_LDLIBS += 
-endif
+OBJS := $(filter-out main.o lwip%.o $(LWO), $(OBJS))
 
 ifeq ($(libc),y)
 APP_LDLIBS += -L$(XEN_ROOT)/stubdom/libxc -whole-archive -lxenguest -lxenctrl -no-whole-archive
 APP_LDLIBS += -lpci
 APP_LDLIBS += -lz
+APP_LDLIBS += -lm
 LDLIBS += -lc
 endif
 
-ifneq ($(caml)-$(qemu)-$(CDIR)-$(lwip),---y)
+ifneq ($(APP_OBJS)-$(lwip),-y)
 OBJS := $(filter-out daytime.o, $(OBJS))
 endif
 
-app.o: $(APP_OBJS) app.lds
-	$(LD) -r -d $(LDFLAGS) $^ $(APP_LDLIBS) --undefined main -o $@
+$(TARGET)_app.o: $(APP_OBJS) app.lds
+	$(LD) -r -d $(LDFLAGS) $^ $(APP_LDLIBS) --undefined app_main -o $@
 
-$(TARGET): links $(OBJS) app.o arch_lib
-	$(LD) -r $(LDFLAGS) $(HEAD_OBJ) app.o $(OBJS) $(LDARCHLIB) $(LDLIBS) -o $@.o
+$(TARGET): links $(OBJS) $(TARGET)_app.o arch_lib
+	$(LD) -r $(LDFLAGS) $(HEAD_OBJ) $(TARGET)_app.o $(OBJS) $(LDARCHLIB) $(LDLIBS) -o $@.o
 	$(OBJCOPY) -w -G $(GLOBAL_PREFIX)* -G _start $@.o $@.o
 	$(LD) $(LDFLAGS) $(LDFLAGS_FINAL) $@.o $(EXTRA_OBJS) -o $@
 	gzip -f -9 -c $@ >$@.gz
--- a/extras/mini-os/main-caml.c	Fri May 23 15:43:32 2008 +0100
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,42 +0,0 @@
-/*
- * Caml bootstrap
- *
- * Samuel Thibault <Samuel.Thibault@eu.citrix.net>, January 2008
- */
-
-#include <stdio.h>
-#include <errno.h>
-
-#include <caml/mlvalues.h>
-#include <caml/callback.h>
-#include <unistd.h>
-
-/* Ugly binary compatibility with Linux */
-FILE *_stderr asm("stderr");
-int *__errno_location;
-/* Will probably break everything, probably need to fetch from glibc */
-void *__ctype_b_loc;
-
-int main(int argc, char *argv[], char *envp[])
-{
-    value *val;
-
-    /* Get current thread's value */
-    _stderr = stderr;
-    __errno_location = &errno;
-
-    printf("starting caml\n");
-
-    /* Wait before things might hang up */
-    sleep(1);
-
-    caml_startup(argv);
-    val = caml_named_value("main");
-    if (!val) {
-        printf("Couldn't find Caml main");
-        return 1;
-    }
-    caml_callback(*val, Val_int(0));
-    printf("callback returned\n");
-    return 0;
-}
--- a/extras/mini-os/main.c	Fri May 23 15:43:32 2008 +0100
+++ b/extras/mini-os/main.c	Tue May 27 16:15:01 2008 +0100
@@ -4,7 +4,6 @@
  * Samuel Thibault <Samuel.Thibault@eu.citrix.net>, October 2007
  */
 
-#ifdef HAVE_LIBC
 #include <os.h>
 #include <sched.h>
 #include <console.h>
@@ -180,4 +179,3 @@
     main_thread = create_thread("main", call_main, si);
     return 0;
 }
-#endif
--- a/stubdom/Makefile	Fri May 23 15:43:32 2008 +0100
+++ b/stubdom/Makefile	Tue May 27 16:15:01 2008 +0100
@@ -38,7 +38,7 @@
 export PATH:=$(CROSS_PREFIX)/bin:$(PATH)
 
 .PHONY: all
-all: qemu-stubdom
+all: ioemu-stubdom c-stubdom
 
 ################
 # Cross-binutils
@@ -175,6 +175,7 @@
 	  ([ ! -h config-host.h ] || rm -f config-host.h) && \
 	  ([ ! -h config-host.mak ] || rm -f config-host.mak) )
 	[ -h mini-os ] || ln -sf ../extras/mini-os .
+	[ -h mini-os/include/xen ] || ln -sf ../../../xen/include/public mini-os/include/xen
 
 #######
 # libxc
@@ -199,40 +200,41 @@
 ######
 
 .PHONY: caml
-caml:
-	$(MAKE) -C $@
+caml: mk-symlinks
+	$(MAKE) -C $@ LWIPDIR=$(CURDIR)/lwip-cvs 
 
 ###
 # C
 ###
 
 .PHONY: c
-c:
-	$(MAKE) -C $@
+c: mk-symlinks
+	$(MAKE) -C $@ LWIPDIR=$(CURDIR)/lwip-cvs 
 
 ########
 # minios
 ########
 
-.PHONY: qemu-stubdom
-qemu-stubdom: mk-symlinks lwip-cvs libxc ioemu
-	$(MAKE) -C mini-os LWIPDIR=$(CURDIR)/lwip-cvs QEMUDIR=$(CURDIR)/ioemu
+.PHONY: ioemu-stubdom
+ioemu-stubdom: lwip-cvs libxc ioemu
+	$(MAKE) -C mini-os TARGET=$@ LWIPDIR=$(CURDIR)/lwip-cvs APP_OBJS="$(CURDIR)/ioemu/i386-dm-stubdom/qemu.a $(CURDIR)/ioemu/i386-dm-stubdom/libqemu.a"
 
+CAMLLIB = $(shell ocamlc -where)
 .PHONY: caml-stubdom
-caml-stubdom: mk-symlinks lwip-cvs libxc cross-libpci caml
-	$(MAKE) -C mini-os LWIPDIR=$(CURDIR)/lwip-cvs CAMLDIR=$(CURDIR)/caml
+caml-stubdom: lwip-cvs libxc caml
+	$(MAKE) -C mini-os TARGET=$@ LWIPDIR=$(CURDIR)/lwip-cvs APP_OBJS="$(CURDIR)/caml/main-c.o $(CURDIR)/caml/main-caml.o $(CURDIR)/caml/caml.o $(CAMLLIB)/libasmrun.a"
 
 .PHONY: c-stubdom
-c-stubdom: mk-symlinks lwip-cvs libxc cross-libpci c
-	$(MAKE) -C mini-os LWIPDIR=$(CURDIR)/lwip-cvs CDIR=$(CURDIR)/c
+c-stubdom: lwip-cvs libxc c
+	$(MAKE) -C mini-os TARGET=$@ LWIPDIR=$(CURDIR)/lwip-cvs APP_OBJS=$(CURDIR)/c/main.a
 
 #########
 # install
 #########
 
-install: mini-os/mini-os.gz
+install: mini-os/ioemu-stubdom.gz
 	$(INSTALL_PROG) stubdom-dm "$(DESTDIR)/usr/lib/xen/bin"
-	$(INSTALL_PROG) mini-os/mini-os.gz "$(DESTDIR)/usr/lib/xen/boot/stubdom.gz"
+	$(INSTALL_PROG) $< "$(DESTDIR)/usr/lib/xen/boot/stubdom.gz"
 
 #######
 # clean
@@ -243,6 +246,7 @@
 clean:
 	-$(MAKE) -C mini-os LWIPDIR=$(CURDIR)/lwip-cvs clean
 	$(MAKE) -C caml clean
+	$(MAKE) -C c clean
 	rm -fr libxc ioemu mini-os include
 
 # clean the cross-compilation result
diff -r 2141ac752316 stubdom/c/Makefile
--- a/stubdom/c/Makefile	Fri May 23 15:43:32 2008 +0100
+++ b/stubdom/c/Makefile	Tue May 27 16:15:01 2008 +0100
@@ -2,7 +2,12 @@
 
 include $(XEN_ROOT)/Config.mk
 
-main.a: main.o
+all: main.a
+
+main-c.c:
+	ln -sf $(XEN_ROOT)/extras/mini-os/main.c $@
+
+main.a: main-c.o main.o 
 	$(AR) cr $@ $^
 
 clean:
--- a/stubdom/c/main.c	Fri May 23 15:43:32 2008 +0100
+++ b/stubdom/c/main.c	Tue May 27 16:15:01 2008 +0100
@@ -1,4 +1,6 @@
 #include <stdio.h>
+#include <unistd.h>
+
 int main(void) {
         sleep(2);
         printf("Hello, world!\n");
--- a/stubdom/caml/Makefile	Fri May 23 15:43:32 2008 +0100
+++ b/stubdom/caml/Makefile	Tue May 27 16:15:01 2008 +0100
@@ -1,12 +1,20 @@
 XEN_ROOT = ../..
 
 include $(XEN_ROOT)/Config.mk
+
+CAMLLIB = $(shell ocamlc -where)
+DEF_CPPFLAGS += -I$(CAMLLIB)
 
 OCAMLFIND=ocamlfind
 OCAMLOPT=ocamlopt
 
 OBJS := hello.cmx
 LIBS := 
+
+all: main-c.o main-caml.o caml.o
+
+main-c.c:
+	ln -sf $(XEN_ROOT)/extras/mini-os/main.c $@
 
 %.cmx: %.ml
 	$(OCAMLFIND) $(OCAMLOPT) -c $< -o $@
@@ -15,4 +23,4 @@
 	$(OCAMLFIND) $(OCAMLOPT) $(LIBS) $^ -output-obj -o $@
 
 clean:
-	rm -f *.o *.cmx *.cmi
+	rm -f *.a *.o *.cmx *.cmi
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/stubdom/caml/main-caml.c	Tue May 27 16:15:01 2008 +0100
@@ -0,0 +1,42 @@
+/*
+ * Caml bootstrap
+ *
+ * Samuel Thibault <Samuel.Thibault@eu.citrix.net>, January 2008
+ */
+
+#include <stdio.h>
+#include <errno.h>
+
+#include <caml/mlvalues.h>
+#include <caml/callback.h>
+#include <unistd.h>
+
+/* Ugly binary compatibility with Linux */
+FILE *_stderr asm("stderr");
+int *__errno_location;
+/* Will probably break everything, probably need to fetch from glibc */
+void *__ctype_b_loc;
+
+int main(int argc, char *argv[], char *envp[])
+{
+    value *val;
+
+    /* Get current thread's value */
+    _stderr = stderr;
+    __errno_location = &errno;
+
+    printf("starting caml\n");
+
+    /* Wait before things might hang up */
+    sleep(1);
+
+    caml_startup(argv);
+    val = caml_named_value("main");
+    if (!val) {
+        printf("Couldn't find Caml main");
+        return 1;
+    }
+    caml_callback(*val, Val_int(0));
+    printf("callback returned\n");
+    return 0;
+}
--- a/tools/ioemu/Makefile.target	Fri May 23 15:43:32 2008 +0100
+++ b/tools/ioemu/Makefile.target	Tue May 27 16:15:01 2008 +0100
@@ -355,6 +355,13 @@
 endif
 ifdef CONFIG_WIN32
 VL_OBJS+=tap-win32.o
+endif
+
+ifdef CONFIG_STUBDOM
+VL_OBJS+=main-qemu.o
+CFLAGS += -DCONFIG_QEMU
+main-qemu.c:
+	ln -s $(XEN_ROOT)/extras/mini-os/main.c $@
 endif
 
 ifdef CONFIG_STUBDOM