stubdom: add C example target

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

extras/mini-os/Makefile

@@ -88,6 +88,11 @@ OBJS += $(QEMUDIR)/i386-dm-stubdom/qemu.a $(QEMUDIR)/i386-dm-stubdom/libqemu.a
 CFLAGS += -DCONFIG_QEMU
 endif
 
+ifneq ($(CDIR),)
+OBJS += $(CDIR)/main.a
+LDLIBS += 
+endif
+
 ifeq ($(libc),y)
 LDLIBS += -L$(XEN_ROOT)/stubdom/libxc -lxenctrl -lxenguest
 LDLIBS += -lpci
@@ -95,7 +100,7 @@ LDLIBS += -lz
 LDLIBS += -lc
 endif
 
-ifneq ($(caml)-$(qemu)-$(lwip),--y)
+ifneq ($(caml)-$(qemu)-$(CDIR)-$(lwip),---y)
 OBJS := $(filter-out daytime.o, $(OBJS))
 endif
 

stubdom/Makefile

@@ -201,6 +201,14 @@ ioemu: cross-zlib cross-libpci mk-symlinks libxc
 caml:
 	$(MAKE) -C $@
 
+###
+# C
+###
+
+.PHONY: c
+c:
+	$(MAKE) -C $@
+
 ########
 # minios
 ########
@@ -211,7 +219,11 @@ qemu-stubdom: mk-symlinks lwip-cvs libxc ioemu
 
 .PHONY: caml-stubdom
 caml-stubdom: mk-symlinks lwip-cvs libxc cross-libpci caml
-	$(MAKE) -C mini-os LWIPDIR=$(CURDIR)/lwia-cvs CAMLDIR=$(CURDIR)/caml
+	$(MAKE) -C mini-os LWIPDIR=$(CURDIR)/lwip-cvs CAMLDIR=$(CURDIR)/caml
+
+.PHONY: c-stubdom
+c-stubdom: mk-symlinks lwip-cvs libxc cross-libpci c
+	$(MAKE) -C mini-os LWIPDIR=$(CURDIR)/lwip-cvs CDIR=$(CURDIR)/c
 
 #########
 # install

stubdom/c/Makefile

@@ -0,0 +1,9 @@
+XEN_ROOT = ../..
+
+include $(XEN_ROOT)/Config.mk
+
+main.a: main.o
+	$(AR) cr $@ $^
+
+clean:
+	rm -f *.a *.o

stubdom/c/main.c

@@ -0,0 +1,6 @@
+#include <stdio.h>
+int main(void) {
+        sleep(2);
+        printf("Hello, world!\n");
+        return 0;
+}