Drop --whole-archive and static libraries

Juan has contributed a cool Makefile infrastructure that enables us to drop
static libraries completely:

Move shared obj-y definitions to Makefile.objs, prefixed {common-,hw-,user-},
and link those object files directly into the executables.

Replace HWLIB by HWDIR, specifying only the directory.

Drop --whole-archive and ARLIBS in Makefiles and configure.

Drop GENERATED_HEADERS dependency in rules.mak, since this rebuilds all
common objects after generating a target-specific header; add dependency
rules to Makefile and Makefile.target instead.

v2:
- Don't try to include /config.mak for user emulators
- Changes to user object paths ("Quickfix for libuser.a drop") were obsoleted
  by "user_only: compile everything with -fpie" (Kirill A. Shutemov)

v3:
- Fix dependency modelling for tools
- Remove comment on GENERATED_HEADERS obsoleted by this patch

Signed-off-by: Andreas Färber <afaerber@opensolaris.org>
Cc: Blue Swirl <blauwirbel@gmail.com>
Cc: Palle Lyckegaard <palle@lyckegaard.dk>
Cc: Ben Taylor <bentaylor.solx86@gmail.com>
Cc: Juan Quintela <quintela@trasno.org>
Cc: Kirill A. Shutemov <kirill@shutemov.name>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>

1 files changed, 2 insertions, 7 deletions

diff --git a/Makefile.user b/Makefile.user
index 7daedeff6d..c6ac50940a 100644
--- a/Makefile.user
+++ b/Makefile.user
@@ -14,17 +14,12 @@ vpath %.c %.h $(SRC_PATH)
 
 QEMU_CFLAGS+=-I..
 
-obj-y =
-obj-y += envlist.o path.o
-obj-y += tcg-runtime.o host-utils.o
-obj-y += cutils.o cache-utils.o
+include $(SRC_PATH)/Makefile.objs
 
-all: libuser.a
+all: $(user-obj-y)
 # Dummy command so that make thinks it has done something
 	@true
 
-libuser.a: $(obj-y)
-
 clean:
 	rm -f *.o *.d *.a *~