[Qemu-devel] [PATCH 1/4] Add config-devices.h again

[Eduardo Habkost <ehabkost@redhat.com>]

This reverts part of commit a992fe3d0fc185112677286f7a02204d8245b61e.

We do have code that needs #ifdefs depending on the list of enabled devices,
but currently that code breaks when we try to disable a feature that is enabled
by default.

For example, if we try to disable CONFIG_VMWARE_VGA, we get the following:

   LINK  x86_64-softmmu/qemu-system-x86_64
  pc.o: In function `pc_vga_init':
  /home/ehabkost/pessoal/proj/virt/qemu/qemu/hw/pc.c:991: undefined reference to `pci_vmsvga_init'
  collect2: ld returned 1 exit status
  make[1]: *** [qemu-system-x86_64] Error 1
  rm config-devices.h-timestamp
  make: *** [subdir-x86_64-softmmu] Error 2

config-devices.h will allow us to add an #ifdef to fix the above error, and
other similar cases.

Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
---
 Makefile        |    7 +++++--
 Makefile.target |    2 +-
 config.h        |   11 +++++++++++
 3 files changed, 17 insertions(+), 3 deletions(-)

diff --git a/Makefile b/Makefile
index 4e120a2..22b53f6 100644
--- a/Makefile
+++ b/Makefile
@@ -1,6 +1,6 @@
 # Makefile for QEMU.
 
-GENERATED_HEADERS = config-host.h trace.h qemu-options.def
+GENERATED_HEADERS = config-host.h trace.h qemu-options.def config-all-devices.h
 ifeq ($(TRACE_BACKEND),dtrace)
 GENERATED_HEADERS += trace-dtrace.h
 endif
@@ -77,6 +77,9 @@ config-host.h-timestamp: config-host.mak
 qemu-options.def: $(SRC_PATH)/qemu-options.hx
 	$(call quiet-command,sh $(SRC_PATH)/hxtool -h < $< > $@,"  GEN   $@")
 
+config-all-devices.h: config-all-devices.h-timestamp
+config-all-devices.h-timestamp: config-all-devices.mak
+
 SUBDIR_RULES=$(patsubst %,subdir-%, $(TARGET_DIRS))
 
 subdir-%: $(GENERATED_HEADERS)
@@ -190,7 +193,7 @@ clean:
 
 distclean: clean
 	rm -f config-host.mak config-host.h* config-host.ld $(DOCS) qemu-options.texi qemu-img-cmds.texi qemu-monitor.texi
-	rm -f config-all-devices.mak
+	rm -f config-all-devices.mak config-all-devices.h*
 	rm -f roms/seabios/config.mak roms/vgabios/config.mak
 	rm -f qemu-doc.info qemu-doc.aux qemu-doc.cp qemu-doc.dvi qemu-doc.fn qemu-doc.info qemu-doc.ky qemu-doc.log qemu-doc.pdf qemu-doc.pg qemu-doc.toc qemu-doc.tp qemu-doc.vr
 	rm -f qemu-tech.info qemu-tech.aux qemu-tech.cp qemu-tech.dvi qemu-tech.fn qemu-tech.info qemu-tech.ky qemu-tech.log qemu-tech.pdf qemu-tech.pg qemu-tech.toc qemu-tech.tp qemu-tech.vr
diff --git a/Makefile.target b/Makefile.target
index 2800f47..03fc486 100644
--- a/Makefile.target
+++ b/Makefile.target
@@ -1,6 +1,6 @@
 # -*- Mode: makefile -*-
 
-GENERATED_HEADERS = config-target.h
+GENERATED_HEADERS = config-target.h config-devices.h
 CONFIG_NO_KVM = $(if $(subst n,,$(CONFIG_KVM)),n,y)
 
 include ../config-host.mak
diff --git a/config.h b/config.h
index e20f786..07d79d4 100644
--- a/config.h
+++ b/config.h
@@ -1,2 +1,13 @@
+
 #include "config-host.h"
 #include "config-target.h"
+
+/* We want to include different config files for specific targets
+   And for the common library.  They need a different name because
+   we don't want to rely in paths */
+
+#if defined(NEED_CPU_H)
+#include "config-devices.h"
+#else
+#include "config-all-devices.h"
+#endif
-- 
1.7.3.2