[Qemu-devel] [PATCH v3 1/2] make: fix where dependency *.d are stored.

[Victor Kaplansky <victork@redhat.com>]

In rules like "bar/%.o: %.c" there is a difference between $(*D) and
$(@D). $(*D) expands to '.', while $(@D) expands to 'bar'.  It is
cleaner to generate *.d in the same directory where appropriate *.o
resides. This allows precise including of dependency info from .d files.

As a hack, we also touch two sources for generated *.hex files.  Without
this hack, anyone doing "git pull; make" will not get *.hex rebuilt
correctly since the dependency file would be missing.

Signed-off-by: Victor Kaplansky <victork@redhat.com>
---
 hw/i386/acpi-dsdt.dsl     | 1 -
 hw/i386/q35-acpi-dsdt.dsl | 1 +
 rules.mak                 | 2 +-
 3 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/hw/i386/acpi-dsdt.dsl b/hw/i386/acpi-dsdt.dsl
index a2d84ec..8dba096 100644
--- a/hw/i386/acpi-dsdt.dsl
+++ b/hw/i386/acpi-dsdt.dsl
@@ -43,7 +43,6 @@ DefinitionBlock (
 
 #include "acpi-dsdt-hpet.dsl"
 
-
 /****************************************************************
  * PIIX4 PM
  ****************************************************************/
diff --git a/hw/i386/q35-acpi-dsdt.dsl b/hw/i386/q35-acpi-dsdt.dsl
index 16eaca3..7be7b37 100644
--- a/hw/i386/q35-acpi-dsdt.dsl
+++ b/hw/i386/q35-acpi-dsdt.dsl
@@ -22,6 +22,7 @@
  * Based on acpi-dsdt.dsl, but heavily modified for q35 chipset.
  */
 
+
 ACPI_EXTRACT_ALL_CODE Q35AcpiDsdtAmlCode
 
 DefinitionBlock (
diff --git a/rules.mak b/rules.mak
index aec27f8..6e35c36 100644
--- a/rules.mak
+++ b/rules.mak
@@ -17,7 +17,7 @@ MAKEFLAGS += -rR
 QEMU_CXXFLAGS = -D__STDC_LIMIT_MACROS $(filter-out -Wstrict-prototypes -Wmissing-prototypes -Wnested-externs -Wold-style-declaration -Wold-style-definition -Wredundant-decls, $(QEMU_CFLAGS))
 
 # Flags for dependency generation
-QEMU_DGFLAGS += -MMD -MP -MT $@ -MF $(*D)/$(*F).d
+QEMU_DGFLAGS += -MMD -MP -MT $@ -MF $(@D)/$(*F).d
 
 # Same as -I$(SRC_PATH) -I., but for the nested source/object directories
 QEMU_INCLUDES += -I$(<D) -I$(@D)
-- 
--Victor