[Qemu-devel] [PATCH] keycodemapdb: try fix makefile deps

[Gerd Hoffmann <kraxel@redhat.com>]

(1) make .git-submodule-status depend on config-host.mak,
    for GIT_SUBMODULES changes.

(2) make $(KEYCODEMAP_{GEN,CSV}) depend on .git-submodule-status
    so make knows what to do if they are not there.

I still get errors because make tries to generate the files before they are checked out,
but make seems to notice it has to start over and correctly generates the files on the
second attempt.

[ ... ]
  GEN     config-host.h
  GEN     module_block.h
  GEN     ui/input-keymap-linux-to-qcode.c
  GEN     ui/input-keymap-qcode-to-qnum.c
  GEN     ui/input-keymap-qnum-to-qcode.c
python: can't open file '/home/kraxel/projects/qemu/ui/keycodemapdb/tools/keymap-gen': [Errno 2] No such file or directory
python: can't open file '/home/kraxel/projects/qemu/ui/keycodemapdb/tools/keymap-gen': [Errno 2] No such file or directory
python: can't open file '/home/kraxel/projects/qemu/ui/keycodemapdb/tools/keymap-gen': [Errno 2] No such file or directory
make: Leaving directory `/home/kraxel/projects/qemu/build-default'
make: Entering directory `/home/kraxel/projects/qemu/build-default'
  GIT     ui/keycodemapdb
  GEN     trace/generated-tcg-tracers.h
  GEN     trace/generated-helpers-wrappers.h
  GEN     trace/generated-helpers.h
  GEN     trace/generated-helpers.c
  GEN     ui/input-keymap-linux-to-qcode.c
  GEN     ui/input-keymap-qcode-to-qnum.c
  GEN     ui/input-keymap-qnum-to-qcode.c
  CC      qga/main.o
[ ... ]
---
 Makefile | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/Makefile b/Makefile
index 1d3b31f074..c97258629e 100644
--- a/Makefile
+++ b/Makefile
@@ -33,7 +33,7 @@ git-submodule-update:
 endif
 endif
 
-.git-submodule-status: git-submodule-update
+.git-submodule-status: git-submodule-update config-host.mak
 
 Makefile: .git-submodule-status
 
@@ -225,7 +225,7 @@ KEYCODEMAP_FILES = \
 
 GENERATED_FILES += $(KEYCODEMAP_FILES)
 
-ui/input-keymap-%.c: $(KEYCODEMAP_GEN) $(KEYCODEMAP_CSV) $(SRC_PATH)/ui/Makefile.objs .git-submodule-status
+ui/input-keymap-%.c: $(KEYCODEMAP_GEN) $(KEYCODEMAP_CSV) $(SRC_PATH)/ui/Makefile.objs
 	$(call quiet-command,\
 	    src=$$(echo $@ | sed -E -e "s,^ui/input-keymap-(.+)-to-(.+)\.c$$,\1,") && \
 	    dst=$$(echo $@ | sed -E -e "s,^ui/input-keymap-(.+)-to-(.+)\.c$$,\2,") && \
@@ -235,6 +235,9 @@ ui/input-keymap-%.c: $(KEYCODEMAP_GEN) $(KEYCODEMAP_CSV) $(SRC_PATH)/ui/Makefile
 	          code-map $(KEYCODEMAP_CSV) $${src} $${dst} \
 	        > $@ || rm $@, "GEN", "$@")
 
+$(KEYCODEMAP_GEN): .git-submodule-status
+$(KEYCODEMAP_CSV): .git-submodule-status
+
 # Don't try to regenerate Makefile or configure
 # We don't generate any of them
 Makefile: ;
-- 
2.9.3