Move generation of config-host.h to Makefile from configure

[qemu.git] / rules.mak

diff --git a/rules.mak b/rules.mak
index c0315acaf8addd7c59391aa7451453abd191e545..ca95351d961ec442b293f6c6c50c531ed8cab5c3 100644 (file)
--- a/rules.mak
+++ b/rules.mak
@@ -1,4 +1,16 @@
 
+# Don't use implicit rules or variables
+# we have explicit rules for everything
+MAKEFLAGS += -rR
+
+# Files with this suffixes are final, don't try to generate them
+# using implicit rules
+%.d:
+%.h:
+%.c:
+%.m:
+%.mak:
+
 %.o: %.c
        $(call quiet-command,$(CC) $(QEMU_CFLAGS) $(CFLAGS) -c -o $@ $<,"  CC    $(TARGET_DIR)$@")
 
@@ -19,7 +31,16 @@ LINK = $(call quiet-command,$(CC) $(LDFLAGS) -o $@ $(1) $(ARLIBS_BEGIN) $(ARLIBS
 quiet-command = $(if $(V),$1,$(if $(2),@echo $2 && $1, @$1))
 
 # cc-option
-# Usage: CFLAGS+=$(call cc-option, $(CFLAGS), -falign-functions=0, -malign-functions=0)
+# Usage: CFLAGS+=$(call cc-option, -falign-functions=0, -malign-functions=0)
+
+cc-option = $(if $(shell $(CC) $1 $2 -S -o /dev/null -xc /dev/null \
+              >/dev/null 2>&1 && echo OK), $2, $3)
+
+# Generate timestamp files for .h include files
+
+%.h: %.h-timestamp
+       @test -f $@ || cp $< $@
 
-cc-option = $(shell if $(CC) $(1) $(2) -S -o /dev/null -xc /dev/null \
-              > /dev/null 2>&1; then echo "$(2)"; else echo "$(3)"; fi ;)
+%.h-timestamp: %.mak
+       $(call quiet-command, $(SRC_PATH)/create_config < $< > $@, "  GEN   $*.h")
+       @cmp $@ $*.h >/dev/null 2>&1 || cp $@ $*.h