| Message ID | 75bbf88abac183780657794e020466a4a71489bf.1254855132.git.quintela@redhat.com |
|---|---|
| State | Superseded |
| Headers | show |
diff --git a/rules.mak b/rules.mak index 54ac88a..b380903 100644 --- 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 $(TARGET_DIR)$@")
This remove implicit rules + implicit variables. Explicit rules like the generation of %.h and %.c from %.hx still works as expected. As an added bonus, now the output of make -d is readable. As another added bonus, time spend on Makefiles is way smaller. We run make -j3 in a fully compiled tree, and results are: Before: $ time make -j3 real 0m1.225s user 0m1.660s sys 0m0.253s After: $ time make -j3 real 0m0.422s user 0m0.393s sys 0m0.248s Signed-off-by: Juan Quintela <quintela@redhat.com> --- rules.mak | 12 ++++++++++++ 1 files changed, 12 insertions(+), 0 deletions(-)