[RFC kvm-unit-tests PATCH 5/8] Makefile: add explicit mkdir for .o targets

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This is fairly direct way of ensuring the target build directories are
created before we build a binary blob. mkdir -p fails gracefully if
the directory is already there.

Signed-off-by: Alex Bennée <alex.bennee@xxxxxxxxxx>
---
 Makefile | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/Makefile b/Makefile
index 781186e..56598df 100644
--- a/Makefile
+++ b/Makefile
@@ -79,8 +79,13 @@ $(LIBFDT_archive): $(addprefix $(LIBFDT_objdir)/,$(LIBFDT_OBJS))
 	$(AR) rcs $@ $^
 
 %.o: %.S
+	mkdir -p $(dir $@)
 	$(CC) $(CFLAGS) -c -nostdlib -o $@ $<
 
+%.o: %.c
+	mkdir -p $(dir $@)
+	$(CC) $(CFLAGS) -c -o $@ $<
+
 -include */.*.d */*/.*.d
 
 all: $(shell git -C $(SRCDIR) rev-parse --verify --short=8 HEAD >build-head 2>/dev/null)
-- 
2.11.0




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