fix(romlib): prevent race condition on the build directory
When building with many cores (-j64), there's a good chance that the
rule to make the build directory is getting executed at the same time as
the rule for romlib.ldflags. On my machine, the former is slower,
resulting in romlib_generator.py not being able to write the file as the
directory doesn't exist yet.
Add an explicit dependency on the build directory for the target.
This ensures that we have a build directory before we start putting
stuff in it.
Change-Id: I120b0dc66c692c759ab1046c735be405b41db87c
Signed-off-by: Boyan Karatotev <boyan.karatotev@arm.com>
diff --git a/lib/romlib/Makefile b/lib/romlib/Makefile
index 3d2b850..523e324 100644
--- a/lib/romlib/Makefile
+++ b/lib/romlib/Makefile
@@ -83,7 +83,7 @@
$(s)echo " TBL $@"
$(q)$(ROMLIB_GEN) gentbl --output $@ --bti=$(ENABLE_BTI) $<
-$(BUILD_DIR)/romlib.ldflags: ../../$(PLAT_DIR)/jmptbl.i
+$(BUILD_DIR)/romlib.ldflags: ../../$(PLAT_DIR)/jmptbl.i | $$(@D)/
$(s)echo " LDFLAGS $@"
$(q)$(ROMLIB_GEN) link-flags $< > $@