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build: add option to warn on recursive dependency

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This addes the option to treat recursive dependencies as warnings
instead of errors, by running make with WARN_RECURSIVE_DEP=1.

Note that the script/config targets will not get rebuilt when you add or
remove WARN_RECURSIVE_DEP while running make.  One must run
'make config-clean' before building config with a different setting.

Signed-off-by: Eneas U de Queiroz <cotequeiroz@gmail.com>
This commit is contained in:
Eneas U de Queiroz
2020-04-07 17:07:24 -03:00
committed by Petr Štetiar
parent dcf3e63a35
commit 3204430e38
3 changed files with 10 additions and 1 deletions
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2
include/toplevel.mk
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@@ -102,7 +102,7 @@ prepare-tmpinfo: FORCE
ifneq ($(DISTRO_PKG_CONFIG),)
scripts/config/%onf: export PATH:=$(dir $(DISTRO_PKG_CONFIG)):$(PATH)
endif
scripts/config/%onf: CFLAGS+= -O2
scripts/config/%onf: CFLAGS+= -O2 $(if $(WARN_RECURSIVE_DEP),-DWARN_RECURSIVE_DEP)
scripts/config/%onf:
@$(_SINGLE)$(SUBMAKE) -s -C scripts/config $(notdir $@) CC="$(HOSTCC_WRAPPER)"