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-rw-r--r--scripts/Makefile.build6
1 files changed, 6 insertions, 0 deletions
diff --git a/scripts/Makefile.build b/scripts/Makefile.build
index 37cf88d076e8..799df12b53f3 100644
--- a/scripts/Makefile.build
+++ b/scripts/Makefile.build
@@ -222,6 +222,10 @@ endif
cmd_check_local_export = $(srctree)/scripts/check-local-export $@
+ifneq ($(findstring 1, $(KBUILD_EXTRA_WARN)),)
+cmd_warn_shared_object = $(if $(word 2, $(modname-multi)),$(warning $(kbuild-file): $*.o is added to multiple modules: $(modname-multi)))
+endif
+
define rule_cc_o_c
$(call cmd_and_fixdep,cc_o_c)
$(call cmd,gen_ksymdeps)
@@ -231,6 +235,7 @@ define rule_cc_o_c
$(call cmd,gen_objtooldep)
$(call cmd,gen_symversions_c)
$(call cmd,record_mcount)
+ $(call cmd,warn_shared_object)
endef
define rule_as_o_S
@@ -239,6 +244,7 @@ define rule_as_o_S
$(call cmd,check_local_export)
$(call cmd,gen_objtooldep)
$(call cmd,gen_symversions_S)
+ $(call cmd,warn_shared_object)
endef
# Built-in and composite module parts