$(qexec)$$(AR) $$(ARFLAGS) $$@ $$^
endef
+# Don't use -Wl,-z,defs with Clang's sanitizers.
+#
+# Clang's AddressSanitizer documentation says "When linking shared libraries,
+# the AddressSanitizer run-time is not linked, so -Wl,-z,defs may cause link
+# errors (don't use it with AddressSanitizer)." See
+# https://clang.llvm.org/docs/AddressSanitizer.html#usage.
+NO_UNDEFINED := -Wl,-z,defs
+ifeq ($(findstring clang,$(CC)),clang)
+ ifneq ($(filter -fsanitize=%,$(LDFLAGS)),)
+ NO_UNDEFINED :=
+ endif
+endif
+
define so_template
# Not using a pattern rule here because we don't want to generate empty
# archives when they are listed as a dependency in files not responsible
$(1):
$(if $(quiet),@echo " [LD] $$@")
$(qexec)$$(LD) -shared $$(LDFLAGS) \
- -Wl,--no-undefined -Wl,-soname,$$(SONAME) \
+ $(NO_UNDEFINED) \
+ -Wl,-soname,$$(SONAME) \
-Wl,--version-script,$$(EXPORTS_FILE) -o $$@ \
$$(filter %.o,$$^) $$(extralibs)
endef