Enable warning for deprecated declarations on macOS (#8947)
diff --git a/configure.ac b/configure.ac
index dd5cb62..f3909f7 100644
--- a/configure.ac
+++ b/configure.ac
@@ -874,7 +874,7 @@
darwin)
AS_IF([test "x$ax_cv_c_compiler_vendor" = "xclang"], [
- common_opt="-pipe -Wall -Wno-deprecated-declarations -Qunused-arguments -Wextra -Wno-ignored-qualifiers -Wno-unused-parameter"
+ common_opt="-pipe -Wall -Qunused-arguments -Wextra -Wno-ignored-qualifiers -Wno-unused-parameter"
debug_opt="-g $common_opt"
release_opt="-g $common_opt $optimizing_flags -fno-strict-aliasing"
cxx_opt="-Wno-invalid-offsetof"