-# -Wswitch-enum, -Wunused-macros, -Wmissing-field-initializers,
-# -Wcast-align,
-# -Wunreachable-code -Wunused-parameter -Wlanguage-extension-token
-# -Wextended-offsetof
-my $clang_devteam_warn = "-Wno-unused-parameter -Wno-missing-field-initializers -Wno-language-extension-token -Wno-extended-offsetof -Wconditional-uninitialized -Qunused-arguments -Wincompatible-pointer-types-discards-qualifiers -Wmissing-variable-declarations";
-
-# These are used in addition to $gcc_devteam_warn unless this is a mingw build.
-# This adds backtrace information to the memory leak info.
-my $memleak_devteam_backtrace = "-rdynamic -DCRYPTO_MDEBUG_BACKTRACE";
+# -Wswitch-enum
+# -Wcast-align
+# -Wunreachable-code
+# -Wlanguage-extension-token -- no, we use asm()
+# -Wunused-macros -- no, too tricky for BN and _XOPEN_SOURCE etc
+# -Wextended-offsetof -- no, needed in CMS ASN1 code
+my $clang_devteam_warn = ""
+ . " -Qunused-arguments"
+ . " -Wextra"
+ . " -Wno-unused-parameter"
+ . " -Wno-missing-field-initializers"
+ . " -Wno-language-extension-token"
+ . " -Wno-extended-offsetof"
+ . " -Wconditional-uninitialized"
+ . " -Wincompatible-pointer-types-discards-qualifiers"
+ . " -Wmissing-variable-declarations"
+ ;
+
+# This adds backtrace information to the memory leak info. Is only used
+# when crypto-mdebug-backtrace is enabled.
+my $memleak_devteam_backtrace = "-rdynamic";