That didn't work, so try this awk command from Robert Elz.

[nmh] / configure.ac

diff --git a/configure.ac b/configure.ac
index 6ff7c9dff0e72e7abb9c89d6532c292d922438a9..520c8d42dbdcb44850feaeac9b2a5bd38dd18fde 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -121,6 +121,20 @@ if test "$GCC" = yes; then
        [nmh_cv_has_dash_ansi=no])
      CPPFLAGS="$nmh_saved_cppflags"
      CFLAGS="$nmh_saved_cflags"])
+
+  dnl Disable clang complaint about unused -ansi when linking.
+  AC_CACHE_CHECK([whether linker supports -Qunused-arguments],
+                 [nmh_cv_has_q_unused_arguments],
+    [nmh_saved_ldflags="$LDFLAGS"
+     LDFLAGS="$LDFLAGS -Qunused-arguments"
+     AC_TRY_LINK([],[],nmh_cv_has_q_unused_arguments=yes,
+                 nmh_cv_has_q_unused_arguments=no)
+     LDFLAGS="$nmh_saved_ldflags"])
+
+  if test "$nmh_cv_has_q_unused_arguments" = "yes"; then
+    test -z "$LDFLAGS" && LDFLAGS=-Qunused-arguments \
+                       || LDFLAGS="$LDFLAGS -Qunused-arguments"
+  fi
 else
   nmh_cv_has_dash_ansi=no
 fi
@@ -565,7 +579,7 @@ dnl http://sourceforge.net/p/flex/bugs/140/
 AS_IF([test "$LEX" = flex],
       [AS_CASE([`$LEX -V`],
                [flex\ 2.5.35], [[LFLAGS=\
-'; cp -p $@ $@.ORIGINAL; printf "%s\n" '\''1,$$s/(size_t) \(num_to_read\)/\1/'\'' w q | ed -s $@; diff $@ $@.ORIGINAL || true']],
+'; printf "%s\n" '\''1,$$s/(size_t) \(num_to_read\)/\1/'\'' w q | ed -s $@']],
                [flex\ 2.5.3@<:@67@:>@], [[LFLAGS=\
 '; printf "%s\n" '\''1,$$s/\(  \)int i;/\1yy_size_t i;/'\'' w q | ed -s $@']])
        AC_SUBST([LFLAGS])])